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Jang M, Lee M, Chung S, Park SA, Park H, Jeon H, Jegal J, Park SB, Oh DX, Shin G, Kim HJ. Ecotoxicity assessment of additives in commercial biodegradable plastic products: Implications for sustainability and environmental risk. Sci Total Environ 2024:172903. [PMID: 38697526 DOI: 10.1016/j.scitotenv.2024.172903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 03/11/2024] [Accepted: 04/28/2024] [Indexed: 05/05/2024]
Abstract
Biodegradable plastics have gained popularity as environmentally friendly alternatives to conventional petroleum-based plastics, which face recycling and degradation challenges. Although the biodegradability of these plastics has been established, research on their ecotoxicity remains limited. Biodegradable plastics may still contain conventional additives, including toxic and non-degradable substances, to maintain their functionality during production and processing. Despite degrading the polymer matrix, these additives can persist in the environment and potentially harm ecosystems and humans. Therefore, this study aimed to assess the potential ecotoxicity of biodegradable plastics by analyzing the phthalate esters (PAEs) leaching out from biodegradable plastics through soil leachate. Sixteen commercial biodegradable plastic products were qualitatively and quantitatively analyzed using gas chromatography-mass spectrometry to determine the types and amounts of PAE used in the products and evaluate their ecotoxicity. Among the various PAEs analyzed, non-regulated dioctyl isophthalate (DOIP) was the most frequently detected (ranging from 40 to 212 μg g-1). Although the DOIP is considered one of PAE alternatives, the detected amount of it revealed evident ecotoxicity, especially in the aquatic environment. Other additives, including antioxidants, lubricants, surfactants, slip agents, and adhesives, were also qualitatively detected in commercial products. This is the first study to quantify the amounts of PAEs leached from biodegradable plastics through water mimicking PAE leaching out from biodegradable plastics to soil leachate when landfilled and evaluate their potential ecotoxicity. Despite their potential toxicity, commercial biodegradable plastics are currently marketed and promoted as environmentally friendly materials, which could lead to indiscriminate public consumption. Therefore, in addition to improving biodegradable plastics, developing eco-friendly additives is significant. Future studies should investigate the leaching kinetics in soil leachate over time and toxicity of biodegradable plastics after landfill disposal.
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Affiliation(s)
- Min Jang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Minkyung Lee
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Seonghyn Chung
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Seul-A Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Huijeong Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jonggeon Jegal
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Sung Bae Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Giyoung Shin
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Hyo Jeong Kim
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea.
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Oh J, Park SB, Cha C, Hwang DK, Park SA, Park J, Oh DX, Jeon H, Koo JM. Structural evaluation of Poly(lactic acid) degradation at standardized composting temperature of 58 degrees. Chemosphere 2024; 354:141729. [PMID: 38492680 DOI: 10.1016/j.chemosphere.2024.141729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/20/2024] [Accepted: 03/14/2024] [Indexed: 03/18/2024]
Abstract
The accumulation of petroleum-based plastics on our planet is causing serious environmental pollution. Biodegradable plastics, promoted as eco-friendly solutions, hold the potential to address this issue. However, their impact on the environment and the mechanisms of their natural degradation remain inadequately understood. Furthermore, the specific conditions set forth in international standards for evaluating the biodegradability of biodegradable plastics have led to misconceptions about their real-world behavior. To properly elucidate the relationship between their degradability and structure, this study mimics the thermal effect on poly(lactic acid) (PLA) under standardized composting temperature. The higher the crystallinity of PLA, the lower the degradation rate, which suggests that crystallinity is a key factor in determining degradation. The composting temperature of 58 °C induces crystallization by having a structural effect on the polymer, which in turn reduces the degradation rate of PLA. Therefore, control over temperature and crystallization during the processing and degradation of PLA is crucial, as it not only determines the biodegradability but also enhances the utility.
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Affiliation(s)
- Jiwon Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Sung Bae Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Chaenyung Cha
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Dong Ki Hwang
- Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Seul-A Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107, Republic of Korea
| | - Dongyeop X Oh
- Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering, Inha University, Incheon, 22212, Republic of Korea.
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials & Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
| | - Jun Mo Koo
- Department of Organic Materials Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea.
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Kim S, Jeon H, Koo JM, Oh DX, Park J. Practical Applications of Self-Healing Polymers Beyond Mechanical and Electrical Recovery. Adv Sci (Weinh) 2024; 11:e2302463. [PMID: 38361378 DOI: 10.1002/advs.202302463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 12/15/2023] [Indexed: 02/17/2024]
Abstract
Self-healing polymeric materials, which can repair physical damage, offer promising prospects for protective applications across various industries. Although prolonged durability and resource conservation are key advantages, focusing solely on mechanical recovery may limit the market potential of these materials. The unique physical properties of self-healing polymers, such as interfacial reduction, seamless connection lines, temperature/pressure responses, and phase transitions, enable a multitude of innovative applications. In this perspective, the diverse applications of self-healing polymers beyond their traditional mechanical strength are emphasized and their potential in various sectors such as food packaging, damage-reporting, radiation shielding, acoustic conservation, biomedical monitoring, and tissue regeneration is explored. With regards to the commercialization challenges, including scalability, robustness, and performance degradation under extreme conditions, strategies to overcome these limitations and promote successful industrialization are discussed. Furthermore, the potential impacts of self-healing materials on future research directions, encompassing environmental sustainability, advanced computational techniques, integration with emerging technologies, and tailoring materials for specific applications are examined. This perspective aims to inspire interdisciplinary approaches and foster the adoption of self-healing materials in various real-life settings, ultimately contributing to the development of next-generation materials.
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Affiliation(s)
- Semin Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Jun Mo Koo
- Department of Organic Materials Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering, Inha University, Incheon, 22212, Republic of Korea
| | - Jeyoung Park
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107, Republic of Korea
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Lee M, Kwak H, Eom Y, Park SA, Sakai T, Jeon H, Koo JM, Kim D, Cha C, Hwang SY, Park J, Oh DX. Network of cyano-p-aramid nanofibres creates ultrastiff and water-rich hydrospongels. Nat Mater 2024; 23:414-423. [PMID: 38182810 DOI: 10.1038/s41563-023-01760-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 11/14/2023] [Indexed: 01/07/2024]
Abstract
The structure-property paradox of biological tissues, in which water-rich porous structures efficiently transfer mass while remaining highly mechanically stiff, remains unsolved. Although hydrogel/sponge hybridization is the key to understanding this phenomenon, material incompatibility makes this a challenging task. Here we describe hydrogel/sponge hybrids (hydrospongels) that behave as both ultrastiff water-rich gels and reversibly squeezable sponges. The self-organizing network of cyano-p-aramid nanofibres holds approximately 5,000 times more water than its solid content. Hydrospongels, even at a water concentration exceeding 90 wt%, are hard as cartilage with an elastic modulus of 50-80 MPa, and are 10-1,000 times stiffer than typical hydrogels. They endure a compressive strain above 85% through poroelastic relaxation and hydrothermal pressure at 120 °C. This performance is produced by amphiphilic surfaces, high rigidity and an interfibrillar, interaction-driven percolating network of nanofibres. These features can inspire the development of future biofunctional materials.
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Affiliation(s)
- Minkyung Lee
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea
| | - Hojung Kwak
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea
| | - Youngho Eom
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea
- Department of Polymer Engineering, Pukyong National University, Busan, Republic of Korea
| | - Seul-A Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea
| | - Takamasa Sakai
- Department of Bioengineering, Graduate School of Engineering, University of Tokyo, Tokyo, Japan
| | - Hyeonyeol Jeon
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea
- Department of Organic Materials Engineering, Chungnam National University, Daejeon, Republic of Korea
| | - Dowan Kim
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea
| | - Chaenyung Cha
- Center for Multidimensional Programmable Matter, Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea.
- Department of Plant & Environmental New Resources and Graduate School of Biotechnology, Kyung Hee University, Gyeonggi-Do, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea.
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, Republic of Korea.
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, Republic of Korea.
- Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering, Inha University, Incheon, Republic of Korea.
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Jeon H, Son JH, Lee J, Park SB, Ju S, Oh DX, Koo JM, Park J. Preparation of a nanocellulose/nanochitin coating on a poly(lactic acid) film for improved hydrolysis resistance. Int J Biol Macromol 2024; 254:127790. [PMID: 37926305 DOI: 10.1016/j.ijbiomac.2023.127790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 10/24/2023] [Accepted: 10/29/2023] [Indexed: 11/07/2023]
Abstract
Growing concerns regarding plastic waste have prompted various attempts to replace plastic packaging films with biodegradable alternatives such as poly(lactic acid) (PLA). However, their low hydrolysis resistance owing to the presence of aliphatic polyesters limits the shelf life of biodegradable polymers. Hydrolysis leads to the deterioration of mechanical performance, which is a key disadvantage of biodegradable plastics. In this study, a layer-by-layer (LBL) assembly method was used for the dip-coating of biorenewable, biodegradable nanocellulose/nanochitin on the PLA surface. Additional crosslinking and compression of the coated nanofibers, each containing carboxylic acid and amine groups, respectively, were induced through electromagnetic microwave irradiation to protect the PLA film by improving hydrolysis resistance. The coatings were examined by morphological observations and water contact angle measurements. The LBL coatings of differently charged nanofibers of 10.6 μm were reduced to 40 % after microwave treatment, and the thickness does not vary after the hydrolysis experiment. Microwave irradiation increased the water contact angle owing to amide linkage formation, thereby preventing the peeling off of coating layers. Improved hydrolysis resistance inhibited the reduction in molecular weight and tensile strength. These findings could be used to develop sustainable and biodegradable plastic packaging films with a prolonged shelf life.
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Affiliation(s)
- Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Joo Hee Son
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Junhyeok Lee
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea; Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea
| | - Sung Bae Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Sungbin Ju
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea.
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Department of Organic Material Engineering, Chungnam National University, Daejeon 34134, Republic of Korea..
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea.
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Jung H, Shin G, Park SB, Jegal J, Park SA, Park J, Oh DX, Kim HJ. Circular waste management: Superworms as a sustainable solution for biodegradable plastic degradation and resource recovery. Waste Manag 2023; 171:568-579. [PMID: 37812971 DOI: 10.1016/j.wasman.2023.09.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/25/2023] [Accepted: 09/21/2023] [Indexed: 10/11/2023]
Abstract
Bioplastics offer a promising solution to plastic pollution, however, their production frequently relies on edible biomass, and their degradation rates remain inadequate. This study investigates the potential of superworms (Zophobas atratus larvae) for polybutylene succinate (PBS) waste management, aiming to achieve both resource recovery and biodegradation. Superworms exclusively fed on PBS for a month exhibited the same survival rate as those on a standard bran diet. PBS digestion yielded a 5.13% weight gain and a 23.23% increase in protein composition in superworms. Additionally, carbon isotope analyses substantiated the conversion of PBS into superworm components. Gut microbes capable of PBS biodegradation became progressively prominent, further augmenting the degradation rate of PBS under composting conditions (ISO 14855-1). Gut-free superworms fed with PBS exhibited antioxidant activities comparable to those of blueberries, renowned for their high antioxidant activity. Based on these findings, this study introduces a sustainable circular solution encompassing recycling PBS waste to generate insect biomass, employing insect gut and frass for PBS degradation and fertilizer, and harnessing insect residue as a food source. In essence, the significance of this research extends to socio-economic and environmental spheres, impacting waste management, resource efficiency, circular economy promotion, environmental preservation, industrial advancement, and global sustainability objectives. The study's outcomes possess the potential to reshape society's approach to plastic waste, facilitating a shift toward more sustainable paradigms.
