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Xu Y, Ye Z, Zhao G, Fei Q, Chen Z, Li J, Yang M, Ren Y, Berigan B, Ling Y, Qian X, Shi L, Ozden I, Xie J, Gao W, Chen PY, Yan Z. Phase-separated porous nanocomposite with ultralow percolation threshold for wireless bioelectronics. NATURE NANOTECHNOLOGY 2024:10.1038/s41565-024-01658-6. [PMID: 38684805 DOI: 10.1038/s41565-024-01658-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 03/25/2024] [Indexed: 05/02/2024]
Abstract
Realizing the full potential of stretchable bioelectronics in wearables, biomedical implants and soft robotics necessitates conductive elastic composites that are intrinsically soft, highly conductive and strain resilient. However, existing composites usually compromise electrical durability and performance due to disrupted conductive paths under strain and rely heavily on a high content of conductive filler. Here we present an in situ phase-separation method that facilitates microscale silver nanowire assembly and creates self-organized percolation networks on pore surfaces. The resultant nanocomposites are highly conductive, strain insensitive and fatigue tolerant, while minimizing filler usage. Their resilience is rooted in multiscale porous polymer matrices that dissipate stress and rigid conductive fillers adapting to strain-induced geometry changes. Notably, the presence of porous microstructures reduces the percolation threshold (Vc = 0.00062) by 48-fold and suppresses electrical degradation even under strains exceeding 600%. Theoretical calculations yield results that are quantitatively consistent with experimental findings. By pairing these nanocomposites with near-field communication technologies, we have demonstrated stretchable wireless power and data transmission solutions that are ideal for both skin-interfaced and implanted bioelectronics. The systems enable battery-free wireless powering and sensing of a range of sweat biomarkers-with less than 10% performance variation even at 50% strain. Ultimately, our strategy offers expansive material options for diverse applications.
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Affiliation(s)
- Yadong Xu
- Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, USA
- Andrew and Peggy Cherng Department of Medical Engineering, Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA
| | - Zhilu Ye
- Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Ganggang Zhao
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO, USA
| | - Qihui Fei
- Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, USA
| | - Zehua Chen
- Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, USA
| | - Jiahong Li
- Andrew and Peggy Cherng Department of Medical Engineering, Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA
| | - Minye Yang
- Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Yichong Ren
- Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Benton Berigan
- Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, USA
| | - Yun Ling
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO, USA
| | - Xiaoyan Qian
- Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, USA
| | - Lin Shi
- Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, USA
| | - Ilker Ozden
- Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, USA
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, USA
| | - Wei Gao
- Andrew and Peggy Cherng Department of Medical Engineering, Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA.
| | - Pai-Yen Chen
- Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, IL, USA.
| | - Zheng Yan
- Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, USA.
- Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO, USA.
- Materials Science and Engineering Institute, University of Missouri, Columbia, MO, USA.
- NextGen Precision Health, University of Missouri, Columbia, MO, USA.
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2
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Pradyasti A, Kim HJ, Hyun WJ, Kim MH. Cellulose/GO monolith covered with Pd-Pt bimetallic nanocrystals for continuous-flow catalytic reduction of hexavalent chromium. Carbohydr Polym 2024; 330:121837. [PMID: 38368114 DOI: 10.1016/j.carbpol.2024.121837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 01/14/2024] [Accepted: 01/16/2024] [Indexed: 02/19/2024]
Abstract
Cellulose monolith materials have interconnected open porous structures with very high porosity, making them attractive structures for use as support materials in heterogeneous catalysis applications. In this study, we developed a highly efficient and reusable continuous-flow reactor for Cr(VI) remediation by combining the advantageous features of cellulose monoliths with suitable reinforcement techniques. We fabricated a porous monolithic cellulose/graphene oxide (GO) composite with a continuous three-dimensional skeletal framework using the thermally induced phase separation technique. Pd nanocrystals were synthesized in situ on the surface of the composite monolith, and then converted to porous Pd-Pt bimetallic nanocrystals through a galvanic replacement reaction. This approach eliminated the need for additional reductants and stabilizers, making the process simpler and more environmentally friendly. Under carefully optimized conditions, the cellulose/GO/Pd-Pt nanocomposite monolith exhibited outstanding performance in continuous-flow reactions for Cr(VI) reduction, achieving a maximum conversion rate of 98 %. Moreover, the nanocomposite monolith-based heterogeneous catalyst exhibited remarkable long-term stability, maintaining its catalytic activity even after extended periods of storage in the dried state. These findings highlight the potential of cellulose-based composite monoliths as versatile and robust support materials for heterogeneous catalysis.
