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Kheirandish M, Javanmard Dakheli M, Mizani M, Salehirad A. Mechanical properties, sustained release, and oxygen scavenging properties of nanocomposite films loaded with bimetallic nanoparticles (Fe 2O 3/TiO 2) in extra virgin olive oil. J Food Sci 2024. [PMID: 38602044 DOI: 10.1111/1750-3841.17063] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/05/2024] [Accepted: 03/19/2024] [Indexed: 04/12/2024]
Abstract
The aim of this study was the synthesis of bimetallic nanoparticles based on Fe2O3/TiO2 and its use in the poly(lactic acid) (PLA) films as an oxygen scavenger in extra virgin olive oil (EVOO) packaging. Bimetallic nanocomposites were prepared by two different precipitation methods (precipitation with ammonia and sodium hydroxide). The characteristics of bimetallic nanoparticles precipitated with sodium hydroxide (Na-Ti0.01Fe0.048O0.08) and bimetallic nanoparticles precipitated with ammonia (NH-Ti0.01Fe0.022O0.09) were compared. Relative amounts of elements in bimetallic nanocomposites and their morphological characteristics were determined using field emission scanning electron microscopy coupled with energy-dispersive X-ray spectrometer. Porosity volume and surface area of bimetallic nanoparticles were calculated using adsorption-desorption isotherms and the Brunauer-Emmett-Teller method. The formation/characterization of bimetallic nanoparticles and their location in the matrix of PLA-based nanocomposite film was studied using X-ray diffraction and Fourier transform infrared. In nanocomposite films based on PLA, bimetallic nanoparticles lead to better oxidative stability (peroxide value, p-anisidine index, K232, and K270) of the EVOO and oxygen scavenging during storage compared to free nanoparticles. Mechanical properties of nanocomposite films were improved due to bimetallic nanoparticles, which were better for Na-Ti0.01Fe0.048O0.08. In vitro release modeling of the bimetallic nanoparticles in EVOO proved that Fickian diffusion is the dominant mechanism, and the Peleg model was the best description of the release behavior of nanoparticles.
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Affiliation(s)
- Mahsa Kheirandish
- Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Majid Javanmard Dakheli
- Department of Chemical Technologies, Iranian Research Organization for Science & Technology (IROST), Tehran, Iran
| | - Maryam Mizani
- Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Alireza Salehirad
- Department of Chemical Technologies, Iranian Research Organization for Science & Technology (IROST), Tehran, Iran
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Elfadl AA, Bashal AH, Habeeb TH, Khalafalla MAH, Alkayal NS, Khalil KD. Preparation, Characterization, Dielectric Properties, and AC Conductivity of Chitosan Stabilized Metallic Oxides CoO and SrO: Experiments and Tight Binding Calculations. Polymers (Basel) 2023; 15:4132. [PMID: 37896376 PMCID: PMC10610641 DOI: 10.3390/polym15204132] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/10/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
Polymeric films made from chitosan (CS) doped with metal oxide (MO = cobalt (II) oxide and strontium oxide) nanoparticles at different concentrations (5, 10, 15, and 20% wt. MO/CS) were fabricated with the solution cast method. FTIR, SEM, and XRD spectra were used to study the structural features of those nanocomposite films. The FTIR spectra of chitosan showed the main characteristic peaks that are usually present, but they were shifted considerably by the chemical interaction with metal oxides. FTIR analysis of the hybrid chitosan-CoO nanocomposite exhibited notable peaks at 558 and 681 cm-1. Conversely, the FTIR analysis of the chitosan-SrO composite displayed peaks at 733.23 cm-1, 810.10 cm-1, and 856.39 cm-1, which can be attributed to the bending vibrations of Co-O and Sr-O bonds, respectively. In addition, the SEM graphs showed a noticeable morphological change on the surface of chitosan, which may be due to surface adsorption with metal oxide nanoparticles. The XRD pattern also revealed a clear change in the crystallinity of chitosan when it is in contact with metal oxide nanoparticles. The presence of characteristic signals for cobalt (Co) and strontium (Sr) are clearly shown in the EDX examinations, providing convincing evidence for their incorporation into the chitosan matrix. Moreover, the stability of the nanoparticle-chitosan coordinated bonding was verified from the accurate and broadly parametrized semi-empirical tight-binding quantum chemistry calculation. This leads to the determination of the structures' chemical hardness as estimated from the frontier's orbital calculations. We characterized the dielectric properties in terms of the real and imaginary dielectric permittivity as a function of frequency. Dielectric findings reveal the existence of extensive interactions of CoO and SrO, more pronounced for SrO, with the functional groups of CS through coordination bonding. This induces the charge transfer of the complexes between CoO and SrO and the CS chains and a decrease in the amount of the crystalline phase, as verified from the XRD patterns.
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Affiliation(s)
- Azza Abou Elfadl
- Department of Physics, Faculty of Science, Fayoum University, Fayoum 63514, Egypt;
| | - Ali H. Bashal
- Department of Chemistry, Faculty of Science, Taibah University, Yanbu 46423, Saudi Arabia;
| | - Talaat H. Habeeb
- Department of Biology, Faculty of Science, Taibah University, Yanbu 46423, Saudi Arabia;
| | - Mohammed A. H. Khalafalla
- Department of Physics, Faculty of Science, Taibah University-Yanbu Branch, Yanbu 46423, Saudi Arabia;
| | - Nazeeha S. Alkayal
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia;
| | - Khaled D. Khalil
- Department of Chemistry, Faculty of Science, Taibah University, Yanbu 46423, Saudi Arabia;
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
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Khalil KD, Riyadh SM, Bashal AH, Abolibda TZ, Gomha SM. Green Synthetic Approaches of 2-Hydrazonothiazol-4(5 H)-ones Using Sustainable Barium Oxide-Chitosan Nanocomposite Catalyst. Polymers (Basel) 2023; 15:3817. [PMID: 37765671 PMCID: PMC10534876 DOI: 10.3390/polym15183817] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/12/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
The diverse applications of metal oxide-biopolymer matrix as a nanocomposite heterogenous catalyst have caused many researches to scrutinize the potential of this framework. In this study, a novel hybrid barium oxide-chitosan nanocomposite was synthesized through a facile and cost-effective co-precipitation method by doping barium oxide nanoparticles within the chitosan matrix at a weight percentage of 20 wt.% BaO-chitosan. A thin film of the novel hybrid material was produced by casting the nanocomposite solution in a petri dish. Several instrumental methods, including Fourier-transform infrared (FTIR), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD), were used to analyze and characterize the structure of the BaO-CS nanocomposite. The chemical interaction with barium oxide molecules resulted in a noticeable displacement of the most significant chitosan-specific peaks in the FTIR spectra. When the surface morphology of SEM graphs was analyzed, a dramatic morphological change in the chitosan surface was also discovered; this morphological change can be attributed to the surface adsorption of BaO molecules. Additionally, the patterns of the XRD demonstrated that the crystallinity of the material, chitosan, appears to be enhanced upon interaction with barium oxide molecules with the active sites, OH and NH2 groups, along the chitosan backbone. The prepared BaO-CS nanocomposite can be used successfully as an effective heterogenous recyclable catalyst for the reaction of N,N'-(alkane-diyl)bis(2-chloroacetamide) with 2-(arylidinehydrazine)-1-carbothioamide as a novel synthetic approach to prepare 2-hydrazonothiazol-4(5H)-ones. This new method provides a number of benefits, including quick and permissive reaction conditions, better reaction yields, and sustainable catalysts for multiple uses.
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Affiliation(s)
- Khaled D. Khalil
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Almunawarah, Yanbu 46423, Saudi Arabia;
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Sayed M. Riyadh
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Almunawrah 30002, Saudi Arabia;
| | - Ali H. Bashal
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Almunawarah, Yanbu 46423, Saudi Arabia;
| | - Tariq Z. Abolibda
- Department of Chemistry, Faculty of Science, Islamic University of Madinah, Madinah 42351, Saudi Arabia; (T.Z.A.); (S.M.G.)
| | - Sobhi M. Gomha
- Department of Chemistry, Faculty of Science, Islamic University of Madinah, Madinah 42351, Saudi Arabia; (T.Z.A.); (S.M.G.)
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Arifin HR, Utaminingsih F, Djali M, Nurhadi B, Lembong E, Marta H. The Role of Virgin Coconut Oil in Corn Starch/NCC-Based Nanocomposite Film Matrix: Physical, Mechanical, and Water Vapor Transmission Characteristics. Polymers (Basel) 2023; 15:3239. [PMID: 37571131 PMCID: PMC10422339 DOI: 10.3390/polym15153239] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
Corn starch-based nanocomposite films usually have low moisture barrier properties. Adding virgin coconut oil (VCO) as a hydrophobic component can improve the nanocomposite film's characteristics, especially the film's permeability and elongation properties. This study aimed to determine the role of VCO with various concentrations (0, 3, 5 wt%) on the physical, mechanical, and water vapor transmission characteristics of corn starch/NCC-based nanocomposite films. Adding 3% VCO to the film showed the lowest WVTR value by 4.721 g/m2.h. At the same time, the value of tensile strength was 4.243 MPa, elongation 69.28%, modulus of elasticity 0.062 MPa, thickness 0.219 mm, lightness 98.77, and water solubility 40.51%. However, adding 5 wt% VCO to the film increased the film's elongation properties by 83.87%. The SEM test showed that adding VCO formed a finer structure with pores in several areas. The FTIR films showed that adding VCO caused a slightly higher absorption peak shift at the O-H groups and new absorption peaks at wave numbers 1741 cm-1 and 1742 cm-1. The results of this study may provide opportunities for the development of nanocomposite films as biodegradable packaging in the future.
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Affiliation(s)
- Heni Radiani Arifin
- Departement of Food Industrial Technology, Faculty of Agro-Industrial Technology, Universitas Padjadjaran, Sumedang 45363, Indonesia; (F.U.); (M.D.); (B.N.); (E.L.); (H.M.)