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Affiliation(s)
- Hyuni Jung
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Giyoung Shin
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Sung Bae Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Jonggeon Jegal
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Seul-A Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea.
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering, Inha University, Incheon 22212, Republic of Korea.
| | - Hyo Jeong Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea.
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Jang M, Lee M, Yang H, Lee H, Park SB, Jeon H, Hwang SY, Kim HJ, Oh DX, Park J. Method to analyze phthalate esters from soft toys dissolving into water mimicking infant playing. Chemosphere 2023; 330:138695. [PMID: 37080474 DOI: 10.1016/j.chemosphere.2023.138695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Along with bisphenol-A (BPA), conventional phthalate esters (PAEs) have been reported as environmental hormones, despite their functional usefulness as plasticizers. Nevertheless, they are frequently found in various products, including children's utensils and toys made of poly (vinyl chloride). This is tremendously important because PAEs are harmful to infants. In addition, gel/slime-type toys made of poly (vinyl alcohol) are currently popular for developing infant' tactile senses. In this study, we developed a method to qualitatively and quantitatively detect PAEs in gel/slime-type toys mimicking, infants playing with them in a bathtub. As a result, 1,2-cyclohexanedicarboxylic acid diisononyl ester (DINCH), one of the PAE alternatives, transferred into the water from the toys and was detected most commonly (108-719 μg g-1; 0.01-0.07 wt%) among PAEs. The detected DINCH levels were below the universally accepted levels for PAEs (0.1 wt%). However, the amount of DINCH detected could still be toxic, in accordance with toxicity tests using water fleas. Furthermore, unpleasant odors were emitted when the toys containing toxic volatile organic compounds were unpacked. This is the first study to develop a method to analyze PAE in gel/slime-type toys and determine that alternatives to conventional PAEs cannot be unconditionally regarded as safe chemicals. Therefore, the revised standards for regulating PAEs and their alternatives must be reconsidered.
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Affiliation(s)
- Min Jang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Minkyung Lee
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyemin Yang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Huichan Lee
- Core Research Facilities, Pusan National University, Busan, 46241, Republic of Korea
| | - Sung Bae Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Department of Plant & Environmental New Resources and Graduate School of Biotechnology, Kyung Hee University, Gyeonggi-do, 17104, Republic of Korea
| | - Hyo Jeong Kim
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107, Republic of Korea.
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Jung H, Shin G, Kwak H, Hao LT, Jegal J, Kim HJ, Jeon H, Park J, Oh DX. Review of polymer technologies for improving the recycling and upcycling efficiency of plastic waste. Chemosphere 2023; 320:138089. [PMID: 36754297 DOI: 10.1016/j.chemosphere.2023.138089] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 02/02/2023] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Human society has become increasingly reliant on plastic because it allows for convenient and sanitary living. However, recycling rates are currently low, which means that the majority of plastic waste ends up in landfills or the ocean. Increasing recycling and upcycling rates is a critical strategy for addressing the issues caused by plastic pollution, but there are several technical limitations to overcome. This article reviews advancements in polymer technology that aim to improve the efficiency of recycling and upcycling plastic waste. In food packaging, natural polymers with excellent gas barrier properties and self-cleaning abilities have been introduced as environmentally friendly alternatives to existing materials and to reduce food-derived contamination. Upcycling and valorization approaches have emerged to transform plastic waste into high-value-added products. Recent advancements in the development of recyclable high-performance plastics include the design of super engineering thermoplastics and engineering chemical bonds of thermosets to make them recyclable and biodegradable. Further research is needed to develop more cost-effective and scalable technologies to address the plastic pollution problem through sustainable recycling and upcycling.
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Affiliation(s)
- Hyuni Jung
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Giyoung Shin
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hojung Kwak
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Lam Tan Hao
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Jonggeon Jegal
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyo Jeong Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107, Republic of Korea.
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
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Lee S, Hao LT, Park J, Oh DX, Hwang DS. Nanochitin and Nanochitosan: Chitin Nanostructure Engineering with Multiscale Properties for Biomedical and Environmental Applications. Adv Mater 2023; 35:e2203325. [PMID: 35639091 DOI: 10.1002/adma.202203325] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/24/2022] [Indexed: 06/15/2023]
Abstract
Nanochitin and nanochitosan (with random-copolymer-based multiscale architectures of glucosamine and N-acetylglucosamine units) have recently attracted immense attention for the development of green, sustainable, and advanced functional materials. Nanochitin and nanochitosan are multiscale materials from small oligomers, rod-shaped nanocrystals, longer nanofibers, to hierarchical assemblies of nanofibers. Various physical properties of chitin and chitosan depend on their molecular- and nanostructures; translational research has utilized them for a wide range of applications (biomedical, industrial, environmental, and so on). Instead of reviewing the entire extensive literature on chitin and chitosan, here, recent developments in multiscale-dependent material properties and their applications are highlighted; immune, medical, reinforcing, adhesive, green electrochemical materials, biological scaffolds, and sustainable food packaging are discussed considering the size, shape, and assembly of chitin nanostructures. In summary, new perspectives for the development of sustainable advanced functional materials based on nanochitin and nanochitosan by understanding and engineering their multiscale properties are described.
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Affiliation(s)
- Suyoung Lee
- Division of Environmental Science and Engineering, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Pohang, 37673, Republic of Korea
| | - Lam Tan Hao
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Jeyoung Park
- Division of Environmental Science and Engineering, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Pohang, 37673, Republic of Korea
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Dong Soo Hwang
- Division of Environmental Science and Engineering, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Pohang, 37673, Republic of Korea
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10
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Kwak H, Kim H, Park S, Lee M, Jang M, Park SB, Hwang SY, Kim HJ, Jeon H, Koo JM, Park J, Oh DX. Biodegradable, Water-Resistant, Anti-Fizzing, Polyester Nanocellulose Composite Paper Straws. Adv Sci (Weinh) 2022; 10:e2205554. [PMID: 36403230 PMCID: PMC9811439 DOI: 10.1002/advs.202205554] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Among plastic items, single-use straws are particularly detrimental to marine ecosystems because such straws, including those made of poly(lactic acid) (PLA), are sharp and extremely slowly degradable in the ocean. While paper straws are promising alternatives, they exhibit hydration-induced swelling even when coated with a non-degradable plastic coating and promote effervescence (fizzing) in soft drinks owing to their surface heterogeneities. In this study, upgraded paper straw is coated with poly(butylene succinate) cellulose nanocrystal (PBS/CNC) composites. CNC increases adhesion to paper owing to their similar chemical structures, optimizes crystalline PBS spherulites through effective nucleation, and reinforces the matrix through its anisotropic and rigid features. The straws are not only anti-fizzing when used with soft drinks owing to their homogeneous and seamless surface coatings, but also highly water-resistant and tough owing to their watertight surfaces. All degradable components effectively decompose under aerobic composting and in the marine environment. This technology contributes to United Nations Sustainable Development Goal 14 (Life Below Water).
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Affiliation(s)
- Hojung Kwak
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Hyeri Kim
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Seul‐A Park
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Minkyung Lee
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Min Jang
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Sung Bae Park
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Sung Yeon Hwang
- Department of Plant and Environmental New ResourcesKyung Hee UniversityYongin17104Republic of Korea
| | - Hyo Jeong Kim
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Jun Mo Koo
- Department of Organic Materials EngineeringChungnam National UniversityDaejeon34134Republic of Korea
| | - Jeyoung Park
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
- Department of Chemical and Biomolecular EngineeringSogang UniversitySeoul04107Republic of Korea
| | - Dongyeop X. Oh
- Research Center for Bio‐based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
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11
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Jang M, Yang H, Park SA, Sung HK, Koo JM, Hwang SY, Jeon H, Oh DX, Park J. Analysis of volatile organic compounds produced during incineration of non-degradable and biodegradable plastics. Chemosphere 2022; 303:134946. [PMID: 35569634 DOI: 10.1016/j.chemosphere.2022.134946] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 05/04/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
As plastic consumption has increased, environmental problems associated with the accumulation of plastic wastes have started to emerge. These include the non-degradability of plastic and its disintegration into sub-micron particles. Although some biodegradable plastic products have been developed to relieve the landfill and leakage burden, a significant portion of discarded plastics are inevitably still incinerated. The concern here is that incinerating plastics may result in the emission of toxic volatile organic compounds (VOCs). Moreover, lack of policy and the limited market share contributes to the indiscriminate discarding of biodegradable plastics, whereby it is mixed and subsequently incinerated with non-degradable plastics. The aim of this study was therefore to qualitatively and quantitatively analyze the VOCs emitted from both non-degradable and biodegradable plastics during combustion employing gas chromatography mass spectrometry. Here, non-degradable poly(vinyl chloride) and poly(ethylene terephthalate) emitted 10-115 and 6-22 ppmv of VOCs, respectively. These emission levels were more than 100 times higher than the VOC concentrations of 0.1-0.5 and 0.1-1.8 ppmv obtained for biodegradable polyhydroxyalkanoate and polylactic acid, respectively. Notably, due to the presence of a repeating butylene group in both non-degradable and biodegradable plastics, 1,3-butadiene accounted for the highest concentration among the VOCs identified, with concentrations of 6-116 ppmv and 0.5-558 ppmv obtained, respectively. During the evaluation of gas barrier films employed for food packaging purposes, non-degradable aluminum-coated multilayered films emitted 9-515 ppmv of VOCs, compared to the 2-41 ppmv VOCs emitted by biodegradable nanocellulose/nanochitin-coated films. Despite the significantly lower levels of VOCs emitted during the incineration of biodegradable plastics, this does not represent suitable waste treatment solution because VOCs are still emitted during incomplete combustion. This study aims to encourage further research into diverse combustion conditions for plastics and stimulate discussions on the fate of discarded plastics.
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Affiliation(s)
- Min Jang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyemin Yang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Seul-A Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hye Kyeong Sung
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea.
