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Comparative study of the performance of thin-film composite forward osmosis membranes based on polyethersulfone-based membranes from different manufacturers

Authors： XU Subo, ZHAO Pin, LIU Hao, SONG Weilong, WANG Xinhua

Units： 1. School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122，China;2. Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Wuxi 214122，China;3 Jiangsu Cooperative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009，China

KeyWords： thin film composite (TFC) membrane; substrate; interfacial polymerization; draining time; forward osmosis

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2024,44(2):72-79

Abstract：

Thin film composite (TFC) membranes, which consist of a porous substrate and a polyamide layer generated by interfacial polymerization (IP) reaction, have been widely used in the fields of nanofiltration, reverse osmosis and forward osmosis (FO). Recently, the influence of substrate properties on the performance of TFC membranes has received increasing attention. Our early study found that even under the conditions of identical preparation methods and nominal pore sizes of the substrate membranes, there were significant differences in the TFC membranes prepared from substrate membranes produced by different manufacturers. In this paper, commercial polyethersulfone (PES) membranes with nominal pore size of 0.22 μm from two companies were selected as the substrate, and the different properties of the two substrate membranes and their effects on the performance of TFC membranes were comparatively studied by adjusting the draining time of the aqueous phase in the IP process. The results showed that the substrate membrane with stronger hydrophilicity, denser and more uniform distribution of membrane pore locations, and more homogeneous pore size had higher water flux and lower reverse salt flux. In addition, the water flux of TFC FO membranes based on both substrate membranes showed a decreasing trend with the elongation of the draining time, while the reverse salt flux always remained low. In conclusion, this study provides a reference for the standardized preparation of TFC membranes in the future.

Funds：

国家自然科学基金青年项目（52100089）

AuthorIntro：

许素博（2000-），男，山东菏泽人，硕士生，主要从事膜法水处理技术研究，E-mail：xu17159877560@163.com

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