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Jeong J, Kim S, Yun S, Yang X, Kim YJ. Preparation and Characterization of Low CTE Poly(ethersulfone) Using Lignin Nano Composites as Flexible Substrates. Polymers (Basel) 2023; 15:3113. [PMID: 37514501 PMCID: PMC10383374 DOI: 10.3390/polym15143113] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/09/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
Polyethersulfone (PES) has outstanding thermal and dimensional stability. It is considered an engineering thermoplastic. However, its high coefficient of thermal expansion (CTE) hinders its use in automobiles, microelectronics, and flexible display areas. To overcome its high coefficient of thermal expansion (CTE), recent studies have focused on reducing its high CTE and improving its mechanical properties by adding nano-sized fillers or materials. The addition of nanofiller or nanofibrils to the PES matrix often has a positive effect on its mechanical and thermal properties, making it a flexible display substrate. To obtain ideal flexible substrates, we prepared polyethersulfone with lignin nanocomposite films to reduce CTE and improve the mechanical and thermal properties of PES by varying the relative ratio of PES in the lignin nanocomposite. In this study, lignin as a biodegradable nanofiller was found to show high thermal, oxidative, and hydrolytic stability with favorable mechanical properties. PES/lignin nanocomposite films were prepared by solution casting according to the content of lignin (0 to 5 wt.%). PES/lignin composite films were subjected to mechanical, thermo-mechanical, optical, and surface analyses. The results showed enhanced thermomechanical and optical properties of PES, with the potential benefits of lignin filler materials realized for the development of thermoplastic polymer blends.
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Affiliation(s)
- Jieun Jeong
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Soochan Kim
- Department of Engineering, University of Cambridge, Cambridge CB3 0FS, UK
| | - Sangsoo Yun
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Xin Yang
- Key Laboratory for Light-Weight Materials, Nanjing Tech University, Nanjing 210009, China
| | - Young Jun Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
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Choi SM, Lee SY, Lee S, Han SS, Shin EJ. In Situ Synthesis of Environmentally Friendly Waterborne Polyurethane Extended with Regenerated Cellulose Nanoparticles for Enhanced Mechanical Performances. Polymers (Basel) 2023; 15:polym15061541. [PMID: 36987323 PMCID: PMC10058780 DOI: 10.3390/polym15061541] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/14/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
The development of waterborne polyurethane (WPU) has been stimulated as an alternative to solvent-based polyurethanes due to low-VOC alternatives and reduced exposure to solvents. However, their relatively low mechanical performance and degradation have presented challenges in their wide application. Here, we developed environmentally-friendly bio polyol-based WPU nanocomposite dispersions and films, and presented the optimal process conditions for their manufacture. Additionally, the condition was established without using harmful catalysts or ethyl methyl ketone (MEK) during the polymerization. Moreover, regenerated cellulose nanoparticles (RCNs) were employed as natural chain-extenders in order to improve the biodegradability and mechanical performances of the nanocomposite films. The RCNs have a lower crystallinity compared to cellulose nanocrystals (CNCs), allowing them to possess high toughness without interfering with the elastomeric properties of polyurethane. The prepared CWPU/RCNs nanocomposite films exhibited high toughness of 58.8 ± 3 kgf∙mm and elongation at break of 240 ± 20%. In addition, depending on the molar ratio of NCO/OH, the polyurethane particle size is variously controlled from 70 to 230 nm, enabling to fabricate their dispersions with various transmittances. We believe that our findings not only open a meaningful path toward green elastomers with biodegradability but provides the design concept for bio-elastomers in order to develop industrial elastomers with mechanical and thermal properties.
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Affiliation(s)
- Soon Mo Choi
- Research Institute of Cell Culture, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Republic of Korea
| | - Soo Young Lee
- Department of Polymer Science & Engineering, Pusan National University, Busandaehak-ro 63 Beon-gil 2, Busan 46241, Republic of Korea
| | - Sunhee Lee
- Department of Fashion Design, Dong-A University, 37 Nakdong-daero 550 Beon-gil, Busan 49315, Republic of Korea
| | - Sung Soo Han
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Republic of Korea
| | - Eun Joo Shin
- Department of Chemical Engineering, Dong-A University, 37 Nakdong-daero 550 Beon-gil, Busan 49315, Republic of Korea
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Wen L, Xie D, Wu J, Liang Y, Zhang Y, Li J, Xu C, Lin B. Humidity-/Sweat-Sensitive Electronic Skin with Antibacterial, Antioxidation, and Ultraviolet-Proof Functions Constructed by a Cross-Linked Network. ACS Appl Mater Interfaces 2022; 14:56074-56086. [PMID: 36508579 DOI: 10.1021/acsami.2c15876] [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] [Indexed: 06/17/2023]
Abstract
Most electronic skins (e-skins) show unique performance or possess sensory functions. The raw materials used for their preparation are potentially toxic or harmful, and there may be problems such as poor compatibility between the conductive fillers and polymers. In this paper, a silver-loaded nanocomposite film (PVA/CMS/vanillin/nanoAg) was prepared by the in situ reduction method in a greener route. The mechanical properties of this nanocomposite film had improved with a tensile strength of 30.95 MPa, an elongation at break of 101.9%, and a Young's modulus of 10.62 MPa. In the composite matrix, a cross-linked network was constructed based on the coordination and hydrogen bonds, which was conducive to the stability of the reduced AgNPs and AgNWs. When applied as an e-skin in humidity/sweat sensors and wearable electronics, the nanocomposite film responds to humidity within 60 s and records the electric signals of human joint movements and skin sweating with a response range of 0-140% to strain at 93% RH. This kind of e-skin has excellent antibacterial and antioxidant activities and shows an outstanding ultraviolet-proof performance, which provides a greener promising reference route for the design of wearable e-skins to monitor the health and movements of humans.
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Affiliation(s)
- Lishan Wen
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning530004, PR China
| | - Donghong Xie
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning530004, PR China
| | - Jia Wu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning530004, PR China
| | - Yuntong Liang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning530004, PR China
| | - Yuancheng Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning530004, PR China
| | - Jianfang Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning530004, PR China
| | - Chuanhui Xu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning530004, PR China
| | - Baofeng Lin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning530004, PR China
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Deng Z, Wu Z, Tan X, Deng F, Chen Y, Chen Y, Zhang H. Preparation, Characterization and Antibacterial Property Analysis of Cellulose Nanocrystals (CNC) and Chitosan Nanoparticles Fine-Tuned Starch Film. Molecules 2022; 27:molecules27238542. [PMID: 36500634 PMCID: PMC9739116 DOI: 10.3390/molecules27238542] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 11/25/2022] [Accepted: 12/02/2022] [Indexed: 12/09/2022] Open
Abstract
To improve the mechanical and antibacterial properties of traditional starch-based film, herein, cellulose nanocrystals (CNCs) and chitosan nanoparticles (CS NPs) were introduced to potato starch (PS, film-forming matrix) for the preparation of nanocomposite film without incorporation of additional antibacterial agents. CNCs with varied concentrations were added to PS and CS NPs composite system to evaluate the optimal film performance. The results showed that tensile strength (TS) of nanocomposite film with 0, 0.01, 0.05, and 0.1% (w/w) CNCs incorporation were 41, 46, 47 and 41 MPa, respectively. The elongation at break (EAB) reached 12.5, 10.2, 7.1 and 13.3%, respectively. Due to the reinforcing effect of CNCs, surface morphology and structural properties of nanocomposite film were altered. TGA analysis confirmed the existence of hydrogen bondings and electrostatic attractions between components in the film-forming matrix. The prepared nanocomposite films showed good antibacterial properties against both E. coli and S. aureus. The nanocomposite film, consist of three most abundant biodegradable polymers, could potentially serve as antibacterial packaging films with strong mechanical properties for food and allied industries.
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Affiliation(s)
- Zilong Deng
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Zixuan Wu
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xiao Tan
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Fangkun Deng
- Jiangxi New Dragon Biotechnology Co., Ltd., Yichun 336000, China
| | - Yaobang Chen
- Sibang Environmental Protection Technology Co., Ltd., Yichun 336000, China
| | - Yanping Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hongcai Zhang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Correspondence: ; Tel./Fax: +86-021-3420-6567
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Roy S, Ezati P, Priyadarshi R, Biswas D, Rhim JW. Recent advances in metal sulfide nanoparticle-added bio nanocomposite films for food packaging applications. Crit Rev Food Sci Nutr 2022:1-14. [PMID: 36368310 DOI: 10.1080/10408398.2022.2144794] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Metal sulfide nanoparticles have recently attracted much attention due to their unique physical and functional properties. Metal sulfide nanoparticles used as optoelectronic and biomedical materials in the past decades are promising for making functional nanocomposite films due to their low toxicity and strong antibacterial activity. Recently, copper sulfide and zinc sulfide nanomaterials have been used to produce food packaging films for active packaging. Metal sulfide nanoparticles added as nanofillers are attracting attention in packaging applications due to their excellent potential to improve mechanical, barrier properties, and antibacterial activity. This review covers the fabrication process and important applications of metal sulfide nanoparticles. The development of metal sulfides reinforcing mainly copper sulfide and zinc sulfide nanomaterials as multifunctional nanofillers in bio-based films for active packaging applications has been comprehensively reviewed. As the recognition of metal sulfide nanoparticles as a functional filler increases, the development and application potential of active packaging films using them is expected to increase.