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
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12
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Jang M, Yang H, Lee H, Lee KS, Oh JY, Jeon H, Ok YS, Hwang SY, Park J, Oh DX. A sensitive environmental forensic method that determines bisphenol S and A exposure within receipt-handling through fingerprint analysis. J Hazard Mater 2022; 424:127410. [PMID: 34634704 DOI: 10.1016/j.jhazmat.2021.127410] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 06/28/2021] [Accepted: 09/29/2021] [Indexed: 06/13/2023]
Abstract
As human beings have been consistently exposed to bisphenol A (BPA) and bisphenol S (BPS) derived from various products, the intake of BPS/BPA to humans has been extensively studied. However, using conventional biological matrices such as urine, blood, or dissected skin to detect BPS/BPA in the human body system requires longer exposure time to them, hardly defines the pollutant source of the accumulated BPS/BPA, and is often invasive. Herein, our new approach i.e. fingerprint analysis quantitatively confirms the transfer of BPS/BPA from receipts (specific pollution source) to human skin only within receipt-handling of "20 s". When receipts (fingertip region size; ~1 cm2) containing 100-300 μg of BPS or BPA are handled, 20-40 μg fingerprint-1 of BPS or BPA is transferred to human skin (fingertip). This transferred amount of BPS/BPA can still be toxic according to the toxicity test using water fleas. As a visual evidence, a fingerprint map that matches the distribution of the absorbed BPS/BPA is developed using a mass spectrometry imaging tool. This is the first study to analyze fingerprints to determine the incorporation mechanism of emerging pollutants. This study provides an efficient and non-invasive environmental forensic tool to analyze amounts and sources of hazardous substances.
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Affiliation(s)
- Min Jang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Hyemin Yang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Huichan Lee
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Kwang Seon Lee
- Applied Surface Technology Ascend (ASTA), Suwon-si, Gyeonggi-do, 16229, Republic of Korea
| | - Joo Yeon Oh
- Applied Surface Technology Ascend (ASTA), Suwon-si, Gyeonggi-do, 16229, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Yong Sik Ok
- Korea Biochar Research Center, APRU Sustainable Waste Management Program, & Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
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13
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Jang M, Yang H, Shin G, Koo JM, Hwang SY, Park J, X. Oh D. Determination of Methanol in Commercialized Alcohol-based Hand Sanitizing and Other Similar Products using Headspace GC-MS. CURR ANAL CHEM 2022. [DOI: 10.2174/1573411018666220107145321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Demand for alcohol-based products, including gel- and aqueous-type hand sanitizers, room sprays, and mouthwashes, has sharply increased during the ongoing COVID-19 pandemic because of their microbicidal properties. However, toxic methanol can be found from intentional addition of methanol by manufacturers and invariable production during the manufacture alcohol (ethanol). Although the FDA has recommended that such products should contain less than 630 ppm of methanol, it is only a temporary measure established specifically to regulate such products during the current COVID-19 pandemic and hence is not strictly regulated.
Objective:
This study aims to detect and quantify the level of methanol in alcohol-based products. However, some manufacturers unethically add methanol in their products and promote them as methanol-free. Besides, they do not provide proficiency and toxicity test results. Therefore, these kinds of products need to be analyzed to determine if they are acceptable to use.
Method:
This study qualitatively and quantitatively investigates the amount of methanol in commercial alcohol-based products using a newly developed headspace gas chromatography/mass spectrometry method. Moreover, alcohol beverages which contain methanol were analyzed to be compared with the levels of methanol in alcohol-based products and determine if their methanol levels are acceptable.
Results:
Methanol concentrations in gel-type hand sanitizers (517 ppm) and mouthwashes (202 ppm) were similar to those in white wine (429 ppm) and beer (256 ppm), respectively, while that of aqueous-type hand sanitizers (1139 ppm) is 1.5 times more than that of red wine (751 ppm).
Conclusion:
Methanol levels in most of the alcohol-based products did not exceed the FDA-recommended limit.
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Affiliation(s)
- Min Jang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Hyemin Yang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Giyoung Shin
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
| | - Dongyeop X. Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44425, Republic of Korea
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14
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Kim HT, Hee Ryu M, Jung YJ, Lim S, Song HM, Park J, Hwang SY, Lee H, Yeon YJ, Sung BH, Bornscheuer UT, Park SJ, Joo JC, Oh DX. Chemo-Biological Upcycling of Poly(ethylene terephthalate) to Multifunctional Coating Materials. ChemSusChem 2021; 14:4251-4259. [PMID: 34339110 PMCID: PMC8519047 DOI: 10.1002/cssc.202100909] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/30/2021] [Indexed: 05/13/2023]
Abstract
Chemo-biological upcycling of poly(ethylene terephthalate) (PET) developed in this study includes the following key steps: chemo-enzymatic PET depolymerization, biotransformation of terephthalic acid (TPA) into catechol, and its application as a coating agent. Monomeric units were first produced through PET glycolysis into bis(2-hydroxyethyl) terephthalate (BHET), mono(2-hydroxyethyl) terephthalate (MHET), and PET oligomers, and enzymatic hydrolysis of these glycolyzed products using Bacillus subtilis esterase (Bs2Est). Bs2Est efficiently hydrolyzed glycolyzed products into TPA as a key enzyme for chemo-enzymatic depolymerization. Furthermore, catechol solution produced from TPA via a whole-cell biotransformation (Escherichia coli) could be directly used for functional coating on various substrates after simple cell removal from the culture medium without further purification and water-evaporation. This work demonstrates a proof-of-concept of a PET upcycling strategy via a combination of chemo-biological conversion of PET waste into multifunctional coating materials.
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Affiliation(s)
- Hee Taek Kim
- Department of Food Science and TechnologyChungnam National UniversityDaejeon34134 (Republic ofKorea
| | - Mi Hee Ryu
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
| | - Ye Jean Jung
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
| | - Sooyoung Lim
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
| | - Hye Min Song
- Department of Chemical Engineering and Materials ScienceGraduate Program in System Health Science & EngineeringEwha Womans UniversitySeoul03760 (Republic ofKorea
| | - Jeyoung Park
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113 (Republic ofKorea
| | - Sung Yeon Hwang
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113 (Republic ofKorea
| | - Hoe‐Suk Lee
- Department of Biochemical EngineeringGangneung-Wonju National UniversityGangneung-siGangwon-do25457 (Republic ofKorea
| | - Young Joo Yeon
- Department of Biochemical EngineeringGangneung-Wonju National UniversityGangneung-siGangwon-do25457 (Republic ofKorea
| | - Bong Hyun Sung
- Synthetic Biology and Bioengineering Research CenterKorea Research Institute of Bioscience and BiotechnologyDaejeon34141 (Republic ofKorea
| | - Uwe T. Bornscheuer
- Department of Biotechnology & Enzyme CatalysisInstitute of BiochemistryUniversity of Greifswald17487GreifswaldGermany
| | - Si Jae Park
- Department of Chemical Engineering and Materials ScienceGraduate Program in System Health Science & EngineeringEwha Womans UniversitySeoul03760 (Republic ofKorea
| | - Jeong Chan Joo
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
- Department of BiotechnologyThe Catholic University of KoreaBucheon-siGyeonggi-do14662 (Republic ofKorea
| | - Dongyeop X. Oh
- Research Center for Bio-based ChemicalsKorea Research Institute of Chemical TechnologyDaejeon34114 & Ulsan 44429 (Republic ofKorea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113 (Republic ofKorea
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15
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Hao LT, Park S, Choy S, Kim YM, Lee SW, Ok YS, Koo JM, Hwang SY, Hwang DS, Park J, Oh DX. Strong, Multifaceted Guanidinium-Based Adhesion of Bioorganic Nanoparticles to Wet Biological Tissue. JACS Au 2021; 1:1399-1411. [PMID: 34604850 PMCID: PMC8479763 DOI: 10.1021/jacsau.1c00193] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Indexed: 06/13/2023]
Abstract
Gluing dynamic, wet biological tissue is important in injury treatment yet difficult to achieve. Polymeric adhesives are inconvenient to handle due to rapid cross-linking and can raise biocompatibility concerns. Inorganic nanoparticles adhere weakly to wet surfaces. Herein, an aqueous suspension of guanidinium-functionalized chitin nanoparticles as a biomedical adhesive with biocompatible, hemostatic, and antibacterial properties is developed. It glues porcine skin up to 3000-fold more strongly (30 kPa) than inorganic nanoparticles at the same concentration and adheres at neutral pH, which is unachievable with mussel-inspired adhesives alone. The glue exhibits an instant adhesion (2 min) to fully wet surfaces, and the glued assembly endures one-week underwater immersion. The suspension is lowly viscous and stable, hence sprayable and convenient to store. A nanomechanic study reveals that guanidinium moieties are chaotropic, creating strong, multifaceted noncovalent bonds with proteins: salt bridges comprising ionic attraction and bidentate hydrogen bonding with acidic moieties, cation-π interactions with aromatic moieties, and hydrophobic interactions. The adhesion mechanism provides a blueprint for advanced tissue adhesives.
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Affiliation(s)
- Lam Tan Hao
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
- Advanced
Materials and Chemical Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
| | - Sohee Park
- Division
of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Seunghwan Choy
- Biomedical
Institute for Convergence, Sungkyunkwan
University, Suwon 16419, Republic of Korea
| | - Young-Min Kim
- Division
of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Seung-Woo Lee
- Division
of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Department
of Life Sciences, Pohang University of Science
and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Yong Sik Ok
- Korea
Biochar Research Center, APRU Sustainable Waste Management Program,
Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic
of Korea
| | - Jun Mo Koo
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
| | - Sung Yeon Hwang
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
- Advanced
Materials and Chemical Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
| | - Dong Soo Hwang
- Division
of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Jeyoung Park
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
- Advanced
Materials and Chemical Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
| | - Dongyeop X. Oh
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
- Advanced
Materials and Chemical Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
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16
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Shin G, Jeong DW, Kim H, Park SA, Kim S, Lee JY, Hwang SY, Park J, Oh DX. Biosynthesis of Polyhydroxybutyrate with Cellulose Nanocrystals Using Cupriavidus necator. Polymers (Basel) 2021; 13:2604. [PMID: 34451143 PMCID: PMC8398664 DOI: 10.3390/polym13162604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 11/16/2022] Open
Abstract
Polyhydroxybutyrate (PHB) is a natural polyester synthesized by several microorganisms. Moreover, it has excellent biodegradability and is an eco-friendly material because it converts water and carbon dioxide as final decomposition products. However, the applications of PHB are limited because of its stiffness and brittleness. Because cellulose nanocrystals (CNCs) have excellent intrinsic mechanical properties such as high specific strength and modulus, they may compensate for the insufficient physical properties of PHB by producing their nanocomposites. In this study, natural polyesters were extracted from Cupriavidus necator fermentation with CNCs, which were well-dispersed in nitrogen-limited liquid culture media. Fourier-transform infrared spectroscopy results revealed that the additional O-H peak originating from cellulose at 3500-3200 cm-1 was observed for PHB along with the C=O and -COO bands at 1720 cm-1. This suggests that PHB-CNC nanocomposites could be readily obtained using C. necator fermented in well-dispersed CNC-supplemented culture media.
