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Electrospun Nanofiber-Based Membranes for Water Treatment. Polymers (Basel) 2022; 14:polym14102004. [PMID: 35631886 PMCID: PMC9144434 DOI: 10.3390/polym14102004] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/06/2022] [Accepted: 05/10/2022] [Indexed: 02/06/2023] Open
Abstract
Water purification and water desalination via membrane technology are generally deemed as reliable supplementaries for abundant potable water. Electrospun nanofiber-based membranes (ENMs), benefitting from characteristics such as a higher specific surface area, higher porosity, lower thickness, and possession of attracted broad attention, has allowed it to evolve into a promising candidate rapidly. Here, great attention is placed on the current status of ENMs with two categories according to the roles of electrospun nanofiber layers: (i) nanofiber layer serving as a selective layer, (ii) nanofiber layer serving as supporting substrate. For the nanofiber layer’s role as a selective layer, this work presents the structures and properties of conventional ENMs and mixed matrix ENMs. Fabricating parameters and adjusting approaches such as polymer and cosolvent, inorganic and organic incorporation and surface modification are demonstrated in detail. It is crucial to have a matched selective layer for nanofiber layers acting as a supporting layer. The various selective layers fabricated on the nanofiber layer are put forward in this paper. The fabrication approaches include inorganic deposition, polymer coating, and interfacial polymerization. Lastly, future perspectives and the main challenges in the field concerning the use of ENMs for water treatment are discussed. It is expected that the progress of ENMs will promote the prosperity and utilization of various industries such as water treatment, environmental protection, healthcare, and energy storage.
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Lee SY, Huh TH, Jeong HR, Kwark YJ. In situ fabrication of silver/polyimide composite films with enhanced heat dissipation. RSC Adv 2021; 11:26546-26553. [PMID: 35480005 PMCID: PMC9037336 DOI: 10.1039/d1ra02380b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/16/2021] [Indexed: 12/15/2022] Open
Abstract
In this study, silver/polyimide (Ag/PI) composite films with enhanced heat dissipation properties were prepared. Ag was formed in situ by reducing AgNO3 at various locations according to the reduction method. Two different types of soluble PIs capable of solution processing were used, namely Matrimid and hydroxy polyimide (HPI). Unlike Matrimid with bulky substituents, HPI with polar hydroxy groups formed ion-dipole interactions with Ag ions to form Ag particles with uniform size distribution. The location and distribution of Ag particles affect the heat emission characteristics of the composite films, resulting in better heat dissipation properties with the thermally and photochemically reduced Ag/HPI films having more Ag particles distributed inside of the films than the chemically reduced films.
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Affiliation(s)
- So Yoon Lee
- Department of Information Communication, Materials Engineering, Chemistry Convergence Technology, Soongsil University Seoul 06978 Republic of Korea
| | - Tae-Hwan Huh
- Department of Organic Materials and Fiber Engineering, Soongsil University Seoul 06978 Republic of Korea
| | - Hye Rim Jeong
- Department of Organic Materials and Fiber Engineering, Soongsil University Seoul 06978 Republic of Korea
| | - Young-Je Kwark
- Department of Organic Materials and Fiber Engineering, Soongsil University Seoul 06978 Republic of Korea
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Yeon C, Yun SJ, Yang J, Youn DH, Lim JW. Na-Cation-Assisted Exfoliation of MX 2 (M = Mo, W; X = S, Se) Nanosheets in an Aqueous Medium with the Aid of a Polymeric Surfactant for Flexible Polymer-Nanocomposite Memory Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:1702747. [PMID: 29171691 DOI: 10.1002/smll.201702747] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/18/2017] [Indexed: 06/07/2023]
Abstract
2D nanosheets of transition metal dichalcogenides (TMDCs) have been attracting attention due to their sizable band gap. Facile and effective Na-cation-assisted exfoliation of TMDC (MX2 , M = Mo, W; X = S, Se) nanosheets in an aqueous medium and their application as a composite filler in a polyvinyl alcohol (PVA) matrix are explored in this work. The presence of Na cations is highly beneficial for exfoliating defect-free and few-layer MX2 nanosheets in water in the presence of small-sized micelles of polymeric surfactant, and significantly elevates the exfoliation yield by more than one order of magnitude compared to a conventional surfactant-assisted exfoliation. The strategy suggested in this work is very advantageous compared to both Li cation intercalation in organic solvents and conventional low-yield surfactant-assisted exfoliations. As an application of the exfoliated nanosheets, the fabrication of memory devices with the configuration of Ga-doped ZnO/MX2 -PVA/Ag is demonstrated, and they exhibit bistable and write-once-read-many-times resistive switching behavior with a high ON/OFF current ratio of 3 × 103 at -1.0 V (for WS2 ) and 2.0 V (for MoS2 ). Furthermore, MX2 -PVA nanocomposite fibrous films and mats are successfully fabricated using an electrospinning technique, which can expand the use of TMDC nanofillers in applications involving highly flexible polymer-based MX2 composites.