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Affiliation(s)
- Swarup Roy
- School of Bioengineering and Food Technology, Shoolini University, Solan, Himachal Pradesh, India
| | - Parya Ezati
- Department of Food and Nutrition, BioNanocomposite Research Institute, Kyung Hee University, Seoul, Republic of Korea
| | - Ruchir Priyadarshi
- Department of Food and Nutrition, BioNanocomposite Research Institute, Kyung Hee University, Seoul, Republic of Korea
| | - Deblina Biswas
- School of Bioengineering and Food Technology, Shoolini University, Solan, Himachal Pradesh, India
| | - Jong-Whan Rhim
- Department of Food and Nutrition, BioNanocomposite Research Institute, Kyung Hee University, Seoul, Republic of Korea
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Fu Y, Li H, Chen J, Guo H, Wang X. Microstructure, Mechanical and Tribological Properties of Arc Ion Plating NbN-Based Nanocomposite Films. Nanomaterials (Basel) 2022; 12:3909. [PMID: 36364686 PMCID: PMC9655467 DOI: 10.3390/nano12213909] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
NbN, NbN-Ag and NbN/NbN-Ag multilayer nanocomposite films were successfully deposited by an arc ion plating system (AIP), and their microstructures, mechanical and tribological properties were systematically investigated. The results show that all the films had a polycrystalline structure, and the Ag in the Ag-doped films existed independently as a face-centered cubic phase. The content of Ag in NbN-Ag and NbN/NbN-Ag films was 20.11 and 9.07 at.%, respectively. NbN films fabricated by AIP technique had excellent mechanical properties, and their hardness and critical load were up to 44 GPa and 34.6 N, respectively. The introduction of Ag into NbN films obviously reduced the friction coefficient at room temperature, while the mechanical properties and wear resistance were degraded sharply in comparison with that of NbN films. However, the NbN/NbN-Ag films presented better hardness, H/E*, H3/E*2, adhesive strength and wear resistance than NbN-Ag films. Additionally, analysis of wear surfaces of the studied films and Al2O3 balls using 3D images, depth profiles, energy dispersive spectrometry (EDS) and Raman spectra indicated that the main wear mechanisms of NbN and NbN/NbN-Ag films were adhesive and oxidation wear with slight abrasive wear, while the severe abrasive and oxidation wear were the dominant wear mechanism for NbN-Ag films.
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Affiliation(s)
- Yingying Fu
- Bailie School of Petroleum Engineering, Lanzhou City University, Lanzhou 730070, China
| | - Hongxuan Li
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Jianmin Chen
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Hongjian Guo
- School of Bailie Mechanical Engineering, Lanzhou City University, Lanzhou 730070, China
| | - Xiang Wang
- School of Bailie Mechanical Engineering, Lanzhou City University, Lanzhou 730070, China
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V AK, M P, Srivastav PP, Mangaraj S, R P, Hasan M. Development of soy-based nanocomposite film: Modeling for barrier and mechanical properties and its application as cheese slice separator. J Texture Stud 2022; 53:809-819. [PMID: 34580884 DOI: 10.1111/jtxs.12636] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/21/2021] [Accepted: 09/21/2021] [Indexed: 12/16/2022]
Abstract
In the current study, soybean aqueous extract (SAE)-based nanocomposite film was developed by incorporating cellulose nanofiber (CNF) at various concentrations (0-10%). Effect of nanoreinforcement on essential properties of the nanocomposite film such as barrier, mechanical, water affinity, and optical properties were evaluated. Homogeneous films with improved barrier and mechanical properties were observed until 6% CNF, beyond which considerable reduction in desirable properties was noticed due to nanoparticle's agglomeration effect. Furthermore, the prediction of the mechanical and barrier properties of nanocomposite film was performed with mathematical models such as modified Halpin-Tsai and modified Nielsen equations, respectively. The model-fitting results reveal that the theoretically predicted values were in close agreement with the experimental values. Hence, these models were well suited for predicting respective properties. Model prediction also implies that the increase in the aspect ratio of fillers can considerably cause a reduction in water vapor permeability and improvement in mechanical properties. Suitability of developed film as cheese slice separator was evaluated: they had equivalent outcomes in terms of easiness in slice separation and wholeness of slices after separation compared to the commercial material.
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Affiliation(s)
- Ajesh Kumar V
- Centre of Excellence on Soybean Processing and Utilization, ICAR - Central Institute of Agricultural Engineering, Bhopal, India
| | - Pravitha M
- Agro Produce Processing Division, ICAR - Central Institute of Agricultural Engineering, Bhopal, India
| | - Prem Prakash Srivastav
- Department of Agricultural and Food Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Shukadev Mangaraj
- Centre of Excellence on Soybean Processing and Utilization, ICAR - Central Institute of Agricultural Engineering, Bhopal, India
| | - Pandiselvam R
- Division of Physiology, Biochemistry and Post-Harvest Technology, ICAR - Central Plantation Crops Research Institute, Kasaragod, India
| | - Muzaffar Hasan
- Agro Produce Processing Division, ICAR - Central Institute of Agricultural Engineering, Bhopal, India
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Zhao J, Qian J, Luo J, Huang M, Yan W, Zhang J. Application of Ag@SiO 2 nanoparticles within PVA to reduce growth of E. coli and S. aureus in beef patties. J Food Sci 2022; 87:4569-4579. [PMID: 36065890 DOI: 10.1111/1750-3841.16292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 05/26/2021] [Revised: 07/18/2022] [Accepted: 07/23/2022] [Indexed: 11/29/2022]
Abstract
To overcome defects of polyvinyl alcohol (PVA) and expand its applications in food preservation, PVA/Ag@SiO2 nanocomposite films were prepared using the solution intercalation film-casting method. Transmission electron microscopy, X-ray diffraction, and UV-visible absorption spectra were applied to confirm the synthesis of the nanoparticles (NPs). Effects of Ag@SiO2 NPs on physicochemical characteristics of films like viscosity, swelling ratio, tensile strength, elongation at break, as well as antibacterial activity were also evaluated. Results indicate that Ag@SiO2 NPs could be synthesized successfully, and the increasing concentration of Ag@SiO2 NPs led to the decrease in viscosity and the swelling ratio of the PVA/Ag@SiO2 NPs nanocomposite films. PVA/Ag@SiO2 nanocomposite films exhibited increased tensile strength and strong antibacterial activity against Escherichia coli and Staphylococcus aureus. The films had higher antibacterial activity toward E. coli compared with S. aureus. Beef patties were applied to verify the practicality of PVA/Ag@SiO2 films. PVA/Ag@SiO2 NPs nanocomposite films act as an active food packaging system showing great potential in retaining food safety and prolonging the shelf-life of packaged foods. PRACTICAL APPLICATION: During the storage of fresh meat, the microbial count on the meat surface increased with increasing storage time; meat proteins could be broken down by microorganisms, causing the tissue structure to be destroyed, leading to loose muscle fibers and loss of nutrient-containing juices. In this paper, by improving the PVA film, a new antibacterial membrane was prepared, which can be used for fresh meat sold in supermarkets, as a lining at the bottom of the meat or directly covering the meat. The method can significantly decrease the number of microorganisms and extend the shelf-life of fresh meat.
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Affiliation(s)
- Jianying Zhao
- College of Tea and Food Technology, Jiangsu Vocational College of Agriculture and Forestry, Jurong, Jiangsu, China
| | - Jing Qian
- National Center of Meat Quality and Safety Control, Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Ji Luo
- College of Life Science, Anhui Normal University, Wuhu, Anhui, China
| | - Mingming Huang
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong, China
| | - Wenjing Yan
- National Center of Meat Quality and Safety Control, Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jianhao Zhang
- National Center of Meat Quality and Safety Control, Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
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Bhatta S, Mitra R, Ramadoss A, Manju U. Enhanced voltage response in TiO 2nanoparticle-embedded piezoelectric nanogenerator. Nanotechnology 2022; 33:335402. [PMID: 35533643 DOI: 10.1088/1361-6528/ac6df5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/09/2022] [Indexed: 06/14/2023]
Abstract
Poly (vinylidene fluoride) (PVDF) and its copolymers have piqued a substantial amount of research interest for its use in modern flexible electronics. The piezoelectricβ-phase of the polymers can be augmented with the addition of suitable fillers that promoteβ-phase nucleation. In this work, we report an improved output voltage response of poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) with the incorporation of 10 wt.% Titanium (IV) oxide nanoparticles into the polymer matrix. The nano-filler was dispersed in the polymer matrix to form nanocomposite films via the solution casting technique. X-ray Diffraction and Scanning Electron Microscopy measurements were performed to verify the structure and morphology of the films. Fourier Transform Infrared Spectroscopy revealed enhancement in theβ-phase nucleation from ∼15% to ∼36% with the addition of 10 wt.% titania nanoparticles. Thermogravimetric analysis and Differential Scanning Calorimetry results show improved thermal stability of the nanocomposite film, up to 345 °C, as compared to pristine PVDF-HFP. We also demonstrate a facile method for the fabrication of a piezoelectric nanogenerator withβ-PVDF-HFP/TiO2nanocomposite as an active layer. The outputs from the fabricated nanogenerator reached up to 8.89 V through human finger tapping motions, paving way for its potential use in the field of sensors, actuators, and self-sustaining flexible devices.
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Affiliation(s)
- Sheetal Bhatta
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh-201002, India
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, Odisha-751013, India
| | - Rahul Mitra
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh-201002, India
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, Odisha-751013, India
| | - Ananthakumar Ramadoss
- School for Advanced Research in Petrochemicals: Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Petrochemicals Engineering and Technology (CIPET), Bhubaneswar 751024, India
| | - Unnikrishnan Manju
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh-201002, India
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, Odisha-751013, India
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14
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Yang M, Zhang M, Wang Y, Li Y, Han W, Dang X. Silver Nanoparticle-Loaded Gelatin-Based Nanocomposite Films toward Enhanced Mechanical Properties and Antibacterial Activity. ACS Appl Bio Mater 2022; 5:2193-2201. [PMID: 35438952 DOI: 10.1021/acsabm.2c00039] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Gelatin (GH) is a natural polymer material with unique physical, chemical, and biological properties that render it a good base material for biomedical material production. Herein, Ag nanoparticles (NPs) were loaded onto a waterborne polyurethane-GH composite (WPU-g-GH) to prepare a GH-based nanocomposite (AgNP/WPU-g-GH) films). The prepared nanocomposite films were characterized using several analyses including Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, X-ray diffraction, transmission emission microscopy, mechanical strength tests, and other analyses. The results demonstrated that the nanocomposite films had high mechanical strength, good thermal stability, and controllable biodegradability. In particular, when the AgNP loading content was 0.03%, the tensile strength, elongation at break, and average particle size of the nanocomposite film reached 45.13 MPa, 476.04%, and 13.02978 ± 1.64406 nm, respectively. Disk diffusion and cytotoxicity analyses revealed that the nanocomposite films exhibited significant antibacterial activity against Gram-negative and Gram-positive bacteria without affecting the cell viability of fibroblasts. These findings indicate that the nanocomposite films with high mechanical strength and antibacterial activity could be used for wound management, tissue adhesion, and biomaterial surface coating.