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Affiliation(s)
- Giyoung Shin
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Da-Woon Jeong
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Hyeri Kim
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Seul-A Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Semin Kim
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Ju Young Lee
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea
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17
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Shin M, Shin SH, Lee M, Kim HJ, Jeong JH, Choi YH, Oh DX, Park J, Jeon H, Eom Y. Rheological criteria for distinguishing self-healing and non-self-healing hydrogels. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123969] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Nguyen HL, Tran TH, Hao LT, Jeon H, Koo JM, Shin G, Hwang DS, Hwang SY, Park J, Oh DX. Biorenewable, transparent, and oxygen/moisture barrier nanocellulose/nanochitin-based coating on polypropylene for food packaging applications. Carbohydr Polym 2021; 271:118421. [PMID: 34364562 DOI: 10.1016/j.carbpol.2021.118421] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/20/2021] [Accepted: 07/06/2021] [Indexed: 12/14/2022]
Abstract
Aluminum-coated polypropylene films are commonly used in food packaging because aluminum is a great gas barrier. However, recycling these films is not economically feasible. In addition, their end-of-life incineration generates harmful alumina-based particulate matter. In this study, coating layers with excellent gas-barrier properties are assembled on polypropylene films through layer-by-layer (LbL) deposition of biorenewable nanocellulose and nanochitin. The coating layers significantly reduce the transmission of oxygen and water vapors, two unfavorable gases for food packaging, through polypropylene films. The oxygen transmission rate of a 60 μm-thick, 20 LbL-coated polypropylene film decreases by approximately a hundredfold, from 1118 to 13.10 cc m-2 day-1 owing to the high crystallinity of nanocellulose and nanochitin. Its water vapor transmission rate slightly reduces from 2.43 to 2.13 g m-2 day-1. Furthermore, the coated film is highly transparent, unfavorable to bacterial adhesion and thermally recyclable, thus promising for advanced food packaging applications.
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Affiliation(s)
- Hoang-Linh Nguyen
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Division of Environmental Science & Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Thang Hong Tran
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Lam Tan Hao
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Giyoung Shin
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Dong Soo Hwang
- Division of Environmental Science & Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea.
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
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Hao LT, Lee M, Jeon H, Koo JM, Hwang SY, Oh DX, Park J. Tamper-Proof Time-Temperature Indicator for Inspecting Ultracold Supply Chain. ACS Omega 2021; 6:8598-8604. [PMID: 33817520 PMCID: PMC8015080 DOI: 10.1021/acsomega.1c00404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 02/26/2021] [Indexed: 05/12/2023]
Abstract
In the precarious situation caused by the COVID-19 pandemic, the use of messenger ribonucleic acid (mRNA) vaccines is promising for prevention against the infection. However, this type of vaccine has not been effectively commercialized because it needs to be stored and transported at ultracold conditions. mRNA vaccines exposed to undesired temperatures may not show any visible changes but can deteriorate and cause negative effects. Consumers' demand for vaccine authenticity requires logistics to develop a robust monitoring tool to ensure the integrity of ultracold supply chain from manufacturing until vaccination. Here, we report a time-temperature indicator (TTI) that can detect a relatively small change in temperature within subzero ranges, for example, from -70 to -60 °C, which cannot be achieved by current TTIs operating at room temperature. A dyed noneutectic ethylene glycol/water mixture that melts near the mRNA conservation temperature (-69 °C) diffuses into a white absorbent and leaves a colored trace. In addition, the heterogeneous ice particles in the noneutectic mobile phase can prevent absorption during short-term exposure to room temperature. Therefore, the proposed TTI will not record inevitable "meaningless" short-term exposure to room temperature during the cold supply chain but monitor the "meaningful" relatively long-term exposure above -60 °C. These findings help facilitate the safe distribution of the COVID-19 mRNA vaccines.
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Affiliation(s)
- Lam Tan Hao
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
- Advanced
Materials and Chemical Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
| | - Minkyung Lee
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
| | - Hyeonyeol Jeon
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
| | - Jun Mo Koo
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
| | - Sung Yeon Hwang
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
- Advanced
Materials and Chemical Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
- . Tel.: +82-52-241-6313. Fax: +82-52-241-6349
| | - Dongyeop X. Oh
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
- Advanced
Materials and Chemical Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
- . Tel.: +82-52-241-6316. Fax: +82-52-241-6349
| | - Jeyoung Park
- Research
Center for Bio-based Chemistry, Korea Research
Institute of Chemical Technology (KRICT), Ulsan 44429, Republic
of Korea
- Advanced
Materials and Chemical Engineering, University
of Science and Technology (UST), Daejeon 34113, Republic
of Korea
- . Tel.: +82-52-241-6315. Fax: +82-52-241-6349
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20
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Choi S, Jeon H, Jang M, Kim H, Shin G, Koo JM, Lee M, Sung HK, Eom Y, Yang H, Jegal J, Park J, Oh DX, Hwang SY. Biodegradable, Efficient, and Breathable Multi-Use Face Mask Filter. Adv Sci (Weinh) 2021; 8:2003155. [PMID: 33747729 PMCID: PMC7967051 DOI: 10.1002/advs.202003155] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/19/2020] [Indexed: 05/19/2023]
Abstract
The demand for face masks is increasing exponentially due to the coronavirus pandemic and issues associated with airborne particulate matter (PM). However, both conventional electrostatic- and nanosieve-based mask filters are single-use and are not degradable or recyclable, which creates serious waste problems. In addition, the former loses function under humid conditions, while the latter operates with a significant air-pressure drop and suffers from relatively fast pore blockage. Herein, a biodegradable, moisture-resistant, highly breathable, and high-performance fibrous mask filter is developed. Briefly, two biodegradable microfiber and nanofiber mats are integrated into a Janus membrane filter and then coated by cationically charged chitosan nanowhiskers. This filter is as efficient as the commercial N95 filter and removes 98.3% of 2.5 µm PM. The nanofiber physically sieves fine PM and the microfiber provides a low pressure differential of 59 Pa, which is comfortable for human breathing. In contrast to the dramatic performance decline of the commercial N95 filter when exposed to moisture, this filter exhibits negligible performance loss and is therefore multi-usable because the permanent dipoles of the chitosan adsorb ultrafine PM (e.g., nitrogen and sulfur oxides). Importantly, this filter completely decomposes within 4 weeks in composting soil.
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Affiliation(s)
- Sejin Choi
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Min Jang
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Hyeri Kim
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Giyoung Shin
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Minkyung Lee
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Hye Kyeong Sung
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Youngho Eom
- Department of Polymer EngineeringPukyong National UniversityBusan48513Republic of Korea
| | - Ho‐Sung Yang
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Jonggeon Jegal
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
| | - Jeyoung Park
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113Republic of Korea
| | - Dongyeop X. Oh
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio‐Based ChemistryKorea Research Institute of Chemical Technology (KRICT)Ulsan44429Republic of Korea
- Advanced Materials and Chemical EngineeringUniversity of Science and Technology (UST)Daejeon34113Republic of Korea
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21
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Yang HS, Cho S, Eom Y, Park SA, Hwang SY, Jeon H, Oh DX, Park J. Preparation of Self-Healable and Spinnable Hydrogel by Dynamic Boronate Ester Bond from Hyperbranched Polyglycerol and Boronic Acid-Containing Polymer. Macromol Res 2021. [DOI: 10.1007/s13233-021-9016-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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22
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Kim H, Shin MS, Jeon H, Koo JM, Eom Y, Choi S, Shin G, Oh DX, Hwang SY, Park J. Highly reinforced poly(butylene succinate) nanocomposites prepared from chitosan nanowhiskers by in-situ polymerization. Int J Biol Macromol 2021; 173:128-135. [PMID: 33476620 DOI: 10.1016/j.ijbiomac.2021.01.102] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/12/2021] [Accepted: 01/15/2021] [Indexed: 12/19/2022]
Abstract
Biodegradable aliphatic polyesters need to be tough for commodity-plastic applications, such as disposable bags. Herein, we show that chitosan nanowhiskers (CsWs) prepared from naturally abundant chitin is an effective nanofiller that reinforces the strength and toughness of poly(butylene succinate) (PBS). In-situ polycondensation of an aqueous solution of processed CsWs led to a PBS nanocomposite with the highest tensile strength (77 MPa) and elongation at break (530%) reported to date for all PBS types at a minimal nanofiller content of 0.2 wt%. The observed 3.2-fold increase in toughness of the CsW/PBS composite compared to neat PBS is superior to those of composites prepared using cellulose nanocrystals, chitin nanowhiskers, and unstably dispersed CsWs in 1,4-butanediol monomer. Interestingly, CsWs efficiently overcome the disadvantages of the PBS film that easily tears. The highly polar surfaces of the CsWs strongly bind to polymer chains and promote a fibrillar and micro-void structure, thereby maximizing the chain-holding ability of the nanofiller, which resists external tensile and tear stress. This sustainable all-organic nanocomposite is a promising candidate for biodegradable disposable commodities.
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Affiliation(s)
- Hyeri Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Myung Suk Shin
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Youngho Eom
- Department of Polymer Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Sejin Choi
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Giyoung Shin
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
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23
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Shin S, Eom Y, Lee ES, Hwang SY, Oh DX, Park J. Malleable Hydrogels: Malleable Hydrogel Embedded with Micellar Cargo‐Expellers as a Prompt Transdermal Patch (Adv. Healthcare Mater. 19/2020). Adv Healthc Mater 2020. [DOI: 10.1002/adhm.202070072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Shin S, Eom Y, Lee ES, Hwang SY, Oh DX, Park J. Malleable Hydrogel Embedded with Micellar Cargo-Expellers as a Prompt Transdermal Patch. Adv Healthc Mater 2020; 9:e2000876. [PMID: 32902150 DOI: 10.1002/adhm.202000876] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Indexed: 11/08/2022]
Abstract
Although hydrogels are promising transdermal patches, they face spatiotemporal problems related to controlled drug release. From the "spatio" perspective, hydrogels are not malleable, therefore they do not fully contact curved skin, such as that found on the nose and fingers. From the "temporal" perspective, the internal network of a hydrogel retards cargo release. Herein, a malleable and rapid-cargo-releasing poly(vinyl alcohol)-borax hydrogel that embeds freely mobile poly(hydroxyethyl methacrylate) (PHEMA) micelles is prepared. The in situ polymerization of PHEMA within the matrix produces large compound micelle particles that are not bound by the matrix. The micelles act as expellers by sweeping out cargo upon exposure to wet conditions through a concentration gradient. The hydrogel embedded with the micellar cargo-expellers delivers a 25-fold larger 3-min release quantity of Nile Red (a model cargo) than the control hydrogel. The particles absorb mechanical shocks and the dynamic borate-diol bonds engender the hydrogel with self-healing properties, which results in a hydrogel that tightly contacts highly curved skin. Moreover, the hydrogel shows no toxicity in in vivo and skin irritation tests. This malleable hydrogel will inspire novel prompt skin-patch systems for pharmaceutical and cosmetics purposes.
