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Preparation of GO/ZIF-8 modified PVDF hollow fiber membranes and investigation of antifouling performance
Authors： LIU Zihao1, WANG Haitao1, CHANG Na2, LIU Peng3, 
GENG Huibin4, LIU Enbin1, XU Yinong3, 
LI Zhonghua3, CHEN Donggen3
Units： 1. School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China;
 2. School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China;
 3. Zhejiang Jinmo Environmental Technology Co., Ltd., Shaoxing 312000, China;
 4. School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
KeyWords： PVDF hollow fiber membrane; ultrafiltration; graphene oxide; ZIF-8; antifouling performance

 
ClassificationCode：TQ028.8
year,volume(issue):pagination： 2026, 46(3):180-192

Abstract：

Polyvinylidene fluoride (PVDF) hollow-fiber membranes are widely used in the field of water treatment, but it is prone to membrane fouling in the actual operation process, which restricts its long-term stable operation. The current research shows that the membrane modified by graphene oxide (GO) nanomaterials has excellent anti-fouling performance, but there will be problems such as membrane flux decline and structural instability. In this study, PVDF-GO / ZIF-8 composite membrane was successfully prepared by using polydopamine (PDA) as the covalent grafting medium, grafting GO as the modified layer, and GO oxygen-containing groups as the coordination sites to promote the in-situ growth of ZIF-8, and the membrane filtration performance and stability were improved. The experimental results showed that GO grafting significantly enhanced the hydrophilicity and electronegativity of the membrane. Using bovine serum albumin (BSA) as the model pollutant, the water flux recovery rate of the GO membrane increased from 57.01% to 79.65%, and the antifouling performance was enhanced. After the introduction of ZIF-8, the pure water flux increased from 334.35 L/（m2·h）of GO membrane to 558.65 L/（m2·h）.At the same time, the composite membrane still maintained the high-throughput recovery rate in the pollution cycle filtration experiment, and showed better compression resistance and operational stability, which provided the new idea for the preparation of high-performance separation membrane for water treatment. 

Funds：

国家重点研发计划项目（2023YFE0101000）；山东省重点研发计划项目（2022CXGC020416）资助

AuthorIntro：
第一作者简介： 刘子豪（2002-），男，河北邯郸人，硕士研究生，研究方向为PVDF中空纤维膜的改性及其抗污染研究.*通讯作者，李忠华，E-mail:2245959664@qq.com；陈董根，E-mail:chendg@jinmo.com.cn

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