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Affiliation(s)
- Mao Yang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Min Zhang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Yu Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Yanchun Li
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Wenjia Han
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Xugang Dang
- Institute for Biomass and Function Materials & College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
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Praseptiangga D, Widyaastuti D, Panatarani C, Joni IM. Development and Characterization of Semi-Refined Iota Carrageenan/SiO 2-ZnO Bio nanocomposite Film with the Addition of Cassava Starch for Application on Minced Chicken Meat Packaging. Foods 2021; 10:2776. [PMID: 34829058 DOI: 10.3390/foods10112776] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/07/2021] [Accepted: 11/09/2021] [Indexed: 11/22/2022] Open
Abstract
In the current study, film based on semi-refined ι-carrageenan/cassava starch (SRiC/CS) incorporated with SiO2-ZnO nanoparticles was fabricated and characterized to deal with serious environmental problems resulting from plastic packaging materials. This study aimed to evaluate film properties with the variation of SRiC/CS proportions of bionanocomposite films for application to minced chicken meat packaging. Increasing CS portion contributed to increased transparency, reduced surface roughness, and decreased mechanical properties of films. The variable significantly (p < 0.05) increased the water vapor permeability (WVP) and reduced the water solubility of films. The incorporation of the nanoparticles significantly (p < 0.05) increased UV screening, decreased WVP, and enhanced the antimicrobial activity of films. Furthermore, the substitution of 0.5 wt% (weight percentage) CS provided the best film characteristics. Based on the color and the total volatile base nitrogen (TVBN) results, SRiC film incorporated with the nanoparticles preserved minced chicken quality up to six days. Thus, the developed films are desirable for biodegradable food packaging.
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Calva-Estrada SDJ, Jimenez-Fernandez M, Vallejo-Cardona AA, Castillo-Herrera GA, Lugo-Cervantes EDC. Cocoa Nanoparticles to Improve the Physicochemical and Functional Properties of Whey Protein-Based Films to Extend the Shelf Life of Muffins. Foods 2021; 10:foods10112672. [PMID: 34828954 PMCID: PMC8622579 DOI: 10.3390/foods10112672] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/20/2021] [Accepted: 10/30/2021] [Indexed: 11/16/2022] Open
Abstract
A novel nanocomposite whey protein-based film with nanoemulsified cocoa liquor (CL) was prepared using one-stage microfluidization to evaluate the emulsion properties and the effect of CL on the film properties by response surface methodology (RSM). The results indicated that the number of cycles by microfluidization had a significant effect (p < 0.05) on the particle size and polydispersity of the nanoemulsion, with a polyphenol retention of approximately 83%. CL decreased the solubility (<21.87%) and water vapor permeability (WVP) (<1.57 g mm h-1 m-2 kPa-1) of the film. FTIR analysis indicated that CL modified the secondary protein structure of the whey protein and decreased the mechanical properties of the film. These results demonstrate that applying the film as a coating is feasible and effective to improve the shelf life of bakery products with a high moisture content. This nanocomposite film is easy to produce and has potential applications in the food industry.
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Affiliation(s)
- Sergio de Jesús Calva-Estrada
- Unidad de Tecnología Alimentaria, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CIATEJ) A.C., Camino Arenero 1227, El Bajío, Zapopan C.P. 45019, JAL, Mexico; (S.d.J.C.-E.); (G.A.C.-H.)
| | - Maribel Jimenez-Fernandez
- Centro de Investigación y Desarrollo en Alimentos, Universidad Veracruzana, Av. Doctor Luis Castelazo, Industrial Las Animas, Xalapa Enríquez C.P. 91190, VER, Mexico
- Correspondence: (M.J.-F.); (E.d.C.L.-C.)
| | - Alba Adriana Vallejo-Cardona
- Consejo Nacional de Ciencia y Tecnología—Unidad de Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CONACYT-CIATEJ) A.C., Av. Normalistas 800, Colinas de la Normal, Guadalajara C.P. 44270, JAL, Mexico;
| | - Gustavo Adolfo Castillo-Herrera
- Unidad de Tecnología Alimentaria, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CIATEJ) A.C., Camino Arenero 1227, El Bajío, Zapopan C.P. 45019, JAL, Mexico; (S.d.J.C.-E.); (G.A.C.-H.)
| | - Eugenia del Carmen Lugo-Cervantes
- Unidad de Tecnología Alimentaria, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CIATEJ) A.C., Camino Arenero 1227, El Bajío, Zapopan C.P. 45019, JAL, Mexico; (S.d.J.C.-E.); (G.A.C.-H.)
- Correspondence: (M.J.-F.); (E.d.C.L.-C.)
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17
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Her SC, Zhang KC. Mode I Fracture Toughness of Graphene Reinforced Nanocomposite Film on Al Substrate. Nanomaterials (Basel) 2021; 11:nano11071743. [PMID: 34361128 PMCID: PMC8308121 DOI: 10.3390/nano11071743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 11/16/2022]
Abstract
Nanocomposites were prepared by adding graphene nanoplatelets (GNP) into epoxy with a variety of loadings. The thickness of GNPs used in this study was in a range of 1 nm to 10 nm. Nanocomposite film was deposited on the aluminum (Al) substrate via a spinning coating process. Tensile tests were carried out to determine the elastic modulus, ultimate strength and fracture strain of the nanocomposites. Theoretical prediction of the fracture toughness of the film/substrate composite structure with an interfacial crack under mode I loading was derived utilizing linear elastic fracture mechanics theory. Four-point bending tests were performed to evaluate the mode I fracture toughness. It was observed that the performance of the nanocomposite, such as elastic modulus, ultimate strength, and fracture toughness, were significantly enhanced by the incorporation of GNPs and increased with the increase in GNP concentration. The elastic modulus and mode I fracture toughness of the epoxy reinforced with 1 wt.% of GNPs were increased by 42.2% and 32.6%, respectively, in comparison with pure epoxy. Dispersion of GNPs in the epoxy matrix was examined by scanning electron microscope (SEM). It can be seen that GNPs were uniformly dispersed in the epoxy matrix, resulting in the considerable improvements of the ultimate strength and fracture toughness of the nanocomposite.
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18
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Khalil KD, Riyadh SM, Jaremko M, Farghaly TA, Hagar M. Synthesis of Chitosan-La 2O 3 Nanocomposite and Its Utility as a Powerful Catalyst in the Synthesis of Pyridines and Pyrazoles. Molecules 2021; 26:3689. [PMID: 34204215 PMCID: PMC8234470 DOI: 10.3390/molecules26123689] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 12/23/2022] Open
Abstract
Recently, the development of nanocatalysts based on naturally occurring polysaccharides has received a lot of attention. Chitosan (CS), as a biodegradable and biocompatible polysaccharide, is considered to be an excellent template for the design of a hybrid biopolymer-based metal oxide nanocomposite. In this case, lanthanum oxide nanoparticles doped with chitosan at different weight percentages (5, 10, 15, and 20 wt% CS/La2O3) were prepared via a simple solution casting method. The prepared CS/La2O3 nanocomposite solutions were cast in a Petri dish in order to produce the developed catalyst, which was shaped as a thin film. The structural features of the hybrid nanocomposite film were studied by FTIR, SEM, and XRD analytical tools. FTIR spectra confirmed the presence of the major characteristic peaks of chitosan, which were modified by interaction with La2O3 nanoparticles. Additionally, SEM graphs showed dramatic morphological changes on the surface of chitosan, which is attributed to surface adsorption with La2O3 molecules. The prepared CS/La2O3 nanocomposite film (15% by weight) was investigated as an effective, recyclable, and heterogeneous base catalyst in the synthesis of pyridines and pyrazoles. The nanocomposite used was sufficiently stable and was collected and reused more than three times without loss of catalytic activity.
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Affiliation(s)
- Khaled D. Khalil
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt; (S.M.R.); (T.A.F.)
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Almunawarah, Yanbu 46423, Saudi Arabia;
| | - Sayed M. Riyadh
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt; (S.M.R.); (T.A.F.)
- Department of Chemistry, College of Science, Taibah University, Al-Madinah Almunawrah 30002, Saudi Arabia
| | - Mariusz Jaremko
- Biological and Environmental Sciences & Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;
| | - Thoraya A. Farghaly
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt; (S.M.R.); (T.A.F.)
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah Almukaramah 21514, Saudi Arabia
| | - Mohamed Hagar
- Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Almunawarah, Yanbu 46423, Saudi Arabia;
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria 21321, Egypt
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Alashrah S, El-Ghoul Y, Omer MAA. Synthesis and Characterization of a New Nanocomposite Film Based on Polyvinyl Alcohol Polymer and Nitro Blue Tetrazolium Dye as a Low Radiation Dosimeter in Medical Diagnostics Application. Polymers (Basel) 2021; 13:1815. [PMID: 34072823 DOI: 10.3390/polym13111815] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 02/06/2023] Open
Abstract
Dosimetry is a field of increasing importance in diagnostic radiology. There has been a realization among healthcare professionals that the dose of radiation received by patients via modern medical X-ray examinations could induce acute damage to the skin and eyes. The present study highlights the synthesis of polyvinyl alcohol/nitro blue tetrazolium nanocomposite films (PVA/NBT) for radiation detection depending on chromic, optical, chemical and morphologic changes. First, we synthesized the nanocomposite film-based PVA doped with NBT and the different parameters of the preparation procedure were optimized. Then The films were exposed to different low X-ray doses on the scale of mGy level (0, 2, 4, 10 and 20 mGy). The sensitivity and the performance of the made composite films were evaluated via different characterization methods. Indeed, the response curve based on UV-Vis absorptions revealed a linear increase in absorbance with increased radiation doses (R = 0.998). FTIR analysis showed a clear chemical modification in recorded spectra after irradiation. X-ray diffraction assessment revealed clear structural changes in crystallinity after ionization treatment. SEM analysis showed a clear morphological modification of PVA/NBT films after irradiation. In addition, the prepared PVA/NBT films exhibited excellent pre- and post-irradiation stability in dark and light. Finally, the quantitative colorimetry study confirmed the performance of the prepared films and the different colorimetric coordinates, the total color difference (∆E) and the color strength (K/S) showed a linear increase with increasing X-ray doses. The made nanocomposite PVA/NBT film might offer promising potential for an effective highly sensitive medical dosimeter applied for very low doses in X-ray diagnostic radiology.