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Affiliation(s)
- Sung‐Ho Shin
- Research Center for Bio‐based Chemistry Korea Research Institute of Chemical Technology (KRICT) Ulsan 44429 Republic of Korea
| | - Youngho Eom
- Department of Polymer Engineering Pukyong National University Busan 48513 Republic of Korea
| | - Eun Seong Lee
- Department of Biotechnology The Catholic University of Korea Bucheon Gyeonggi‐do 14662 Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio‐based Chemistry Korea Research Institute of Chemical Technology (KRICT) Ulsan 44429 Republic of Korea
- Advanced Materials and Chemical Engineering University of Science and Technology (UST) Daejeon 34113 Republic of Korea
| | - Dongyeop X. Oh
- Research Center for Bio‐based Chemistry Korea Research Institute of Chemical Technology (KRICT) Ulsan 44429 Republic of Korea
- Advanced Materials and Chemical Engineering University of Science and Technology (UST) Daejeon 34113 Republic of Korea
| | - Jeyoung Park
- Research Center for Bio‐based Chemistry Korea Research Institute of Chemical Technology (KRICT) Ulsan 44429 Republic of Korea
- Advanced Materials and Chemical Engineering University of Science and Technology (UST) Daejeon 34113 Republic of Korea
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25
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Choy S, Moon H, Park Y, Jung YM, Koo JM, Oh DX, Hwang DS. Mechanical properties and thermal stability of intermolecular-fitted poly(vinyl alcohol)/α-chitin nanofibrous mat. Carbohydr Polym 2020; 244:116476. [DOI: 10.1016/j.carbpol.2020.116476] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 05/13/2020] [Accepted: 05/17/2020] [Indexed: 10/24/2022]
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26
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Park SA, Eom Y, Jeon H, Koo JM, Kim T, Jeon J, Park MJ, Hwang SY, Kim BS, Oh DX, Park J. Aramid Nanofiber Templated In Situ S NAr Polymerization for Maximizing the Performance of All-Organic Nanocomposites. ACS Macro Lett 2020; 9:558-564. [PMID: 35648512 DOI: 10.1021/acsmacrolett.0c00156] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The performance limits of conventional super engineering plastics with inorganic nanofillers are surpassed by all-organic nanocomposites prepared via in situ SNAr polymerization of polysulfone (PSU) in the presence of a highly dispersed aramid nanofiber (ANF) solution. The latter is directly used, bypassing the energy-consuming, nanostructure-damaging workup process. Using only a 0.15 wt % nanofiller, the all-organic nanocomposite shows an ultimate tensile strength 1.6× higher and 3.4× tougher than neat PSU and its blending counterpart due to the mutually interactive filler and maximally homogenized matrix. The exceptional toughness of the ANF/PSU nanocomposite originates from the grafted PSU on the surface of ANF; it drives stress-delocalized deformation, as revealed by stress-absorbable viscoelastic behavior and ductile elongation of materials. This material is a promising candidate for use as a filler-interactive, high-performance nanocomposite.
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Affiliation(s)
- Seul-A Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Youngho Eom
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
- Department of Polymer Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Taehyung Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
- Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jaemin Jeon
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Moon Jeong Park
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Ulsan 44429, Republic of Korea
| | - Byeong-Su Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Dongyeop X. Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Ulsan 44429, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Ulsan 44429, Republic of Korea
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27
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Choi S, Eom Y, Kim SM, Jeong DW, Han J, Koo JM, Hwang SY, Park J, Oh DX. A Self-Healing Nanofiber-Based Self-Responsive Time-Temperature Indicator for Securing a Cold-Supply Chain. Adv Mater 2020; 32:e1907064. [PMID: 32022987 DOI: 10.1002/adma.201907064] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/17/2019] [Indexed: 05/15/2023]
Abstract
Perishable foods at undesired temperatures can generate foodborne illnesses that present significant societal costs. To certify refrigeration succession in a food-supply chain, a flexible, easy-to-interpret, damage-tolerant, and sensitive time-temperature indicator (TTI) that uses a self-healing nanofiber mat is devised. This mat is opaque when refrigerated due to nanofiber-induced light scattering, but becomes irreversibly transparent at room temperature through self-healing-induced interfibrillar fusion leading to the appearance of a warning sign. The mat monitors both freezer (-20 °C) and chiller (2 °C) successions and its timer is tunable over the 0.5-22.5 h range through control of the polymer composition and film thickness. The thin mat itself serves as both a temperature sensor and display; it does not require modularization, accurately measures localized or gradient heat, and functions even after crushing, cutting, and when weight-loaded in a manner that existing TTIs cannot. It also contains no drainable chemicals and is attachable to various shapes because it operates through an intrinsic physical response.
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Affiliation(s)
- Sejin Choi
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Youngho Eom
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Department of Polymer Engineering, Pukyong National University, Busan, 48513, Republic of Korea
| | - Seon-Mi Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Da-Woon Jeong
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Jongmin Han
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
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28
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Hao LT, Eom Y, Tran TH, Koo JM, Jegal J, Hwang SY, Oh DX, Park J. Rediscovery of nylon upgraded by interactive biorenewable nano-fillers. Nanoscale 2020; 12:2393-2405. [PMID: 31742304 DOI: 10.1039/c9nr08091k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Inorganic nanomaterials can only stiffen nylon with a significant loss of its toughness and ductility. Furthermore, they are not eco-friendly. In this study, the facile tuning of nylon's mechanical properties from stiff to tough was achieved, using cellulose nanocrystals (CNC) and chitosan nanowhiskers (CSW) as biorenewable fillers. The interaction between the matrix and filler was controlled by varying the types of fillers and the employed processing methods, including in situ interfacial polymerization and post-solution blending. Particularly with CSW, the in situ-incorporated filler with a 0.4 wt% loading strengthened nylon and led to a 1.9-fold increase in its Young's modulus (2.6 GPa) and a 1.7-fold increase in its ultimate tensile strength (106 MPa), whereas the solution-blended filler with a 0.3 wt% loading toughened the polymer with a 2.1-fold increase (104 MJ m-3). Compared with inorganic nanocomposites, these interactive biofiller-nanocomposites are unrivaled in their reinforcing performance when normalized by filler content. This stiff-to-tough tuning trend is more pronounced in the CSW system than in the CNC system. Covalent polymer grafts on the amine surface of CSW enhanced interfacial interactions in the in situ method, whereas its cationic surface charges plasticized the polymer matrix in the blending method. This proteinaceous composite-mimicking all-organic nylon nanocomposite opens new possibilities in the field of reinforced engineering plastics.
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Affiliation(s)
- Lam Tan Hao
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Youngho Eom
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Department of Polymer Engineering, Pukyong National University, Busan, 48513, Republic of Korea
| | - Thang Hong Tran
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea.
| | - Jonggeon Jegal
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea.
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea. and Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
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29
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Yoon JH, Kim SM, Park HJ, Kim YK, Oh DX, Cho HW, Lee KG, Hwang SY, Park J, Choi BG. Highly self-healable and flexible cable-type pH sensors for real-time monitoring of human fluids. Biosens Bioelectron 2019; 150:111946. [PMID: 31929084 DOI: 10.1016/j.bios.2019.111946] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/20/2019] [Accepted: 11/30/2019] [Indexed: 11/18/2022]
Abstract
Development of sensing technology with wearable chemical sensors is realizing non-invasive, real-time monitoring healthcare and disease diagnostics. The advanced sensor devices should be compact and portable for use in limited space, easy to wear on human body, and low-cost for personalized healthcare markets. Here, we report a highly sensitive, flexible, and autonomously self-healable pH sensor cable developed by weaving together two carbon fiber thread electrodes coated with mechanically robust self-healing polymers. The pH sensor cable showed excellent electrochemical performances of sensitivity, repeatability, and durability. Spontaneous and autonomous sensor healing efficiency of the pH sensor cable was demonstrated by measuring sensitivity during four cycles of cutting and healing process. The pH sensor cable could measure pH in small volumes of real human fluid samples, including urine, saliva, and sweat, and the results were similar to those of a commercial pH meter. Taken together, successful real-time pH monitoring for human sweat was demonstrated by fabricating a wearable sensing system in which the pH sensor cable was knitted into a headband integrated with wireless electronics.
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Affiliation(s)
- Jo Hee Yoon
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do, 25913, Republic of Korea
| | - Seon-Mi Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hong Jun Park
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do, 25913, Republic of Korea
| | - Yeong Kyun Kim
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do, 25913, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Han-Won Cho
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Kyoung G Lee
- Nano-Bio Application Team, National Nanofab Center, Daejeon, 34141, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
| | - Bong Gill Choi
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do, 25913, Republic of Korea.
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Nguyen HL, Ju S, Hao LT, Tran TH, Cha HG, Cha YJ, Park J, Hwang SY, Yoon DK, Hwang DS, Oh DX. The Renewable and Sustainable Conversion of Chitin into a Chiral Nitrogen-Doped Carbon-Sheath Nanofiber for Enantioselective Adsorption. ChemSusChem 2019; 12:3236-3242. [PMID: 31081284 DOI: 10.1002/cssc.201901176] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Indexed: 06/09/2023]
Abstract
Well-known hard-template methods for nitrogen (N)-doped chiral carbon nanomaterials require complicated construction and removal of the template, high-temperature pyrolysis, harsh chemical treatments, and additional N-doping processes. If naturally occurring chiral nematic chitin nanostructures [(C8 H13 NO5 )n ] in exoskeletons were wholly transformed into an N-doped carbon, this would be an efficient and sustainable method to obtain a useful chiral nanomaterial. Here, a simple, sacrificial-template-free, and environmentally mild method was developed to produce an N-doped chiral nematic carbon-sheath nanofibril hydrogel with a surface area >300 m2 g-1 and enantioselective properties from renewable chitin biomass. Calcium-saturated methanol physically exfoliated bulk chitin and produced a chiral nematic nanofibril hydrogel. Hydrothermal treatment of the chiral chitin hydrogel at 190 °C produced an N-doped chiral carbon-sheath nanofibril hydrogel without N-doping. This material preferentially adsorbed d-lactic acid over l-lactic acid and produced 16.3 % enantiomeric excess of l-lactic acid from a racemic mixture.
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Affiliation(s)
- Hoang-Linh Nguyen
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Sungbin Ju
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Lam Tan Hao
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Thang Hong Tran
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Hyun Gil Cha
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Yoon Jeong Cha
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
| | - Dong Ki Yoon
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea
- Department of Chemistry, KAIST, Daejeon, 305-701, Republic of Korea
| | - Dong Soo Hwang
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 305-333, Republic of Korea
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Park SA, Im C, Oh DX, Hwang SY, Jegal J, Kim JH, Chang YW, Jeon H, Park J. Study on the Synthetic Characteristics of Biomass-Derived Isosorbide-Based Poly(arylene ether ketone)s for Sustainable Super Engineering Plastic. Molecules 2019; 24:E2492. [PMID: 31288408 PMCID: PMC6651539 DOI: 10.3390/molecules24132492] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/02/2019] [Accepted: 07/07/2019] [Indexed: 11/16/2022] Open
Abstract
Demand for the development of novel polymers derived from biomass that can replace petroleum resources has been increasing. In this study, biomass-derived isosorbide was used as a monomer in the polymerization of poly(arylene ether ketone)s, and its synthetic characteristics were investigated. As a phase-transfer catalyst, crown ether has increased the weight-average molecular weight of polymers over 100 kg/mol by improving the reaction efficiency of isosorbide and minimizing the effect of moisture. By controlling the experimental parameters such as halogen monomer, polymerization solvent, time, and temperature, the optimal conditions were found to be fluorine-type monomer, dimethyl sulfoxide, 24 h, and 155 °C, respectively. Biomass contents from isosorbide-based polymers were determined by nuclear magnetic resonance and accelerator mass spectroscopy. The synthesized polymer resulted in a high molecular weight that enabled the preparation of transparent polymer films by the solution casting method despite its weak thermal degradation stability compared to aromatic polysulfone. The melt injection molding process was enabled by the addition of plasticizer. The tensile properties were comparable or superior to those of commercial petrochemical specimens of similar molecular weight. Interestingly, the prepared specimens exhibited a significantly lower coefficient of thermal expansion at high temperatures over 150 °C compared to polysulfone.
