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Wang Z, Wang X, Zheng T, Mo B, Xu H, Huang Y, Wang J, Gao C, Gao X. High Flux Nanofiltration Membranes with Double-Walled Carbon Nanotube (DWCNT) as the Interlayer. MEMBRANES 2022; 12:1011. [PMID: 36295770 PMCID: PMC9609115 DOI: 10.3390/membranes12101011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/06/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Nanofiltration (NF) membranes with a high permeability and rejection are of great interest in desalination, separation and purification. However, how to improve the permeation and separation performance still poses a great challenge in the preparation of NF membranes. Herein, the novel composite NF membrane was prepared through the interfacial polymerization of M-phenylenediamine (MPD) and trimesoyl chloride (TMC) on a double-walled carbon nanotube (DWCNT) interlayer supported by PES substrate. The DWCNT interlayer had a great impact on the polyamide layer formation. With the increase of the DWCNT dosage, the XPS results revealed an increase in the number of carboxyl groups, which decreased the crosslinking degree of the polyamide layer. Additionally, the AFM results showed that the surface roughness and specific surface area increased gradually. The water flux of the prepared membrane increased from 25.4 L/(m2·h) and 26.6 L/(m2·h) to 109 L/(m2·h) and 104.3 L/(m2·h) with 2000 ppm Na2SO4 and NaCl solution, respectively, under 0.5 MPa. Meanwhile, the rejection of Na2SO4 and NaCl decreased from 99.88% and 99.38% to 96.48% and 60.47%. The proposed method provides a novel insight into the rational design of the multifunctional interlayer, which shows great potential in the preparation of high-performance membranes.
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Affiliation(s)
- Zhen Wang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xiaojuan Wang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Tao Zheng
- SEPCOIII Electric Power Construction Co., Ltd., Qingdao 266100, China
| | - Bing Mo
- SEPCOIII Electric Power Construction Co., Ltd., Qingdao 266100, China
| | - Huacheng Xu
- Quanzhou Lanshen Environmental Protection Research Institute Co., Ltd., Quanzhou 362000, China
| | - Yijun Huang
- Quanzhou Lanshen Environmental Protection Research Institute Co., Ltd., Quanzhou 362000, China
| | - Jian Wang
- The Institute of Seawater Desalination and Multipurpose Utilization, SOA, Tianjin 300192, China
| | - Congjie Gao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xueli Gao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
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Peydayesh M. Nanofiltration Membranes: Recent Advances and Environmental Applications. MEMBRANES 2022; 12:membranes12050518. [PMID: 35629844 PMCID: PMC9146730 DOI: 10.3390/membranes12050518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/09/2022] [Accepted: 05/11/2022] [Indexed: 11/24/2022]
Affiliation(s)
- Mohammad Peydayesh
- Department of Health Sciences and Technology, ETH Zurich, 8092 Zurich, Switzerland
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