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Usawattanakul N, Torgbo S, Sukyai P, Khantayanuwong S, Puangsin B, Srichola P. Development of Nanocomposite Film Comprising of Polyvinyl Alcohol (PVA) Incorporated with Bacterial Cellulose Nanocrystals and Magnetite Nanoparticles. Polymers (Basel) 2021; 13:1778. [PMID: 34071613 DOI: 10.3390/polym13111778] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/23/2021] [Accepted: 05/25/2021] [Indexed: 12/19/2022] Open
Abstract
Nanocomposite film of poly(vinyl alcohol) (PVA) incorporated with bacterial cellulose nanocrystals (BCNCs) and magnetite nanoparticles (Fe3O4) is reported in this study. The BCNC-Fe3O4 nanoparticles and PVA film was prepared by in situ synthesis technique using chemical co-precipitation. Different concentrations of BCNC-Fe3O4 (20%, 40% and 60% w/w) were mechanically dispersed in PVA solution to form the nanocomposite film. Transmission electron microscopy (TEM) analysis of BCNC-Fe3O4 nanoparticles showed irregular particle sizes ranging from 4.93 to 30.44 nm with an average size distribution of 22.94 nm. The presence of characteristic functional groups of PVA, BCNC and Fe3O4 were confirmed by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) analysis. Scanning electron microscope (SEM) attached energy dispersive spectroscopy (EDS) and vibrating sample magnetometer (VSM) analysis revealed that, the iron content and magnetic property increased with increasing BCNC-Fe3O4 content. The saturation magnetizations (MS) value increased from 5.14 to 11.56 emu/g. The PVA/ BCNC-Fe3O4 at 60% showed the highest Young's modulus value of 2.35 ± 0.16 GPa. The prepared film could be a promising polymeric nanomaterial for various magnetic-based applications and for the design of smart electronic devices.
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Roy S, Kim HC, Panicker PS, Rhim JW, Kim J. Cellulose Nanofiber-Based Nanocomposite Films Reinforced with Zinc Oxide Nanorods and Grapefruit Seed Extract. Nanomaterials (Basel) 2021; 11:877. [PMID: 33808228 DOI: 10.3390/nano11040877] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/15/2021] [Accepted: 03/26/2021] [Indexed: 12/05/2022]
Abstract
Here, we report the fabrication and characterization of cellulose nanofiber (CNF)-based nanocomposite films reinforced with zinc oxide nanorods (ZnOs) and grapefruit seed extract (GSE). The CNF is isolated via a combination of chemical and physical methods, and the ZnO is prepared using a simple precipitation method. The ZnO and GSE are used as functional nanofillers to produce a CNF/ZnO/GSE film. Physical (morphology, chemical interactions, optical, mechanical, thermal stability, etc.) and functional (antimicrobial and antioxidant activities) film properties are tested. The incorporation of ZnO and GSE does not impact the crystalline structure, mechanical properties, or thermal stability of the CNF film. Nanocomposite films are highly transparent with improved ultraviolet blocking and vapor barrier properties. Moreover, the films exhibit effective antimicrobial and antioxidant actions. CNF/ZnO/GSE nanocomposite films with better quality and superior functional properties have many possibilities for active food packaging use.
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Yeasmin S, Yeum JH, Ji BC, Choi JH, Yang SB. Electrically Conducting Pullulan-Based Nanobiocomposites Using Carbon Nanotubes and TEMPO Cellulose Nanofibril. Nanomaterials (Basel) 2021; 11:602. [PMID: 33670897 DOI: 10.3390/nano11030602] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/19/2021] [Accepted: 02/22/2021] [Indexed: 12/29/2022]
Abstract
Hybrid nanobiocomposite films are prepared using a solution casting by incorporating TEMPO cellulose nanofibrils (TOCNs) and carbon nanotubes (CNTs) into an aqueous solution of pullulan (PULL). The presence of CNT is confirmed by XRD characterization, and the prepared film shows an increased degree of crystallinity after the addition of TOCNs and CNT. The maximum degree of crystallinity value is obtained for CNT 0.5 % (59.64%). According to the Fourier-transform infrared spectroscopy, the shifts of the characteristic -OH peak of PULL occurred after the addition of TOCNs and aqueous CNT (3306.39 to 3246.90 cm−1), confirming interaction between the TOCNs, CNTs, and PULL matrix. The prepared films show enhanced material properties including higher tensile strength (65.41 MPa at low CNT content (0.5%)), water barrier properties, and reduced moisture susceptibility (5 wt.% CNT shows the lowest value (11.28%)) compared with the neat PULL film. Additionally, the prepared films are almost biodegradable within 64 days and show excellent electrical conductivity (0.001 to 0.015 S/mm for 0.5–5% CNT), which suggests a new approach to transform natural polymers into novel advanced materials for use in the fields of biosensing and electronics.
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Roy S, Zhai L, Kim HC, Pham DH, Alrobei H, Kim J. Tannic-Acid-Cross-Linked and TiO 2-Nanoparticle-Reinforced Chitosan-Based Nanocomposite Film. Polymers (Basel) 2021; 13:E228. [PMID: 33440770 DOI: 10.3390/polym13020228] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/06/2021] [Accepted: 01/08/2021] [Indexed: 02/06/2023] Open
Abstract
A chitosan-based nanocomposite film with tannic acid (TA) as a cross-linker and titanium dioxide nanoparticles (TiO2) as a reinforcing agent was developed with a solution casting technique. TA and TiO2 are biocompatible with chitosan, and this paper studied the synergistic effect of the cross-linker and the reinforcing agent. The addition of TA enhanced the ultraviolet blocking and mechanical properties of the chitosan-based nanocomposite film. The reinforcement of TiO2 in chitosan/TA further improved the nanocomposite film's mechanical properties compared to the neat chitosan or chitosan/TA film. The thermal stability of the chitosan-based nanocomposite film was slightly enhanced, whereas the swelling ratio decreased. Interestingly, its water vapor barrier property was also significantly increased. The developed chitosan-based nanocomposite film showed potent antioxidant activity, and it is promising for active food packaging.
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Sun C, Zhu D, Jia H, Yang C, Zheng Z, Wang X. Bioinspired Hydrophobic Cellulose Nanocrystal Composite Films as Organic-Solvent-Responsive Structural-Color Rewritable Papers. ACS Appl Mater Interfaces 2020; 12:26455-26463. [PMID: 32419444 DOI: 10.1021/acsami.0c04785] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Lots of beetles, moths, and birds in the natural world present stunning unique structural colors as well as excellent hydrophobic performances. Herein, a novel bioinspired variable structural-color film with organic-solvent responsiveness and surface hydrophobicity was fabricated. Cellulose nanocrystals (CNCs) provided structural color with left-handed helicity. PEG-PPG-PEG triblock copolymers (PPPTCs) were blended with CNCs, giving rise to the organic-solvent-responsive structural color and wider red-shift window of the reflectance peak. The color of the film could be regulated repeatedly under the stimulus of cyclohexanone with an obvious red shift up to 107 nm, corresponding to a macroscopic color change from blue to yellow. Low-surface-energy compound hexadecyltrimethoxysilane (HDTMS) was covalently grafted on the surface in a one-step method to introduce hydrophobicity, successfully preventing the effect of water on the ordered nanostructure. Based on the bionics principle, the as-prepared CNC/PPPTC nanocomposite films with variable structural colors and hydrophobicity are beneficial to their prospective applications in display screens, rewritable hydrophobic structural-color-changing paper, biomimetic sensors, and so forth.
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Affiliation(s)
- Chengyuan Sun
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Dandan Zhu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Haiyan Jia
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Chongchong Yang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zhen Zheng
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xinling Wang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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Pinem MP, Wardhono EY, Nadaud F, Clausse D, Saleh K, Guénin E. Nanofluid to Nanocomposite Film: Chitosan and Cellulose-Based Edible Packaging. Nanomaterials (Basel) 2020; 10:E660. [PMID: 32252287 PMCID: PMC7221946 DOI: 10.3390/nano10040660] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/09/2020] [Accepted: 03/20/2020] [Indexed: 11/16/2022]
Abstract
Chitosan (CH)-based materials are compatible to form biocomposite film for food packaging applications. In order to enhance water resistance and mechanical properties, cellulose can be introduced to the chitosan-based film. In this work, we evaluate the morphology and water resistance of films prepared from chitosan and cellulose in their nanoscale form and study the phenomena underlying the film formation. Nanofluid properties are shown to be dependent on the particle form and drive the morphology of the prepared film. Film thickness and water resistance (in vapor or liquid phase) are clearly enhanced by the adjunction of nanocrystalline cellulose.
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Affiliation(s)
- Mekro Permana Pinem
- Chemical Engineering Department, University of Sultan Ageng Tirtayasa, Jl Jendral Sudirman km 3, Cilegon 42435, Banten, Indonesia;
- Integrated Transformations of Renewable Matter Laboratory (EA TIMR 4297 UTC-ESCOM), Sorbonne Universités, Université de Technologie de Compiègne, rue du Dr Schweitzer, 60200 Compiègne, France; (D.C.); (K.S.)
| | - Endarto Yudo Wardhono
- Chemical Engineering Department, University of Sultan Ageng Tirtayasa, Jl Jendral Sudirman km 3, Cilegon 42435, Banten, Indonesia;
| | - Frederic Nadaud
- Service d’Analyse Physico-Chimique (SAPC), Sorbonne Universités, Université de Technologie de Compiègne, rue du Dr Schweitzer, 60200 Compiègne, France;
| | - Danièle Clausse
- Integrated Transformations of Renewable Matter Laboratory (EA TIMR 4297 UTC-ESCOM), Sorbonne Universités, Université de Technologie de Compiègne, rue du Dr Schweitzer, 60200 Compiègne, France; (D.C.); (K.S.)
| | - Khashayar Saleh
- Integrated Transformations of Renewable Matter Laboratory (EA TIMR 4297 UTC-ESCOM), Sorbonne Universités, Université de Technologie de Compiègne, rue du Dr Schweitzer, 60200 Compiègne, France; (D.C.); (K.S.)
| | - Erwann Guénin
- Integrated Transformations of Renewable Matter Laboratory (EA TIMR 4297 UTC-ESCOM), Sorbonne Universités, Université de Technologie de Compiègne, rue du Dr Schweitzer, 60200 Compiègne, France; (D.C.); (K.S.)