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Affiliation(s)
- Seul-A Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Changgyu Im
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Korea
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea
| | - Jonggeon Jegal
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Ji Hyeon Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Young-Wook Chang
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Korea.
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea.
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Park SA, Jeon H, Kim H, Shin SH, Choy S, Hwang DS, Koo JM, Jegal J, Hwang SY, Park J, Oh DX. Sustainable and recyclable super engineering thermoplastic from biorenewable monomer. Nat Commun 2019; 10:2601. [PMID: 31197142 PMCID: PMC6565616 DOI: 10.1038/s41467-019-10582-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 05/21/2019] [Indexed: 11/17/2022] Open
Abstract
Environmental and health concerns force the search for sustainable super engineering plastics (SEPs) that utilise bio-derived cyclic monomers, e.g. isosorbide instead of restricted petrochemicals. However, previously reported bio-derived thermosets or thermoplastics rarely offer thermal/mechanical properties, scalability, or recycling that match those of petrochemical SEPs. Here we use a phase transfer catalyst to synthesise an isosorbide-based polymer with a high molecular weight >100 kg mol-1, which is reproducible at a 1-kg-scale production. It is transparent and solvent/melt-processible for recycling, with a glass transition temperature of 212 °C, a tensile strength of 78 MPa, and a thermal expansion coefficient of 23.8 ppm K-1. Such a performance combination has not been reported before for bio-based thermoplastics, petrochemical SEPs, or thermosets. Interestingly, quantum chemical simulations show the alicyclic bicyclic ring structure of isosorbide imposes stronger geometric restraint to polymer chain than the aromatic group of bisphenol-A.
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Affiliation(s)
- Seul-A Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyungjun Kim
- Department of Chemistry, Incheon National University, Incheon, 22012, Republic of Korea
| | - Sung-Ho Shin
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Seunghwan Choy
- Devision of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Dong Soo Hwang
- Devision of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Jonggeon Jegal
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
| | - Dongyeop X Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea.
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Kim T, Tran TH, Hwang SY, Park J, Oh DX, Kim BS. Crab-on-a-Tree: All Biorenewable, Optical and Radio Frequency Transparent Barrier Nanocoating for Food Packaging. ACS Nano 2019; 13:3796-3805. [PMID: 30856331 DOI: 10.1021/acsnano.8b08522] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Plastic packaging effectively protects foods from mechanical, microbial, and chemical damage, but oxygen can still permeate these plastics, degrading foods. Improving the gas barrier usually requires metallic or halogenated polymeric coatings; however, both cause environmental concerns and metallic coatings block visible light and electromagnetic signals. This paper reports a design of a highly flexible, visible light and radio frequency transparent coating on commercial poly(ethylene terephthalate) (PET) film. Nanoscale blending was achieved between negatively charged cellulose nanofibers and positively charged chitin nanowhiskers by employing spray-assisted layer-by-layer assembly. Synergetic interplay between these highly crystalline nanomaterials results in a flexible film with superior barrier characteristics. The oxygen transmission rate was below 0.5 mL m-2 day-1. Moreover, this coating maintains its performance even when exposed to common hazards such as bending stress and hydration. The coating also notably reduces the haziness of PET with a negligible loss of transparency and provides effective inhibition of antibacterial growth. This "crab-on-a-tree" nanocoating holds high potential for biorenewable and optical and radio frequency transparent packaging applications.
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Affiliation(s)
- Taehyung Kim
- Department of Energy Engineering , Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil , Ulsan 44919 , Republic of Korea
| | - Thang Hong Tran
- Research Center for Bio-Based Chemistry , Korea Research Institute of Chemical Technology (KRICT) , Ulsan 44429 , Republic of Korea
- Advanced Materials and Chemical Engineering , University of Science and Technology (UST) , Daejeon 34113 , Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry , Korea Research Institute of Chemical Technology (KRICT) , Ulsan 44429 , Republic of Korea
- Advanced Materials and Chemical Engineering , University of Science and Technology (UST) , Daejeon 34113 , Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry , Korea Research Institute of Chemical Technology (KRICT) , Ulsan 44429 , Republic of Korea
- Advanced Materials and Chemical Engineering , University of Science and Technology (UST) , Daejeon 34113 , Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry , Korea Research Institute of Chemical Technology (KRICT) , Ulsan 44429 , Republic of Korea
- Advanced Materials and Chemical Engineering , University of Science and Technology (UST) , Daejeon 34113 , Republic of Korea
| | - Byeong-Su Kim
- Department of Chemistry , Yonsei University , Seoul 03722 , Republic of Korea
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Choy S, Oh DX, Lee S, Lam DV, You G, Ahn JS, Lee SW, Jun SH, Lee SM, Hwang DS. Tough and Immunosuppressive Titanium-Infiltrated Exoskeleton Matrices for Long-Term Endoskeleton Repair. ACS Appl Mater Interfaces 2019; 11:9786-9793. [PMID: 30689338 DOI: 10.1021/acsami.8b21569] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although biodegradable membranes are essential for effective bone repair, severe loss of mechanical stability because of rapid biodegradation, soft tissue invasion, and excessive immune response remain intrinsically problematic. Inspired by the exoskeleton-reinforcing strategy found in nature, we have produced a Ti-infiltrated chitin nanofibrous membrane. The membrane employs vapor-phase infiltration of metals, which often occurs during metal oxide atomic layer deposition (ALD) on organic substrates. This metal infiltration manifests anomalous mechanical improvement and stable integration with chitin without cytotoxicity and immunogenicity. The membrane exhibits both impressive toughness (∼13.3 MJ·m-3) and high tensile strength (∼55.6 MPa), properties that are often mutually exclusive. More importantly, the membrane demonstrates notably enhanced resistance to biodegradation, remaining intact over the course of 12 weeks. It exhibits excellent osteointegrative performance and suppresses the immune response to pathogen-associated molecular pattern molecules indicated by IL-1β, IL-6, and granulocyte-macrophage colony-stimulating factor expression. We believe the excellent chemico-biological properties achieved with ALD treatment can provide insight for synergistic utilization of the polymers and ALD in medical applications.
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Affiliation(s)
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT) , University of Science and Technology (UST) , Ulsan 44429 , Korea
| | | | - Do Van Lam
- Department of Nanomechanics, Korea Institute of Machinery and Materials (KIMM) , University of Science and Technology (UST) , 156 Gajeongbuk-ro , Yuseong-gu, Daejeon 34103 , Korea
| | | | - Jin-Soo Ahn
- Dental Research Institute and Department of Biomaterials Science , Seoul National University , Seoul 110-749 , Korea
| | | | - Sang-Ho Jun
- Department of Dentistry , Anam Hospital Korea University Medical Center , Seoul 136-705 , Korea
| | - Seung-Mo Lee
- Department of Nanomechanics, Korea Institute of Machinery and Materials (KIMM) , University of Science and Technology (UST) , 156 Gajeongbuk-ro , Yuseong-gu, Daejeon 34103 , Korea
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Tran TH, Nguyen HL, Hao LT, Kong H, Park JM, Jung SH, Cha HG, Lee JY, Kim H, Hwang SY, Park J, Oh DX. A ball milling-based one-step transformation of chitin biomass to organo-dispersible strong nanofibers passing highly time and energy consuming processes. Int J Biol Macromol 2019; 125:660-667. [DOI: 10.1016/j.ijbiomac.2018.12.086] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/02/2018] [Accepted: 12/08/2018] [Indexed: 12/11/2022]
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Koo JM, Kim H, Lee M, Park SA, Jeon H, Shin SH, Kim SM, Cha HG, Jegal J, Kim BS, Choi BG, Hwang SY, Oh DX, Park J. Nonstop Monomer-to-Aramid Nanofiber Synthesis with Remarkable Reinforcement Ability. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02391] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, SE-100 44, Stockholm, Sweden
| | - Hojun Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Minkyung Lee
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Seul-A Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Sung-Ho Shin
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Seon-Mi Kim
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Hyun Gil Cha
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Jonggeon Jegal
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Byeong-Su Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Bong Gill Choi
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do 25913, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Dongyeop X. Oh
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
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Tran TH, Nguyen HL, Hwang DS, Lee JY, Cha HG, Koo JM, Hwang SY, Park J, Oh DX. Five different chitin nanomaterials from identical source with different advantageous functions and performances. Carbohydr Polym 2018; 205:392-400. [PMID: 30446120 DOI: 10.1016/j.carbpol.2018.10.089] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 10/26/2018] [Accepted: 10/26/2018] [Indexed: 01/19/2023]
Abstract
Chitin is a renewable and sustainable biomass material that can be converted into various one-dimensional crystalline nanomaterials different in 1) length, 2) diameter, 3) charge density, 4) type of charge, and 5) crystallinity via diverse top-down synthetic methods. These nanomaterials have great potential as sustainable reinforcing and biologically functional materials. The proper design of chitin nanomaterials maximizes their performances in specific applications. Extensive efforts are devoted to understanding each type of chitin nanomaterial produced from different chitin sources; however, few studies have compared different chitin nanomaterials. Herein, we synthesize five different types of chitin nanomaterials from identical sources and compare their physical and chemical properties, including suitability for assorted purposes. Factors 1)-5) are discussed regarding their dominance in determining functionality depending on the specific goals of a) gas barriers, b) mechanical reinforcements, c) dispersibility in various pH aqueous buffers, d) thermal dimensional stability, and e) antibacterial activity. This study gives insights to design new chitin nanomaterial-based materials.
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Affiliation(s)
- Thang Hong Tran
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Hoang-Linh Nguyen
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Dong Soo Hwang
- Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Ju Young Lee
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Hyun Gil Cha
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea; Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
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Nguyen HL, Hanif Z, Park SA, Choi BG, Tran TH, Hwang DS, Park J, Hwang SY, Oh DX. Sustainable Boron Nitride Nanosheet-Reinforced Cellulose Nanofiber Composite Film with Oxygen Barrier without the Cost of Color and Cytotoxicity. Polymers (Basel) 2018; 10:E501. [PMID: 30966535 PMCID: PMC6415411 DOI: 10.3390/polym10050501] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/15/2018] [Accepted: 05/03/2018] [Indexed: 02/06/2023] Open
Abstract
This paper introduces a boron nitride nanosheet (BNNS)-reinforced cellulose nanofiber (CNF) film as a sustainable oxygen barrier film that can potentially be applied in food packaging. Most commodity plastics are oxygen-permeable. CNF exhibits an ideal oxygen transmission rate (OTR) of <1 cc/m²/day in highly controlled conditions. A CNF film typically fabricated by the air drying of a CNF aqueous solution reveals an OTR of 19.08 cc/m²/day. The addition of 0⁻5 wt % BNNS to the CNF dispersion before drying results in a composite film with highly improved OTR of 4.7 cc/m²/day, which is sufficient for meat and cheese packaging. BNNS as a 2D nanomaterial increases the pathway of oxygen gas and reduces the chances of pinhole formation during film fabrication involving water drying. In addition, BNNS improves the mechanical properties of the CNF films (Young's modulus and tensile strength) without significant elongation reductions, probably due to the good miscibility of CNF and BNNS in the aqueous solution. Addition of BNNS also produces negligible color change, which is important for film aesthetics. An in vitro cell experiment was performed to reveal the low cytotoxicity of the CNF/BNNS composite. This composite film has great potential as a sustainable high-performance food-packaging material.