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Affiliation(s)
- Astrini Pradyasti
- Department of Polymer Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea
| | - Hyeon Jin Kim
- Department of Polymer Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea
| | - Woo Jin Hyun
- Department of Materials Science and Engineering, Guangdong Technion - Israel Institute of Technology, 241 Daxue Road, Jinping District, Shantou, Guangdong 515063, China
| | - Mun Ho Kim
- Department of Polymer Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea.
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3
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Lee D, Noh J, Moon SY, Shin TJ, Choi YK, Park J. Pectin Nanoporous Structures Prepared via Salt-Induced Phase Separation and Ambient Azeotropic Evaporation Processes. Biomacromolecules 2024; 25:1709-1723. [PMID: 38377481 DOI: 10.1021/acs.biomac.3c01230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Polysaccharide nanoporous structures are suitable for various applications, ranging from biomedical scaffolds to adsorption materials, owing to their biocompatibility and large surface areas. Pectin, in particular, can create 3D nanoporous structures in aqueous solutions by binding with calcium cations and creating nanopores by phase separation; this process involves forming hydrogen bonds between alcohols and pectin chains in water and alcohol mixtures and the resulting penetration of alcohols into calcium-bound pectin gels. However, owing to the dehydration and condensation of polysaccharide chains during drying, it has proven to be challenging to maintain the 3D nanoporous structure without using a freeze-drying process or supercritical fluid. Herein, we report a facile method for creating polysaccharide-based xerogels, involving the co-evaporation of water with a nonsolvent (e.g., a low-molecular-weight hydrophobic alcohol such as isopropyl or n-propyl alcohol) at ambient conditions. Experiments and coarse-grained molecular dynamics simulations confirmed that salt-induced phase separation and hydrogen bonding between hydrophobic alcohols and pectin chains were the dominant processes in mixtures of pectin, water, and hydrophobic alcohols. Furthermore, the azeotropic evaporation of water and alcohol mixed in approximately 1:1 molar ratios was maintained during the natural drying process under ambient conditions, preventing the hydration and aggregation of the hydrophilic pectin chains. These results introduce a simple and convenient process to produce 3D polysaccharide xerogels under ambient conditions.
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Affiliation(s)
- Dabin Lee
- Department of Chemical Engineering, Department of Intelligent Energy and Industry, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Juran Noh
- Department of Material Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Su-Young Moon
- Gas & Carbon Convergent Research Center, Chemical & Process Technology, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Tae Joo Shin
- UNIST Central Research Facilities & School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Yeol Kyo Choi
- Departments of Biological Sciences and Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Juhyun Park
- Department of Chemical Engineering, Department of Intelligent Energy and Industry, Chung-Ang University, Seoul 06974, Republic of Korea
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4
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Ren J, Kong R, Wang H, Du S, Liu P, Wang H, Chen Y, Xie G, Zhang L, Zhu J. Robust Underwater Adhesion of Catechol-Functionalized Polymer Triggered by Water Exchange. SMALL METHODS 2023; 7:e2201235. [PMID: 36855188 DOI: 10.1002/smtd.202201235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 02/13/2023] [Indexed: 06/09/2023]
Abstract
Adhesives with strong and stable underwater adhesion performance play a critical role in industrial and biomedical fields. However, achieving strong underwater adhesion, especially in flowing aqueous and blood environments, remains challenging. In this work, a novel solvent-exchange-triggered adhesive of catechol-functionalized polyethylenimine ethoxylated is presented. The authors show that the dimethyl sulfoxide (DMSO) solution of the catechol-functionalized polymer can be directly applied to various substrates and exhibits robust dry/underwater adhesion performance induced through in situ liquid-to-solid phase transition triggered by water-DMSO solvent exchange. The adhesive can even strongly bond low-surface-energy substrates (e.g., > 86 kPa for polytetrafluoroethylene) in diverse environments, including deionized water, air, phosphate-buffered saline solution, seawater, and aqueous conditions with different pH values. Moreover, the adhesive exhibits strong adhesion to biological tissues and can be used as a hemostatic sealant to prevent bleeding from arteries and severe trauma to the viscera. The adhesives developed in this study with strong dry/underwater adhesion performance and excellent hemostatic capabilities display enormous application prospects in the biomedical fields.