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Ahmed A, Adak B, Bansala T, Mukhopadhyay S. Green Solvent Processed Cellulose/Graphene Oxide Nanocomposite Films with Superior Mechanical, Thermal, and Ultraviolet Shielding Properties. ACS Appl Mater Interfaces 2020; 12:1687-1697. [PMID: 31841299 DOI: 10.1021/acsami.9b19686] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study reports for the first time a green process to fabricate Lyocell fiber and graphene oxide (GO) based novel cellulose/graphene oxide nanocomposite (CGN) flexible films for ultraviolet (UV) shielding applications. A polyethelene glycol (PEG) mediated solvent system was utilized to make CGN films via solution casting route. To improve the dispersion of GO sheets in a cellulosic matrix, a reactive interface was formed in between cellulose and oxygenic functionalized groups of GO sheets via cross-linking them with epichlorohydrin (ECH). The addition of GO sheets in cellulose matrix leads to the synergistic changes, which were observed in the structure and surface morphology of CGN nanocomposite films. Enhanced dispersion of GO sheets in CGN films was observed in morphological investigations which is attributed to the adequate cellulose-GO interaction by hydrogen bonding and led to significant enhancement in the mechanical and thermal properties. The tensile strength and Young's modulus of CGN films with 2 wt % GO loading (CGN2) increased to 89 MPa and 4.3 GPa from 55.6 MPa and 2.1 GPa, respectively, as compared to the neat cellulosic film. Additionally, the CGN films exhibited remarkable UV shielding capability which increased with GO loading in a cellulose matrix. The CGN2 film (2 wt % GO loading) possessed outstanding absorbance in the wavelength range of 280 to 400 nm and showed almost complete shielding (∼99%) of UV rays in both the UV-B and the UV-A regions. Moreover, the ultraviolet protection factor of the CGN2 film demonstrated more than 80-fold increase compared to that of the neat cellulose film. The obtained CGN nanocomposite film has a high potential for applications in the field of UV protection.
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Affiliation(s)
- Abbas Ahmed
- Department of Textile and Fiber Engineering , Indian Institute of Technology , Delhi 110016 , India
| | - Bapan Adak
- Department of Textile and Fiber Engineering , Indian Institute of Technology , Delhi 110016 , India
| | - Taruna Bansala
- Artie McFerrin Department of Chemical Engineering , Texas A&M University , College Station , Texas 77843 , United States
| | - Samrat Mukhopadhyay
- Department of Textile and Fiber Engineering , Indian Institute of Technology , Delhi 110016 , India
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Ge M, Li Y, Yang Y, Wang Y, Liang G, Hu G, S M JA. Investigation on the Preparation and Properties of CMC/magadiite Nacre-Like Nanocomposite Films. Polymers (Basel) 2019; 11:E1378. [PMID: 31443463 DOI: 10.3390/polym11091378] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/09/2019] [Accepted: 08/19/2019] [Indexed: 11/17/2022] Open
Abstract
The layered hydrated sodium salt-magadiite (MAG), which has special interpenetrating petals structure, was used as a functional filler to slowly self-assemble with sodium carboxy-methylcellulose (CMC), in order to prepare nacre-like nanocomposite film by solvent evaporation method. The structure of prepared nacre-like nanocomposite film was characterized by Scanning Electron Microscope (SEM) and X-ray diffraction (XRD) analysis; whereas, it was indicated that CMC macromolecules were inserted between the layers of MAG to increase the layer spacing of MAG by forming an interpenetrating petals structure; in the meantime, the addition of MAG improved the thermal stability of CMC. The tensile strength of CMC/MAG was significantly improved compared with pure CMC. The tensile strength of CMC/MAG reached the maximum value at 1.71 MPa when the MAG content was 20%, to maintaining high transparency. Due to the high content of inorganic filler, the flame retarding performance and the thermal stability were also brilliant; hence, the great biocompatibility and excellent mechanical properties of the bionic nanocomposite films with the unique interpenetrating petals structure provided a great probability for these original composites to be widely applied in material research, such as tissue engineering in biomedical research.
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Jafarzadeh S, Rhim JW, Alias AK, Ariffin F, Mahmud S. Application of antimicrobial active packaging film made of semolina flour, nano zinc oxide and nano-kaolin to maintain the quality of low-moisture mozzarella cheese during low-temperature storage. J Sci Food Agric 2019; 99:2716-2725. [PMID: 30350410 DOI: 10.1002/jsfa.9439] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [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: 05/23/2018] [Revised: 08/21/2018] [Accepted: 10/16/2018] [Indexed: 05/27/2023]
Abstract
BACKGROUND Active food packaging films with improved properties and strong antimicrobial activity were prepared by blending mixed nanomaterials with different ratio [1:4 (40 mg:160 mg), 3:2 (120 mg: 80 mg), 0:5 (0 mg: 200 mg) and 5:0 (200 mg:0 mg)] of ZnO and kaolin with semolina using a solvent casting method and used for the packaging of low moisture mozzarella cheese to test the effect of packaging on the quality change of the cheese for long-term (up to 72 days) refrigerated storage. RESULTS Compared with the neat semolina film, mechanical strength (TS) of the nanocomposite films increased significantly (increase in 21-65%) and water vapor barrier (WVP) and O2 gas barrier (OP) properties decreased significantly (decrease in 43-50% and 60-65%, respectively) depending on the blending ratio of ZnO and kaolin nanoclay. The nanocomposite films also exhibited strong antimicrobial activity against bacteria (E. coli and S. aureus), yeast (C. albicans), and mold (A. niger). The nanocomposite packaging films were effectively prevented the growth of microorganisms (coliforms, total microbial, and fungi) of the cheese during storage at low-temperature and showed microbial growth of less than 2.5 log CFU/g after 72 days of storage compared to the control group, and the quality of the packaged cheese was still acceptable. CONCLUSION The semolina-based nanocomposite films, especially Sem/Z3 K2 film, were effective for packaging of low moisture mozzarella cheese to maintain the physicochemical properties (pH, moisture, and fat content) and quality (color, taste, texture, and overall acceptability) of the cheese as well as preventing microbial growth (coliforms, total microbial, and fungi). © 2018 Society of Chemical Industry.
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Affiliation(s)
- Shima Jafarzadeh
- Food Biopolymer Research Group, Food Technology Division, School of Industrial Technology, University Sains Malaysia, Penang, Malaysia
| | - Jong-Whan Rhim
- Department of Food and Nutrition, Center for Humanities and Sciences, Bio-nanocomposite Research Center, Kyung Hee University, Seoul, Republic of Korea
| | - Abd Karim Alias
- Food Biopolymer Research Group, Food Technology Division, School of Industrial Technology, University Sains Malaysia, Penang, Malaysia
| | - Fazilah Ariffin
- Food Biopolymer Research Group, Food Technology Division, School of Industrial Technology, University Sains Malaysia, Penang, Malaysia
| | - Shahrom Mahmud
- Nano Optoelectronic Research (NOR) Lab, School of Physics, University Sains Malaysia, Penang, Malaysia
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Wu Y, Li S, Song J, Jiang B, Chen S, Sun H, Li X. Acetylated Distarch Phosphate/Chitosan Films Reinforced with Sodium Laurate-Modified Nano-TiO 2 : Effects of Sodium Laurate Concentration. J Food Sci 2018; 83:2819-2826. [PMID: 30325500 DOI: 10.1111/1750-3841.14354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 04/13/2018] [Revised: 08/04/2018] [Accepted: 08/24/2018] [Indexed: 12/01/2022]
Abstract
Nano-titanium dioxide (TiO2 ) was modified with the surfactant sodium laurate (SL) via ultrasonic microwave-assisted technology to improve the dispersion of TiO2 in polymer matrices. As revealed by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy analyses, SL was well adsorbed onto the TiO2 surface through chemical bonding, resulting in SL-modified TiO2 (TiO2 -SLx). The hydrophobicity and dispersibility of TiO2 -SLx increased significantly compared to unmodified nano-TiO2 . With an increase in the SL concentration from 5% to 15%, the agglomeration of TiO2 -SLx particles decreased considerably, while the particles were more uniform. TiO2 -SLx nanoparticles (3 wt%) were then incorporated into acetylated distarch phosphate/chitosan (ADPS/CS) blended matrices to reinforce the biopolymers. Relative to unmodified TiO2 , TiO2 -SLx exhibited a better dispersion capability. Furthermore, as the SL concentration increased, the tensile strength (TS) of the composite films increased, while the elongation at break (E), water vapor permeability (WVP), and solubility all decreased. The composite film containing TiO2 -SL15 (TiO2 modified with 15% SL; ADPS/CS-TiO2 -SL15 film) displayed the highest TS (31.50 MPa), which was 33.70% higher than that of the pure ADPS/CS film, whereas the ADPS/CS-TiO2 -SL25 film exhibited the lowest E. Further, the ADPS/CS-TiO2 -SL15 film displayed the lowest WVP (0.90 × 10-12 g·cm-1 ·s-1 ·Pa-1 ) and solubility (22.91%), which decreased by 30.23% and 26.03% compared to that of the pure ADPS/CS film, respectively. Therefore, SL modification and the use of ultrasonic microwave-assisted technology are promising for the preparation of nanofillers for biopolymer reinforcement. PRACTICAL APPLICATION: Nano-titanium dioxide (TiO2 ) nanoparticles were modified using the anionic surfactant sodium laurate via ultrasonic-microwave assisted technology, to improve the dispersion of the TiO2 nanoparticles in polymer matrices. Modified TiO2 nanoparticles were incorporated into acetylated di-starch phosphate/Chitosan blend films, causing the tensile strength of the composite film to increase and the water solubility and water vapor permeability of the composite film to decrease, making the films suitable for packaging applications.