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Affiliation(s)
- Hoang-Linh Nguyen
- Research Center for Bio-based chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Division of Environmental Science & Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea.
| | - Zahid Hanif
- Research Center for Bio-based chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Seul-A Park
- Research Center for Bio-based chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Bong Gill Choi
- Department of Chemical Engineering, Kangwon National University, Ganwan-do, Samcheok 25913, Korea.
| | - Thang Hong Tran
- Research Center for Bio-based chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea.
| | - Dong Soo Hwang
- Division of Environmental Science & Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea.
| | - Jeyoung Park
- Research Center for Bio-based chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea.
| | - Sung Yeon Hwang
- Research Center for Bio-based chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea.
| | - Dongyeop X Oh
- Research Center for Bio-based chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea.
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Kim SM, Jeon H, Shin SH, Park SA, Jegal J, Hwang SY, Oh DX, Park J. Superior Toughness and Fast Self-Healing at Room Temperature Engineered by Transparent Elastomers. Adv Mater 2018; 30:1705145. [PMID: 29131415 DOI: 10.1002/adma.201705145] [Citation(s) in RCA: 288] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 09/27/2017] [Indexed: 05/28/2023]
Abstract
The most important properties of self-healing polymers are efficient recovery at room temperature and prolonged durability. However, these two characteristics are contradictory, making it difficult to optimize them simultaneously. Herein, a transparent and easily processable thermoplastic polyurethane (TPU) with the highest reported tensile strength and toughness (6.8 MPa and 26.9 MJ m-3 , respectively) is prepared. This TPU is superior to reported contemporary room-temperature self-healable materials and conveniently heals within 2 h through facile aromatic disulfide metathesis engineered by hard segment embedded aromatic disulfides. After the TPU film is cut in half and respliced, the mechanical properties recover to more than 75% of those of the virgin sample within 2 h. Hard segments with an asymmetric alicyclic structure are more effective than those with symmetric alicyclic, linear aliphatic, and aromatic structures. An asymmetric structure provides the optimal metathesis efficiency for the embedded aromatic disulfide while preserving the remarkable mechanical properties of TPU, as indicated by rheological and surface investigations. The demonstration of a scratch-detecting electrical sensor coated on a tough TPU film capable of auto-repair at room temperature suggests that this film has potential applications in the wearable electronics industry.
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Affiliation(s)
- Seon-Mi Kim
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Hyeonyeol Jeon
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Sung-Ho Shin
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Seul-A Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Jonggeon Jegal
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, Republic of Korea
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
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Kim T, Jeon H, Jegal J, Kim JH, Yang H, Park J, Oh DX, Hwang SY. Correction: Trans crystallization behavior and strong reinforcement effect of cellulose nanocrystals on reinforced poly(butylene succinate) nanocomposites. RSC Adv 2018; 8:21636. [PMID: 35543991 PMCID: PMC9080951 DOI: 10.1039/c8ra90050g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 11/30/2022] Open
Abstract
Correction for ‘Trans crystallization behavior and strong reinforcement effect of cellulose nanocrystals on reinforced poly(butylene succinate) nanocomposites’ by Taeho Kim et al., RSC Adv., 2018, 8, 15389–15398.
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Affiliation(s)
- Taeho Kim
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
- Department of Polymer Engineering
| | - Hyeonyeol Jeon
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
| | - Jonggeon Jegal
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
| | - Joo Hyun Kim
- Department of Polymer Engineering
- Pukyong National University
- Busan
- Republic of Korea
| | - Hoichang Yang
- Department of Applied Organic Materials Engineering
- Inha University
- Incheon 22212
- Korea
| | - Jeyoung Park
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
- Green Chemistry and Environmental Biotechnology
| | - Dongyeop X. Oh
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
- Green Chemistry and Environmental Biotechnology
| | - Sung Yeon Hwang
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
- Green Chemistry and Environmental Biotechnology
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Kim T, Jeon H, Jegal J, Kim JH, Yang H, Park J, Oh DX, Hwang SY. Trans crystallization behavior and strong reinforcement effect of cellulose nanocrystals on reinforced poly(butylene succinate) nanocomposites. RSC Adv 2018; 8:15389-15398. [PMID: 35539463 PMCID: PMC9080038 DOI: 10.1039/c8ra01868e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 06/13/2018] [Accepted: 04/02/2018] [Indexed: 11/21/2022] Open
Abstract
Biodegradable poly(butylene succinate) (PBS) nanocomposites are polymerized via in situ polymerization of succinic acid (SA) with cellulose nanocrystal (CNC)-loaded 1,4-butanediol (1,4-BD) mixtures.
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Affiliation(s)
- Taeho Kim
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
- Department of Polymer Engineering
| | - Hyeonyeol Jeon
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
| | - Jonggeon Jegal
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
| | - Joo Hyun Kim
- Department of Polymer Engineering
- Pukyong National University
- Busan
- Republic of Korea
| | - Hoichang Yang
- Department of Applied Organic Materials Engineering
- Inha University
- Incheon 22212
- Korea
| | - Jeyoung Park
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
- Green Chemistry and Environmental Biotechnology
| | - Dongyeop X. Oh
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
- Green Chemistry and Environmental Biotechnology
| | - Sung Yeon Hwang
- Research Center for Industrial Chemical Biotechnology
- Korea Research Institute of Chemical Technology (KRICT)
- Ulsan 44429
- Republic of Korea
- Green Chemistry and Environmental Biotechnology
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Kim SM, Park SA, Hwang SY, Kim ES, Jegal J, Im C, Jeon H, Oh DX, Park J. Environmentally-Friendly Synthesis of Carbonate-Type Macrodiols and Preparation of Transparent Self-Healable Thermoplastic Polyurethanes. Polymers (Basel) 2017; 9:E663. [PMID: 30965963 PMCID: PMC6418697 DOI: 10.3390/polym9120663] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/21/2017] [Accepted: 11/29/2017] [Indexed: 11/28/2022] Open
Abstract
Carbonate-type macrodiols synthesized by base-catalyzed polycondensation of co-diols and dimethyl carbonate as an environmentally-friendly route were subsequently utilized for the preparation of transparent and self-healable thermoplastic polyurethanes (TPUs) containing a carbonate-type soft segment. Three types of macrodiols, obtained from mono, dual and triple diol-monomers for target molecular weights of 1 and 1.5 kg mol-1, were analyzed by ¹H NMR integration and the OH titration value. Colorless transparent macrodiols in a liquid state at a room temperature of 20 °C were obtained, except the macrodiol from mono 1,6-hexanediol. Before TPU synthesis, macrodiols require pH neutralization to prevent gelation. TPUs synthesized by a solution pre-polymer method with 4,4'-methylene(bisphenyl isocyanate) and 1,4-butanediol as a chain extender exhibited moderate molecular weights, good transparencies and robust mechanical properties. Especially, the incorporation of 3-methyl-1,5-pentanediol within carbonate-type macrodiols enhanced the transparency of the resultant TPUs by decreasing the degree of microphase separation evidenced by ATR-FTIR and DSC. Interestingly, packing density of hard segments and the degree of microphase separation determined the self-healing efficiency of TPUs, which showed good performances in the case of sourced macrodiols from triple diol-monomers.
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Affiliation(s)
- Seon-Mi Kim
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Seul-A Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Sung Yeon Hwang
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea.
| | - Eun Seon Kim
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Jonggeon Jegal
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Changgyu Im
- Department of Chemical Engineering, Hanyang University, Ansan 15588, Korea.
| | - Hyeonyeol Jeon
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Dongyeop X Oh
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea.
| | - Jeyoung Park
- Research Center for Bio-Based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
- Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon 34113, Korea.
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Park SA, Choi J, Ju S, Jegal J, Lee KM, Hwang SY, Oh DX, Park J. Copolycarbonates of bio-based rigid isosorbide and flexible 1,4-cyclohexanedimethanol: Merits over bisphenol-A based polycarbonates. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.03.077] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nguyen HL, Jo YK, Cha M, Cha YJ, Yoon DK, Sanandiya ND, Prajatelistia E, Oh DX, Hwang DS. Mussel-Inspired Anisotropic Nanocellulose and Silver Nanoparticle Composite with Improved Mechanical Properties, Electrical Conductivity and Antibacterial Activity. Polymers (Basel) 2016; 8:E102. [PMID: 30979192 PMCID: PMC6432548 DOI: 10.3390/polym8030102] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 03/06/2016] [Accepted: 03/16/2016] [Indexed: 12/16/2022] Open
Abstract
Materials for wearable devices, tissue engineering and bio-sensing applications require both antibacterial activity to prevent bacterial infection and biofilm formation, and electrical conductivity to electric signals inside and outside of the human body. Recently, cellulose nanofibers have been utilized for various applications but cellulose itself has neither antibacterial activity nor conductivity. Here, an antibacterial and electrically conductive composite was formed by generating catechol mediated silver nanoparticles (AgNPs) on the surface of cellulose nanofibers. The chemically immobilized catechol moiety on the nanofibrous cellulose network reduced Ag⁺ to form AgNPs on the cellulose nanofiber. The AgNPs cellulose composite showed excellent antibacterial efficacy against both Gram-positive and Gram-negative bacteria. In addition, the catechol conjugation and the addition of AgNP induced anisotropic self-alignment of the cellulose nanofibers which enhances electrical and mechanical properties of the composite. Therefore, the composite containing AgNPs and anisotropic aligned the cellulose nanofiber may be useful for biomedical applications.
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Affiliation(s)
- Hoang-Linh Nguyen
- Division of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea.
| | - Yun Kee Jo
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea.
| | - Minkyu Cha
- Pohang Jecheol High School, Pohang 790-784, Korea.
| | - Yun Jeong Cha
- Graduate School of Nanoscience and Technology and KAIST Institute for the NanoCentury (KINC), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea.
| | - Dong Ki Yoon
- Graduate School of Nanoscience and Technology and KAIST Institute for the NanoCentury (KINC), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea.
| | - Naresh D Sanandiya
- Division of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea.
| | - Ekavianty Prajatelistia
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang 790-784, Korea.
| | - Dongyeop X Oh
- Research Center for Industrial Chemical Biotechnology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea.
| | - Dong Soo Hwang
- Division of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea.
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang 790-784, Korea.
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea.