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Affiliation(s)
- Jingli Ren
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Ruixia Kong
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Huiying Wang
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Shuo Du
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Pei Liu
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Hua Wang
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Yu Chen
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Ge Xie
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Lianbin Zhang
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Jintao Zhu
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
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Farzaneh Kalourazi S, Wang F, Zhang H, Selzer M, Nestler B. Phase-field simulation for the formation of porous microstructures due to phase separation in polymer solutions on substrates with different wettabilities. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:444003. [PMID: 35985313 DOI: 10.1088/1361-648x/ac8b4d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
The porous microstructure has been widely observed in a variety of polymer solutions that have been broadly applied in many industry fields. Phase separation is one of the common mechanisms for the formation of the porous microstructure in binary polymeric mixtures. Previous studies for the formation of porous microstructures mostly focus on the separation of the bulk phase. However, there is a paucity of investigation for the phase separation of polymer mixtures contacting the solid substrate. When the polymeric liquid mixtures interact with the solid substrate, the wetting boundary condition has to be taken into account. In this work, we present a phase-field model which is coupled with the wetting boundary condition to study the phase separation in binary polymer solutions. Our consideration is based on the polymerization-induced phase separation, and thermally induced phase separation by using the Flory-Huggins model. By taking the wetting effect into account, we find that polymer droplets spontaneously occur in the microstructure, even though the bulk composition is outside the spinodal region. This phenomenon is caused by the surface composition resulting from the wetting effect that was often overlooked in literature. For the phase separation in the binary polymer mixture, we also study the impact of the temperature gradient on the microstructural evolution. The porosity, the number of droplets, and the mean radius of the droplets are rationalized with the temperature gradient.
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Affiliation(s)
- Saeideh Farzaneh Kalourazi
- Institute of Applied Materials-Microstructure Modelling and Simulation, Karlsruhe Institute of Technology, Straße am Forum 7, Karlsruhe 76131, Germany
| | - Fei Wang
- Institute of Applied Materials-Microstructure Modelling and Simulation, Karlsruhe Institute of Technology, Straße am Forum 7, Karlsruhe 76131, Germany
| | - Haodong Zhang
- Institute of Applied Materials-Microstructure Modelling and Simulation, Karlsruhe Institute of Technology, Straße am Forum 7, Karlsruhe 76131, Germany
| | - Michael Selzer
- Institute of Applied Materials-Microstructure Modelling and Simulation, Karlsruhe Institute of Technology, Straße am Forum 7, Karlsruhe 76131, Germany
- Institute of Digital Materials Science, Karlsruhe University of Applied Sciences, Moltkestraße 30, Karlsruhe 76133, Germany
| | - Britta Nestler
- Institute of Applied Materials-Microstructure Modelling and Simulation, Karlsruhe Institute of Technology, Straße am Forum 7, Karlsruhe 76131, Germany
- Institute of Digital Materials Science, Karlsruhe University of Applied Sciences, Moltkestraße 30, Karlsruhe 76133, Germany
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6
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Naga N, Ito M, Mezaki A, Tang HC, Chang TFM, Sone M, Nageh H, Nakano T. Morphology Control and Metallization of Porous Polymers Synthesized by Michael Addition Reactions of a Multi-Functional Acrylamide with a Diamine. MATERIALS (BASEL, SWITZERLAND) 2021; 14:800. [PMID: 33572043 PMCID: PMC7915525 DOI: 10.3390/ma14040800] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/28/2021] [Accepted: 02/02/2021] [Indexed: 12/02/2022]
Abstract
