膜科学与技术

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Fabrication of hollow fiber loose nanofiltration separation layer based on nucleophilic addition reaction and its dye desalination performance

Authors： YANG Yi，LI Jianxin, CUI Zhenyu

Units： School of Material Science and Engineering, Tiangong University, Tianjin 300387，China

KeyWords： hollow fiber membrane；loose nanofiltration；chitosan；chemical cross-linking；dye retention

ClassificationCode：TQ028，TB34

year,volume(issue):pagination： 2023,43(2):1-9

Abstract：

In this work, the hollow fiber loose nanofiltration (LNF) separation layer was fabricated by chemical cross-linking using chitosan (CS) as the cross-linker and polyvinylidene fluoride (PVDF)/styrene-maleic anhydride (SMA) hollow fiber ultrafiltration membrane as the substrate membrane. The effects of CS concentration on the structure, surface properties of the membrane separation layer and dye desalination performance were investigated with emphasis. The results showed that the nucleophilic addition reaction between CS and SMA successfully constructed the stable and compact LNF separation layer on the outer surface of the hollow fiber membrane. Meanwhile, the hydrophilicity of the membrane was significantly increased due to the large amount of hydroxyl groups (-OH) carried by the CS molecular chain. When the mass fraction of CS was 3%, the membrane showed high rejection of amaranth red (99.8%) while maintaining a high flux (65.8L/m2•h).In addition, the membrane exhibited excellent dye retention performance and long-term stability.

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AuthorIntro：

杨毅（1997-），男，河南洛阳人，硕士生，主要从事膜材料制备及应用研究，E-mail：850223220@qq.com

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