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Affiliation(s)
- Changbong Yeon
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
- Department of Advanced Device Engineering, University of Science and Technology, 217 Gajeongno, Yuseong-gu, Daejeon, 305-350, South Korea
| | - Sun Jin Yun
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
- Department of Advanced Device Engineering, University of Science and Technology, 217 Gajeongno, Yuseong-gu, Daejeon, 305-350, South Korea
| | - Junjae Yang
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
- Department of Advanced Device Engineering, University of Science and Technology, 217 Gajeongno, Yuseong-gu, Daejeon, 305-350, South Korea
| | - Doo-Hyeb Youn
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
| | - Jung Wook Lim
- ICT Materials and Components and Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeongno, Yuseong-gu, Daejeon, 305-700, South Korea
- Department of Advanced Device Engineering, University of Science and Technology, 217 Gajeongno, Yuseong-gu, Daejeon, 305-350, South Korea
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Mandal P, Ghosh S. Green synthesis of poly(vinyl alcohol)–silver nanoparticles hybrid using Palash (Butea monosperma) flower extract and investigation of antibacterial activity. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2137-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shang M, Hou H, Gao F, Wang L, Yang W. Mesoporous Ag@TiO2 nanofibers and their photocatalytic activity for hydrogen evolution. RSC Adv 2017. [DOI: 10.1039/c7ra03177g] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We reported the exploration of Ag@TiO2 mesoporous nanofibers with significantly improved photocatalytic performance.
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Affiliation(s)
- Minghui Shang
- Institute of Materials
- Ningbo University of Technology
- Ningbo City
- P. R. China
| | - Huilin Hou
- Institute of Materials
- Ningbo University of Technology
- Ningbo City
- P. R. China
| | - Fengmei Gao
- Institute of Materials
- Ningbo University of Technology
- Ningbo City
- P. R. China
| | - Lin Wang
- Institute of Materials
- Ningbo University of Technology
- Ningbo City
- P. R. China
| | - Weiyou Yang
- Institute of Materials
- Ningbo University of Technology
- Ningbo City
- P. R. China
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Subjalearndee N, Intasanta V. Mechanically robust, multifunctional and nanofibrous membranes for tuberculosis elimination. RSC Adv 2017. [DOI: 10.1039/c7ra08762d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Mechanically robust and potent antibacterial membranes are fabricated for total elimination of water- and airborne tuberculosis (TB) bacteria.
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Affiliation(s)
- Nakarin Subjalearndee
- Nano Functional Textile Laboratory
- National Nanotechnology Center
- National Science and Technology Development Agency
- Pathumthani
- Thailand
| | - Varol Intasanta
- Nano Functional Textile Laboratory
- National Nanotechnology Center
- National Science and Technology Development Agency
- Pathumthani
- Thailand
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