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Preparation of thermo-responsive polysulfone membranes with satisfactory performance via blending modification method

Authors： ZENG Chongyang, XIE Rui, JU Xiaojie, WANG Wei, LIU Zhuang, CHU Liangyin

Units： School of Chemical Engineering, Sichuan University, Chengdu 610065

KeyWords： Blending modification; Vapor-induced phase separation; Thermo-responsive; Polysulfone membrane; Poly(N-isopropylacrylamide

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2020,40(6):14-21

Abstract：

Thermo-responsive polysulfone membranes with satisfactory performance were successfully prepared by efficient regulating microstructure of PSf membranes and the distribution of poly(N-isopropylacrylamide) (PNIPAM) microgels, which simultaneously act as pore-forming additives and thermo-sensitive gates, via blending modification and vapor-induced phase separation (VIPS) method. The effect of the exposure time during the VIPS process (tv) on the microstructure, chemical composition, wettability, trans-membrane water flux and thermo-responsive characteristics of thermo-responsive polysulfone membranes were investigated by means of Scanning Electron Microscope, Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy, Contact Angle and water flux tests. The results showed that with the increase of tv, the surface of thermo-responsive polysulfone membranes changed from dense to porous, and cross-sectional structures changed from finger-like structures to bi-continuous structures. The trans-membrane water fluxes at both low and high temperatures increased gradually, while the thermo-responsive properties increased first and then decreased. The thermo-responsive polysulfone membrane prepared by the tv of 20 s possessed the optimized thermo-responsive characteristics. The normalized thermo-responsive gating coefficient (N) was as high as 18.64.6, and the water flux at 39 ºC was 25443 L/(m2·h·MPa), which had satisfactory stability and repeatability.

Funds：

四川省杰出青年科技人才项目（2019JDJQ0026）

AuthorIntro：

曾崇阳（1994-），女，四川成都人，硕士研究生，智能膜材料与膜过程，E-mail: 2017223070062@stu.scu.edu.cn

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