Porous polymers have been synthesized by an aza-Michael addition reaction of a multi-functional acrylamide, N,N',N″,N‴-tetraacryloyltriethylenetetramine (AM4), and hexamethylene diamine (HDA) in H2O without catalyst. Reaction conditions, such as monomer concentration and reaction temperature, affected the morphology of the resulting porous structures. Connected spheres, co-continuous monolithic structures and/or isolated holes were observed on the surface of the porous polymers. These structures were formed by polymerization-induced phase separation via spinodal decomposition or highly internal phase separation. The obtained porous polymers were soft and flexible and not breakable by compression. The porous polymers adsorbed various solvents. An AM4-HDA porous polymer could be plated by Ni using an electroless plating process via catalyzation by palladium (II) acetylacetonate following reduction of Ni ions in a plating solution. The intermediate Pd-catalyzed porous polymer promoted the Suzuki-Miyaura cross coupling reaction of 4-bromoanisole and phenylboronic acid.
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Affiliation(s)
- Naofumi Naga
- Department of Applied Chemistry, College of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan;
- Graduate School of Engineering and Science, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan;
| | - Minako Ito
- Graduate School of Engineering and Science, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan;
| | - Aya Mezaki
- Department of Applied Chemistry, College of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan;
| | - Hao-Chun Tang
- Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan; (H.-C.T.); (T.-F.M.C.); (M.S.)
| | - Tso-Fu Mark Chang
- Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan; (H.-C.T.); (T.-F.M.C.); (M.S.)
| | - Masato Sone
- Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan; (H.-C.T.); (T.-F.M.C.); (M.S.)
| | - Hassan Nageh
- Institute for Catalysis and Graduate, School of Chemical Sciences and Engineering, Hokkaido University, N 21, W 10, Kita-ku, Sapporo 001-0021, Japan; (H.N.); (T.N.)
| | - Tamaki Nakano
- Institute for Catalysis and Graduate, School of Chemical Sciences and Engineering, Hokkaido University, N 21, W 10, Kita-ku, Sapporo 001-0021, Japan; (H.N.); (T.N.)
- Integrated Research Consortium on Chemical Sciences, Institute for Catalysis, Hokkaido University, N 21, W 10, Kita-ku, Sapporo 001-0021, Japan
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7
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Babiarczuk B, Lewandowski D, Szczurek A, Kierzek K, Meffert M, Gerthsen D, Kaleta J, Krzak J. Novel approach of silica-PVA hybrid aerogel synthesis by simultaneous sol-gel process and phase separation. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2020.104997] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Chen L, Ahmed AMQ, Deng Y, Cao D, Du H, Cui J, Lee BJ, Cao Q. Novel triptorelin acetate-loaded microspheres prepared by a liquid/oil/oil method with high encapsulation efficiency and low initial burst release. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101390] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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9
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Harada N, Nakamura JI, Uyama H. Preparation of Macroporous Cellulose Beads through a Single-Step Non-Solvent Induced Phase Separation Method from a Cellulose Acetate Solution. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190078] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nobuyuki Harada
- Nippon Shokubai Research Alliance Laboratories, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Jun-ichi Nakamura
- Nippon Shokubai Research Alliance Laboratories, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Research Center, Nippon Shokubai Co. Ltd., 5-8 Nishi Otabi-cho, Suita, Osaka 564-0034, Japan
| | - Hiroshi Uyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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Zhu F, Liu J, Zhao H, Li J, Li Q, Xi Y, Liu M, Wang C. Preparation and Performance of Porous Polyetherimide/Al
2
O
3
Separator for Enhanced Lithium‐Sulfur Batteries. ChemElectroChem 2019. [DOI: 10.1002/celc.201900426] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fangfang Zhu
- School of Metallurgy and EnvironmentCental South University Hunan, Changsha 410083 China