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Oh DX, Cha YJ, Nguyen HL, Je HH, Jho YS, Hwang DS, Yoon DK. Chiral nematic self-assembly of minimally surface damaged chitin nanofibrils and its load bearing functions. Sci Rep 2016; 6:23245. [PMID: 26988392 PMCID: PMC4796797 DOI: 10.1038/srep23245] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 03/03/2016] [Indexed: 11/10/2022] Open
Abstract
Chitin is one of the most abundant biomaterials in nature, with 1010 tons produced annually as hierarchically organized nanofibril fillers to reinforce the exoskeletons of arthropods. This green and cheap biomaterial has attracted great attention due to its potential application to reinforce biomedical materials. Despite that, its practical use is limited since the extraction of chitin nanofibrils requires surface modification involving harsh chemical treatments, leading to difficulties in reproducing their natural prototypal hierarchical structure, i.e. chiral nematic phase. Here, we develop a chemical etching-free approach using calcium ions, called “natural way”, to disintegrate the chitin nanofibrils while keeping the essential moiety for the self-assembly, ultimately resulting in the reproduction of chitin’s natural chiral structure in a polymeric matrix. This chiral chitin nanostructure exceptionally toughens the composite. Our resultant chiral nematic phase of chitin materials can contribute to the understanding and use of the reinforcing strategy in nature.
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Affiliation(s)
- Dongyeop X Oh
- Research Center for Industrial Chemical Biotechnology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Yun Jeong Cha
- Graduate School of Nanoscience and Technology and KINC, KAIST, Daejeon 305-701, Republic of Korea
| | - Hoang-Linh Nguyen
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Hwa Heon Je
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Yong Seok Jho
- Department of Physics, Pohang University of Science and Technology.,Asia Pacific Center for Theoretical Physics, Pohang 790-784, Republic of Korea
| | - Dong Soo Hwang
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea.,School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Dong Ki Yoon
- Graduate School of Nanoscience and Technology and KINC, KAIST, Daejeon 305-701, Republic of Korea
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Kang T, Banquy X, Heo J, Lim C, Lynd NA, Lundberg P, Oh DX, Lee HK, Hong YK, Hwang DS, Waite JH, Israelachvili JN, Hawker CJ. Mussel-Inspired Anchoring of Polymer Loops That Provide Superior Surface Lubrication and Antifouling Properties. ACS Nano 2016; 10:930-7. [PMID: 26695175 PMCID: PMC4932843 DOI: 10.1021/acsnano.5b06066] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We describe robustly anchored triblock copolymers that adopt loop conformations on surfaces and endow them with unprecedented lubricating and antifouling properties. The triblocks have two end blocks with catechol-anchoring groups and a looping poly(ethylene oxide) (PEO) midblock. The loops mediate strong steric repulsion between two mica surfaces. When sheared at constant speeds of ∼2.5 μm/s, the surfaces exhibit an extremely low friction coefficient of ∼0.002-0.004 without any signs of damage up to pressures of ∼2-3 MPa that are close to most biological bearing systems. Moreover, the polymer loops enhance inhibition of cell adhesion and proliferation compared to polymers in the random coil or brush conformations. These results demonstrate that strongly anchored polymer loops are effective for high lubrication and low cell adhesion and represent a promising candidate for the development of specialized high-performance biomedical coatings.
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Affiliation(s)
- Taegon Kang
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Chemical Research Institute, Samsung SDI Inc., Gocheon-Dong, Uiwang-Si, Gyeonggi-Do 437-711, Republic of Korea
| | - Xavier Banquy
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Corresponding Authors: . . .
| | - Jinhwa Heo
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Chanoong Lim
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
| | - Nathaniel A. Lynd
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Pontus Lundberg
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Dongyeop X. Oh
- Ocean Science and Technology Institute, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
| | - Han-Koo Lee
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
| | - Yong-Ki Hong
- Department of Biotechnology, Pukyong National University, Busan 608-737, Republic of Korea
| | - Dong Soo Hwang
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
- Ocean Science and Technology Institute, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
- Division of Integrative Biosciences and Biotechnology, School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
- Corresponding Authors: . . .
| | - John Herbert Waite
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Corresponding Authors: . . .
| | - Jacob N. Israelachvili
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Corresponding Authors: . . .
| | - Craig J. Hawker
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Corresponding Authors: . . .
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Kang T, Oh DX, Heo J, Lee HK, Choy S, Hawker CJ, Hwang DS. Formation, Removal, and Reformation of Surface Coatings on Various Metal Oxide Surfaces Inspired by Mussel Adhesives. ACS Appl Mater Interfaces 2015; 7:24656-24662. [PMID: 26492561 DOI: 10.1021/acsami.5b06910] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Mussels survive by strongly attaching to a variety of different surfaces, primarily subsurface rocks composed of metal oxides, through the formation of coordinative interactions driven by protein-based catechol repeating units contained within their adhesive secretions. From a chemistry perspective, catechols are known to form strong and reversible complexes with metal ions or metal oxides, with the binding affinity being dependent on the nature of the metal ion. As a result, catechol binding with metal oxides is reversible and can be broken in the presence of a free metal ion with a higher stability constant. It is proposed to exploit this competitive exchange in the design of a new strategy for the formation, removal, and reformation of surface coatings and self-assembled monolayers (SAM) based on catechols as the adhesive unit. In this study, catechol-functionalized tri(ethylene oxide) (TEO) was synthesized as a removable and recoverable self-assembled monolayer (SAM) for use on oxides surfaces. Attachment and detachment of these catechol derivatives on a variety of surfaces was shown to be reversible and controllable by exploiting the high stability constant of catechol to soluble metal ions, such as Fe(III). This tunable assembly based on catechol binding to metal oxides represents a new concept for reformable coatings with applications in fields ranging from friction/wettability control to biomolecular sensing and antifouling.
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Affiliation(s)
- Taegon Kang
- Chemical Research Institute, Samsung Cheil Industries, Inc. , Uiwang-si, Gyeonggi-do, 437-711, Republic of Korea
| | | | | | - Han-Koo Lee
- Pohang Accelerator Laboratory , Pohang, Gyeongbuk 790-784, Republic of Korea
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Oh DX, Kim S, Lee D, Hwang DS. Tunicate-mimetic nanofibrous hydrogel adhesive with improved wet adhesion. Acta Biomater 2015; 20:104-112. [PMID: 25841348 DOI: 10.1016/j.actbio.2015.03.031] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 03/05/2015] [Accepted: 03/26/2015] [Indexed: 12/21/2022]
Abstract
The main impediment to medical application of biomaterial-based adhesives is their poor wet adhesion strength due to hydration-induced softening and dissolution. To solve this problem, we mimicked the wound healing process found in tunicates, which use a nanofiber structure and pyrogallol group to heal any damage on its tunic under sea water. We fabricated a tunicate-mimetic hydrogel adhesive based on a chitin nanofiber/gallic acid (a pyrogallol acid) composite. The pyrogallol group-mediated cross-linking and the nanofibrous structures improved the dissolution resistance and cohesion strength of the hydrogel compared to the amorphous polymeric hydrogels in wet condition. The tunicate-mimetic adhesives showed higher adhesion strength between fully hydrated skin tissues than did fibrin glue and mussel-mimetic adhesives. The tunicate mimetic hydrogels were produced at low cost from recyclable and abundant raw materials. This tunicate-mimetic adhesive system is an example of how natural materials can be engineered for biomedical applications.
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Affiliation(s)
- Dongyeop X Oh
- Ocean Science and Technology Institute, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Sangsik Kim
- School of Environmental Science, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Dohoon Lee
- Ocean Science and Technology Institute, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Dong Soo Hwang
- Ocean Science and Technology Institute, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea; School of Environmental Science, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea; Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea.
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Oh DX, Prajatelistia E, Ju SW, Jeong Kim H, Baek SJ, Joon Cha H, Ho Jun S, Ahn JS, Soo Hwang D. A rapid, efficient, and facile solution for dental hypersensitivity: The tannin-iron complex. Sci Rep 2015; 5:10884. [PMID: 26039461 PMCID: PMC4454135 DOI: 10.1038/srep10884] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 05/08/2015] [Indexed: 12/13/2022] Open
Abstract
Dental hypersensitivity due to exposure of dentinal tubules under the enamel layer to saliva is a very popular and highly elusive technology priority in dentistry. Blocking water flow within exposed dentinal tubules is a key principle for curing dental hypersensitivity. Some salts used in "at home" solutions remineralize the tubules inside by concentrating saliva ingredients. An "in-office" option of applying dense resin sealants on the tubule entrance has only localized effects on well-defined sore spots. We report a self-assembled film that was formed by facile, rapid (4 min), and efficient (approximately 0.5 g/L concentration) dip-coating of teeth in an aqueous solution containing a tannic acid-iron(III) complex. It quickly and effectively occluded the dentinal tubules of human teeth. It withstood intense tooth brushing and induced hydroxyapatite remineralisation within the dentinal tubules. This strategy holds great promise for future applications as an effective and user-friendly desensitizer for managing dental hypersensitivity.
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Affiliation(s)
- Dongyeop X. Oh
- POSTECH Ocean Science and Technology, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
| | - Ekavianty Prajatelistia
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
| | - Sung-Won Ju
- Dental Research Institute and Department of Biomaterials Science, School of Dentistry, Seoul National University, Seoul 110-749, Korea
| | - Hyo Jeong Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
| | - Soo-Jin Baek
- Dental Research Institute and Department of Biomaterials Science, School of Dentistry, Seoul National University, Seoul 110-749, Korea
| | - Hyung Joon Cha
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
| | - Sang Ho Jun
- Department of Dentistry, Anam Hospital, Korea University Medical Centre, Seoul 136-705, Korea
| | - Jin-Soo Ahn
- Dental Research Institute and Department of Biomaterials Science, School of Dentistry, Seoul National University, Seoul 110-749, Korea
| | - Dong Soo Hwang
- POSTECH Ocean Science and Technology, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
- School of Environmental Science and Engineering, Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
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Prajatelistia E, Lim C, Oh DX, Jun SH, Hwang DS. Chitosan and hydroxyapatite composite cross-linked by dopamine has improved anisotropic hydroxyapatite growth and wet mechanical properties. Eng Life Sci 2015. [DOI: 10.1002/elsc.201400194] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Ekavianty Prajatelistia
- School of Interdisciplinary Bioscience and Bioengineering; Pohang University of Science and Technology; Pohang Korea
| | - Chanoong Lim
- School of Interdisciplinary Bioscience and Bioengineering; Pohang University of Science and Technology; Pohang Korea
| | - Dongyeop X. Oh
- POSTECH Ocean Science and Technology Institute; Pohang University of Science and Technology; Pohang Korea
| | - Sang Ho Jun
- Division of Oral and Maxillofacial Surgery; Department of Dentistry; Korea University Anam Hospital; Seoul Korea
| | - Dong Soo Hwang
- School of Interdisciplinary Bioscience and Bioengineering; Pohang University of Science and Technology; Pohang Korea
- POSTECH Ocean Science and Technology Institute; Pohang University of Science and Technology; Pohang Korea
- Integrative Bioscience and Bioengineering; Pohang University of Science and Technology; Pohang Korea
- School of Environmental Science and Engineering; Pohang University of Science and Technology; Pohang Korea
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