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Affiliation(s)
- Yuanyuan Wu
- College of Food Science and Engineering, Jilin Univ., Changchun, 130022, P. R. China
| | - Shuai Li
- College of Food Science and Engineering, Jilin Univ., Changchun, 130022, P. R. China.,College of Food Quality and Safety, Jilin Agriculture Science and Technology College, Jilin, 132101, P. R. China
| | - Jingxin Song
- College of Food Science and Engineering, Jilin Univ., Changchun, 130022, P. R. China
| | - Bingxue Jiang
- College of Food Science and Engineering, Jilin Univ., Changchun, 130022, P. R. China
| | - ShanShan Chen
- College of Food Science and Engineering, Jilin Univ., Changchun, 130022, P. R. China
| | - Huimin Sun
- College of Food Science and Engineering, Jilin Univ., Changchun, 130022, P. R. China
| | - Xinxin Li
- College of Food Science and Engineering, Jilin Univ., Changchun, 130022, P. R. China
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Tang B, Zhuang J, Wang L, Zhang B, Lin S, Jia F, Dong L, Wang Q, Cheng K, Weng W. Harnessing Cell Dynamic Responses on Magnetoelectric Nanocomposite Films to Promote Osteogenic Differentiation. ACS Appl Mater Interfaces 2018; 10:7841-7851. [PMID: 29412633 DOI: 10.1021/acsami.7b19385] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The binding of cell integrins to proteins adsorbed on the material surface is a highly dynamic process critical for guiding cellular responses. However, temporal dynamic regulation of adsorbed proteins to meet the spatial conformation requirement of integrins for a certain cellular response remains a great challenge. Here, an active CoFe2O4/poly(vinylidene fluoride-trifluoroethylene) nanocomposite film, which was demonstrated to be an obvious surface potential variation (Δ V ≈ 93 mV) in response to the applied magnetic field intensity (0-3000 Oe), was designed to harness the dynamic binding of integrin-adsorbed proteins by in situ controlling of the conformation of adsorbed proteins. Experimental investigation and molecular dynamics simulation confirmed the surface potential-induced conformational change in the adsorbed proteins. Cells cultured on nanocomposite films indicated that cellular responses in different time periods (adhesion, proliferation, and differentiation) required distinct magnetic field intensity, and synthetically programming the preferred magnetic field intensity of each time period could further enhance the osteogenic differentiation through the FAK/ERK signaling pathway. This work therefore provides a distinct concept that dynamically controllable modulation of the material surface property fitting the binding requirement of different cell time periods would be more conducive to achieving the desired osteogenic differentiation.
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Affiliation(s)
| | | | | | | | | | | | - Lingqing Dong
- The Affiliated Stomatologic Hospital, School of Medicine , Zhejiang University , Hangzhou 310003 , China
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Jiang C, Zhang D, Yin N, Yao Y, Shaymurat T, Zhou X. Acetylene Gas-Sensing Properties of Layer-by-Layer Self-Assembled Ag-Decorated Tin Dioxide/Graphene Nanocomposite Film. Nanomaterials (Basel) 2017; 7:nano7090278. [PMID: 28927021 PMCID: PMC5618389 DOI: 10.3390/nano7090278] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 09/10/2017] [Accepted: 09/14/2017] [Indexed: 11/16/2022]
Abstract
This paper demonstrates an acetylene gas sensor based on an Ag-decorated tin dioxide/reduced graphene oxide (Ag–SnO2/rGO) nanocomposite film, prepared by layer-by-layer (LbL) self-assembly technology. The as-prepared Ag–SnO2/rGO nanocomposite was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectrum. The acetylene sensing properties were investigated using different working temperatures and gas concentrations. An optimal temperature of 90 °C was determined, and the Ag–SnO2/rGO nanocomposite sensor exhibited excellent sensing behaviors towards acetylene, in terms of response, repeatability, stability and response/recovery characteristics, which were superior to the pure SnO2 and SnO2/rGO film sensors. The sensing mechanism of the Ag–SnO2/rGO sensor was attributed to the synergistic effect of the ternary nanomaterials, and the heterojunctions created at the interfaces between SnO2 and rGO. This work indicates that the Ag–SnO2/rGO nanocomposite is a good candidate for constructing a low-temperature acetylene sensor.
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Affiliation(s)
- Chuanxing Jiang
- College of Information and Control Engineering, China University of Petroleum (East China), Qingdao 266580, China.
| | - Dongzhi Zhang
- College of Information and Control Engineering, China University of Petroleum (East China), Qingdao 266580, China.
| | - Nailiang Yin
- College of Information and Control Engineering, China University of Petroleum (East China), Qingdao 266580, China.
| | - Yao Yao
- College of Communication Engineering, Chengdu University of Information Technology, Chengdu 610225, China.
| | - Talgar Shaymurat
- Key Laboratory of New Energy and Materials Research, Xinjiang Institute of Engineering, Urumqi 83000, China.
| | - Xiaoyan Zhou
- College of Science, China University of Petroleum (East China), Qingdao 266580, China.
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Li K, Jin S, Han Y, Li J, Chen H. Improvement in Functional Properties of Soy Protein Isolate-Based Film by Cellulose Nanocrystal⁻Graphene Artificial Nacre Nanocomposite. Polymers (Basel) 2017; 9:E321. [PMID: 30970998 PMCID: PMC6418927 DOI: 10.3390/polym9080321] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 07/11/2017] [Revised: 07/23/2017] [Accepted: 07/25/2017] [Indexed: 12/31/2022] Open
Abstract
A facile, inexpensive, and green approach for the production of stable graphene dispersion was proposed in this study. We fabricated soy protein isolate (SPI)-based nanocomposite films with the combination of 2D negative charged graphene and 1D positive charged polyethyleneimine (PEI)-modified cellulose nanocrystals (CNC) via a layer-by-layer assembly method. The morphologies and surface charges of graphene sheets and CNC segments were characterized by atomic force microscopy and Zeta potential measurements. The hydrogen bonds and multiple interface interactions between the filler and SPI matrix were analyzed by Attenuated Total Reflectance⁻Fourier Transform Infrared spectra and X-ray diffraction patterns. Scanning electron microscopy demonstrated the cross-linked and laminated structures in the fracture surface of the films. In comparison with the unmodified SPI film, the tensile strength and surface contact angles of the SPI/graphene/PEI-CNC film were significantly improved, by 99.73% and 37.13% respectively. The UV⁻visible light barrier ability, water resistance, and thermal stability were also obviously enhanced. With these improved functional properties, this novel bio-nanocomposite film showed considerable potential for application for food packaging materials.
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Affiliation(s)
- Kuang Li
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Shicun Jin
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Yufei Han
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Jianzhang Li
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Hui Chen
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
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Li K, Jin S, Liu X, Chen H, He J, Li J. Preparation and Characterization of Chitosan/Soy Protein Isolate Nanocomposite Film Reinforced by Cu Nanoclusters. Polymers (Basel) 2017; 9:E247. [PMID: 30970924 PMCID: PMC6432471 DOI: 10.3390/polym9070247] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [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: 05/26/2017] [Revised: 06/17/2017] [Accepted: 06/23/2017] [Indexed: 12/24/2022] Open
Abstract
Soy protein isolate (SPI) based films have received considerable attention for use in packaging materials. However, SPI-based films exhibit relatively poor mechanical properties and water resistance ability. To tackle these challenges, chitosan (CS) and endogenous Cu nanoclusters (NCs) capped with protein were proposed and designed to modify SPI-based films. Attenuated total reflectance-Fourier transform infrared spectroscopy and X-ray diffraction patterns of composite films demonstrated that interactions, such as hydrogen bonds in the film forming process, promoted the cross-linking of composite films. The surface microstructure of CS/SPI films modified with Cu NCs was more uniform and transmission electron microscopy (TEM) showed that uniform and discrete clusters were formed. Compared with untreated SPI films, the tensile strength and elongation at break of composite films were simultaneously improved by 118.78% and 74.93%, respectively. Moreover, these composite films also exhibited higher water contact angle and degradation temperature than that of pure SPI film. The water vapor permeation of the modified film also decreased. These improved properties of functional bio-polymers show great potential as food packaging materials.
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Affiliation(s)
- Kuang Li
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Shicun Jin
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Xiaorong Liu
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Hui Chen
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Jing He
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Jianzhang Li
- Key Laboratory of Wood Materials Science and Utilization, Beijing Forestry University, Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
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Li K, Jin S, Chen H, He J, Li J. A High-Performance Soy Protein Isolate-Based Nanocomposite Film Modified with Microcrystalline Cellulose and Cu and Zn Nanoclusters. Polymers (Basel) 2017; 9:E167. [PMID: 30970846 PMCID: PMC6432157 DOI: 10.3390/polym9050167] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [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: 03/31/2017] [Revised: 05/01/2017] [Accepted: 05/03/2017] [Indexed: 12/05/2022] Open
Abstract
Soy protein isolate (SPI)-based materials are abundant, biocompatible, renewable, and biodegradable. In order to improve the tensile strength (TS) of SPI films, we prepared a novel composite film modified with microcrystalline cellulose (MCC) and metal nanoclusters (NCs) in this study. The effects of the modification of MCC on the properties of SPI-Cu NCs and SPI-Zn NCs films were investigated. Attenuated total reflectance-Fourier transformed infrared spectroscopy analyses and X-ray diffraction patterns characterized the strong interactions and reduction of the crystalline structure of the composite films. Scanning electron microscopy (SEM) showed the enhanced cross-linked and entangled structure of modified films. Compared with an untreated SPI film, the tensile strength of the SPI-MCC-Cu and SPI-MCC-Zn films increased from 2.91 to 13.95 and 6.52 MPa, respectively. Moreover, the results also indicated their favorable water resistance with a higher water contact angle. Meanwhile, the composite films exhibited increased initial degradation temperatures, demonstrating their higher thermostability. The results suggested that MCC could effectively improve the performance of SPI-NCs films, which would provide a novel preparation method for environmentally friendly SPI-based films in the applications of packaging materials.