| | - Jiuqing Liu
- School of Metallurgy and EnvironmentCental South University Hunan, Changsha 410083 China
| | - Haijun Zhao
- School of Metallurgy and EnvironmentCental South University Hunan, Changsha 410083 China
| | - Jie Li
- School of Metallurgy and EnvironmentCental South University Hunan, Changsha 410083 China
| | - Qihou Li
- School of Metallurgy and EnvironmentCental South University Hunan, Changsha 410083 China
| | - Yang Xi
- School of Metallurgy and EnvironmentCental South University Hunan, Changsha 410083 China
| | - Meng Liu
- School of Metallurgy and EnvironmentCental South University Hunan, Changsha 410083 China
| | - Cheng Wang
- School of Metallurgy and EnvironmentCental South University Hunan, Changsha 410083 China
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11
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He C, Liu J, Li J, Zhu F, Zhao H. Blending based polyacrylonitrile/poly(vinyl alcohol) membrane for rechargeable lithium ion batteries. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.05.013] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Chinyerenwa AC, Wang H, Zhang Q, Zhuang Y, Munna KH, Ying C, Yang H, Xu W. Structure and thermal properties of porous polylactic acid membranes prepared via phase inversion induced by hot water droplets. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.03.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Sun X, Xin Y, Wang X, Uyama H. Functionalized acetoacetylated poly(vinyl alcohol) monoliths for enzyme immobilization: a phase separation method. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4160-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Sun X, Wang K, Shu Y, Zou F, Zhang B, Sun G, Uyama H, Wang X. One-Pot Route towards Active TiO₂ Doped Hierarchically Porous Cellulose: Highly Efficient Photocatalysts for Methylene Blue Degradation. MATERIALS 2017; 10:ma10040373. [PMID: 28772734 PMCID: PMC5506969 DOI: 10.3390/ma10040373] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 03/25/2017] [Accepted: 03/28/2017] [Indexed: 12/04/2022]
Abstract
In this study, novel photocatalyst monolith materials were successfully fabricated by a non-solvent induced phase separation (NIPS) technique. By adding a certain amount of ethyl acetate (as non-solvent) into a cellulose/LiCl/N,N-dimethylacetamide (DMAc) solution, and successively adding titanium dioxide (TiO2) nanoparticles (NPs), cellulose/TiO2 composite monoliths with hierarchically porous structures were easily formed. The obtained composite monoliths possessed mesopores, and two kinds of macropores. Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD), Brunauer-Emmett-Teller (BET), and Ultraviolet-visible Spectroscopy (UV-Vis) measurements were adopted to characterize the cellulose/TiO2 composite monolith. The cellulose/TiO2 composite monoliths showed high efficiency of photocatalytic activity in the decomposition of methylene blue dye, which was decomposed up to 99% within 60 min under UV light. Moreover, the composite monoliths could retain 90% of the photodegradation efficiency after 10 cycles. The novel NIPS technique has great potential for fabricating recyclable photocatalysts with highly efficiency.
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Affiliation(s)
- Xiaoxia Sun
- College of Textiles, Donghua University, Shanghai 201620, China.
- Key Laboratory of Textile Science & Technology of Eco-Textile, Ministry of Education, Donghua University, Shanghai 201620, China.
- Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China.
| | - Kunpeng Wang
- College of Textiles, Donghua University, Shanghai 201620, China.
| | - Yu Shu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan.
| | - Fangdong Zou
- College of Textiles, Donghua University, Shanghai 201620, China.
| | - Boxing Zhang
- South China Advanced Institute for Soft Matter Science and Technology, South China University of Technology, Guangzhou 510641, China.
| | - Guangwu Sun
- School of Fashion Technology, Shanghai University of Engineering Science, Shanghai 201620, China.
| | - Hiroshi Uyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan.
| | - Xinhou Wang
- College of Textiles, Donghua University, Shanghai 201620, China.
- Key Laboratory of Textile Science & Technology of Eco-Textile, Ministry of Education, Donghua University, Shanghai 201620, China.
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