NDLI: Zwitterionic Polysulfone Copolymer/Polysulfone Blended Ultrafiltration Membranes with Excellent Thermostability and Antifouling Properties

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Zwitterionic Polysulfone Copolymer/Polysulfone Blended Ultrafiltration Membranes with Excellent Thermostability and Antifouling Properties

Content Provider	MDPI
Author	Li, Dalong Gao, Changlu Wang, Xinyue Wu, Gang Yin, Jinghua Huang, Yudong Sun, Xiuhua
Copyright Year	2021
Description	Membrane fouling has been one of the most important challenges in membrane separation operations. In this study, we report a facile strategy to prepare antifouling polysulfone (PSf) UF membranes by blending amphiphilic zwitterion polysulfone-co-sulfobetaine polysulfone (PSf-co-SBPSf) copolymer. The copolymer chemical structure was characterized by$ ^{1}$HNMR spectroscopy. The PSf/PSf-co-SBPSf blend membranes with various zwitterionic SBPSf segment contents exhibited better surface hydrophilicity and excellent antifouling ability compared to PSf and PSf/PEG membranes. The significant increase of both porosity and water permeance indicates that the PSf-co-SBPSf has a pore-forming effect. The pure water flux and flux recovery ratio of the PSf/PSf-co-SBPSf blend membranes were both remarked to improve 286.43 $L/m^{2}$h and 92.26%, while bovine serum albumin (BSA) rejection remained at a high level (97.66%). More importantly, the water flux and BSA rejection see minimal variance after heat treatment, indicating excellent thermostability. Overall, the PSf/PSf-co-SBPSf blend membranes achieved a comprehensive performance of sustainable hydrophilic, high permeation flux, and remarkable antifouling ability, thus becoming a promising candidate in high-temperature separation application.
Starting Page	932
e-ISSN	20770375
DOI	10.3390/membranes11120932
Journal	Membranes
Issue Number	12
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-11-26
Access Restriction	Open
Subject Keyword	Membranes Environmental Engineering Environmental Sciences Sulfobetaine Polysulfone Zwitterions Antifouling Thermostability
Content Type	Text
Resource Type	Article

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