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Affiliation(s)
- Kuang Li
- Key Laboratory of Wood Material Science and Utilization, Beijing Forestry University, Beijing 100083, China.
- Ministry of Education, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Shicun Jin
- Key Laboratory of Wood Material Science and Utilization, Beijing Forestry University, Beijing 100083, China.
- Ministry of Education, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Hui Chen
- Key Laboratory of Wood Material Science and Utilization, Beijing Forestry University, Beijing 100083, China.
- Ministry of Education, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Jing He
- Key Laboratory of Wood Material Science and Utilization, Beijing Forestry University, Beijing 100083, China.
- Ministry of Education, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Jianzhang Li
- Key Laboratory of Wood Material Science and Utilization, Beijing Forestry University, Beijing 100083, China.
- Ministry of Education, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
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Her SC, Chien PC. Fracture Analysis of MWCNT/Epoxy Nanocomposite Film Deposited on Aluminum Substrate. Materials (Basel) 2017; 10:E408. [PMID: 28772768 DOI: 10.3390/ma10040408] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 04/09/2017] [Accepted: 04/11/2017] [Indexed: 11/22/2022]
Abstract
Multi-walled carbon nanotube (MWCNT) reinforced epoxy films were deposited on an aluminum substrate by a hot-pressing process. Three-point bending tests were performed to determine the Young’s modulus of MWCNT reinforced nanocomposite films. Compared to the neat epoxy film, nanocomposite film with 1 wt % of MWCNT exhibits an increase of 21% in the Young’s modulus. Four-point-bending tests were conducted to investigate the fracture toughness of the MWCNT/epoxy nanocomposite film deposited on an aluminum substrate with interfacial cracks. Based on the Euler-Bernoulli beam theory, the strain energy in a film/substrate composite beam is derived. The difference of strain energy before and after the propagation of the interfacial crack are calculated, leading to the determination of the strain energy release rate. Experimental test results show that the fracture toughness of the nanocomposite film deposited on the aluminum substrate increases with the increase in the MWCNT content.
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Zhang D, Jiang C, Li P, Sun Y. Layer-by-Layer Self-assembly of Co 3O 4 Nanorod-Decorated MoS 2 Nanosheet-Based Nanocomposite toward High-Performance Ammonia Detection. ACS Appl Mater Interfaces 2017; 9:6462-6471. [PMID: 28140565 DOI: 10.1021/acsami.6b15669] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
This article is the first demonstration of a molybdenum disulfide (MoS2)/tricobalt tetraoxide (Co3O4) nanocomposite film sensor toward NH3 detection. The MoS2/Co3O4 film sensor was fabricated on a substrate with interdigital electrodes via layer-by-layer self-assembly route. The surface morphology, nanostructure, and elemental composition of the MoS2/Co3O4 samples were examined by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy-dispersive spectrometry, and X-ray photoelectron spectroscopy. The characterization results confirmed its successful preparation and rationality. The NH3 sensing properties of the sensor for ultra-low-concentration detection were investigated at room temperature. The experimental results revealed that high sensitivity, good repeatability, stability, and selectivity and fast response/recovery characteristics were achieved by the sensor toward NH3. Moreover, the MoS2/Co3O4 nanocomposite film sensor exhibited significant enhancement in ammonia-sensing properties in comparison with the MoS2 and Co3O4 counterparts. The underlying sensing mechanisms of the MoS2/Co3O4 nanocomposite toward ammonia were ascribed to the layered nanostructure, synergistic effect, and heterojunction created at the interface of n-type MoS2 and p-type Co3O4. The synthesized MoS2/Co3O4 nanocomposite proved to be an excellent candidate for constructing high-performance ammonia sensor for various applications.
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Affiliation(s)
- Dongzhi Zhang
- College of Information and Control Engineering, China University of Petroleum (East China) , Qingdao 266580, P.R. China
| | - Chuanxing Jiang
- College of Information and Control Engineering, China University of Petroleum (East China) , Qingdao 266580, P.R. China
| | - Peng Li
- State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University , Beijing 100084, P.R. China
| | - Yan'e Sun
- College of Information and Control Engineering, China University of Petroleum (East China) , Qingdao 266580, P.R. China
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Falamarzpour P, Behzad T, Zamani A. Preparation of Nanocellulose Reinforced Chitosan Films, Cross-Linked by Adipic Acid. Int J Mol Sci 2017; 18:E396. [PMID: 28208822 DOI: 10.3390/ijms18020396] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/25/2017] [Accepted: 02/06/2017] [Indexed: 11/17/2022] Open
Abstract
Adipic acid, an abundant and nontoxic compound, was used to dissolve and cross-link chitosan. After the preparation of chitosan films through casting technique, the in situ amidation reaction was performed at 80-100 °C as verified by Fourier transform infrared (FT-IR). The reaction was accompanied by the release of water which was employed to investigate the reaction kinetics. Accordingly, the reaction rate followed the first-order model and Arrhenius equation, and the activation energy was calculated to be 18 kJ/mol. Furthermore, the mechanical properties of the chitosan films were comprehensively studied. First, optimal curing conditions (84 °C, 93 min) were introduced through a central composite design. In order to evaluate the effects of adipic acid, the mechanical properties of physically cross-linked (uncured), chemically cross-linked (cured), and uncross-linked (prepared by acetic acid) films were compared. The use of adipic acid improved the tensile strength of uncured and chemically cross-linked films more than 60% and 113%, respectively. Finally, the effect of cellulose nanofibrils (CNFs) on the mechanical performance of cured films, in the presence of glycerol as a plasticizer, was investigated. The plasticized chitosan films reinforced by 5 wt % CNFs showed superior properties as a promising material for the development of chitosan-based biomaterials.
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Sullivan EM, Moon RJ, Kalaitzidou K. Processing and Characterization of Cellulose Nanocrystals/Polylactic Acid Nanocomposite Films. Materials (Basel) 2015; 8:8106-16. [PMID: 28793701 DOI: 10.3390/ma8125447] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 10/30/2015] [Accepted: 11/23/2015] [Indexed: 11/17/2022]
Abstract
The focus of this study is to examine the effect of cellulose nanocrystals (CNC) on the properties of polylactic acid (PLA) films. The films are fabricated via melt compounding and melt fiber spinning followed by compression molding. Film fracture morphology, thermal properties, crystallization behavior, thermo-mechanical behavior, and mechanical behavior were determined as a function of CNC content using scanning electron microscopy, differential scanning calorimetry, X-ray diffraction, dynamic mechanical analysis, and tensile testing. Film crystallinity increases with increasing CNC content indicating CNC act as nucleating agents, promoting crystallization. Furthermore, the addition of CNC increased the film storage modulus and slightly broadened the glass transition region.
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Li Y, Liu Y, Gao T, Zhang B, Song Y, Terrell JL, Barber N, Bentley WE, Takeuchi I, Payne GF, Wang Q. Self-assembly with orthogonal-imposed stimuli to impart structure and confer magnetic function to electrodeposited hydrogels. ACS Appl Mater Interfaces 2015; 7:10587-10598. [PMID: 25923335 DOI: 10.1021/acsami.5b02339] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A magnetic nanocomposite film with the capability of reversibly collecting functionalized magnetic particles was fabricated by simultaneously imposing two orthogonal stimuli (electrical and magnetic). We demonstrate that cathodic codeposition of chitosan and Fe3O4 nanoparticles while simultaneously applying a magnetic field during codeposition can (i) organize structure, (ii) confer magnetic properties, and (iii) yield magnetic films that can perform reversible collection/assembly functions. The magnetic field triggered the self-assembly of Fe3O4 nanoparticles into hierarchical "chains" and "fibers" in the chitosan film. For controlled magnetic properties, the Fe3O4-chitosan film was electrodeposited in the presence of various strength magnetic fields and different deposition times. The magnetic properties of the resulting films should enable broad applications in complex devices. As a proof of concept, we demonstrate the reversible capture and release of green fluorescent protein (EGFP)-conjugated magnetic microparticles by the magnetic chitosan film. Moreover, antibody-functionalized magnetic microparticles were applied to capture cells from a sample, and these cells were collected, analyzed, and released by the magnetic chitosan film, paving the way for applications such as reusable biosensor interfaces (e.g., for pathogen detection). To our knowledge, this is the first report to apply a magnetic field during the electrodeposition of a hydrogel to generate magnetic soft matter. Importantly, the simple, rapid, and reagentless fabrication methodologies demonstrated here are valuable features for creating a magnetic device interface.
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Fu F, Li L, Liu L, Cai J, Zhang Y, Zhou J, Zhang L. Construction of cellulose based ZnO nanocomposite films with antibacterial properties through one-step coagulation. ACS Appl Mater Interfaces 2015; 7:2597-606. [PMID: 25569533 DOI: 10.1021/am507639b] [Citation(s) in RCA: 134] [Impact Index Per Article: 14.9] [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: 05/23/2023]
Abstract
Cellulose based ZnO nanocomposite (RCZ) films were prepared from cellulose carbamate-NaOH/ZnO solutions through one-step coagulation in Na2SO4 aqueous solutions. The structure and properties of RCZ films were characterized using XRD, FTIR, XPS, SEM, TEM, TG, tensile testing, and antibacterial activity tests. The content of ZnO in RCZ films was obtained in the range of 2.7-15.1 wt %. ZnO nanoparticles with a hexagonal wurtzite structure agglomerated into large particles, which firmly embedded in the cellulose matrix. RCZ films displayed good mechanical properties and high thermal stability. Moreover, the films exhibited excellent UV-blocking properties and antibacterial activities against Staphylococcus aureus and Escherichia coli. A dramatic reduction in viable bacteria was observed within 3 h of exposure, while all of the bacteria were killed within 6 h. This work provided a novel and simple pathway for the preparation of regenerated cellulose films with ZnO nanoparticles for application as functional biomaterials.
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Affiliation(s)
- Feiya Fu
- Department of Chemistry and Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University , Luojia Hill, Wuhan 430072, China
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