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Effect of Polyethylene glycol (PEG) additive on the structure and performance of forward osmosis membrane based on polysulfone substrate
Authors: LIU Renxiao, CHEN Gang, WANG Yanqiang, LI Xuemei, HE Tao
Units: 1. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China 2.University of Chinese Academy of Sciences, Beijing 100049, China 3. The Walt Disney (China) Co., Ltd. Disney Research China, Shanghai 200031, China
KeyWords: forward osmosis; polysulfone; interfacial polymerization; structural parameter; internal concentration polarization
year,volume(issue):pagination: 2017,37(1):36-43

 Effects of PEG400 concentration in the polysulfone (PSF) dope solution on the substrate morphology and performance of the thin-film composite (TFC) forward osmosis (FO) membranes were investigated. Thermodynamic and kinetic analysis showed that the phase inversion was faster at higher PEG400 concentration. The contact angle and porosity of the PSF substrate at various PEG400 concentrations were similar, but the reverse osmosis (RO) water permeability of the TFC FO membrane increased as the PEG400 increased. The structure parameter (S) decreased to 516 μm at PEG400 concentration of 8wt%, and then increased. The TFC FO membrane showed the highest FO water flux (Jv) at 8wt% PEG400 in both AL-FS mode (12.5 L/m2h) and AL-DS mode (23.8 L/m2h). This means that PSF-8 has the lowest internal concentration polarization (ICP). 

国家自然科学基金资助项目(21507142,21176119,U150711), 迪士尼中国研究基金

第一作者简介: 刘仁啸(1990- ),男,山东青岛人,硕士生,主要研究正渗透膜分离技术,E-mail:seanmiller123@163.com * 通讯作者,E-mail: het@sari.ac.cn

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