基于单宁酸的中空纤维纳滤膜抗污染改性  

Anti-fouling modification of hollow fiber nanofiltration membrane based on tannic acid

作　　者：张慧莹 吕晓龙[1,2] 任凯 谷杰 王晨宇 李文远 鲁艺文 ZHANG Huiying;LYU Xiaolong;REN Kai;GU Jie;WANG Chenyu;LI Wenyuan;LU Yiwen(State Key Laboratory of Separation Membrane and Membrane Process,School of Materials Science and Engineering,Institute of Biochemical Engineering,Tiangong University,300387,China;State Key Laboratory of Membrane Materials and Membrane Applications,Tianjin Motimo)

机构地区：[1]省部共建分离膜与膜过程国家重点实验室,天津工业大学材料科学与工程学院,生物化工研究所,天津300387 [2]膜材料与膜应用国家重点实验室,天津膜天膜科技股份有限公司,天津300457

出　　处：《膜科学与技术》2024年第4期58-64,共7页Membrane Science and Technology

基　　金：国家重点研发计划项目(2023YFB3810500)。

摘　　要：针对纳滤膜污染问题,采用富含酚羟基的单宁酸对聚酰胺纳滤膜表面进行接枝改性,构建富含酚羟基的抗污染层。探究单宁酸浓度对接枝效果的影响,利用傅里叶变换红外光谱仪、Zeta电位以及水接触角测定仪等手段对改性膜进行表征.结果表明,当单宁酸质量分数为0.15%时,改性膜通量衰减率最低,为5.05%,且稳态膜通量最高,为97.8 L/(m^(2)·h·MPa);在简单的去离子水清洗后通量恢复率达到98.1%;相比于常规纳滤原膜,通量衰减率降低了84.6%,稳态通量提升了48.9%,通量恢复率提升了11.8%,展现出优良的抗污染性能.Aiming at the problem of nanofiltration membrane fouling,tannic acid rich in phenolic hydroxyl groups was used to graft modify the surface of polyamide nanofiltration membrane to construct an anti-fouling layer rich in phenolic hydroxyl groups.The effect of tannic acid concentration on the grafting effect were investigated.The modified membranes were characterized by Fourier transform infrared spectrometer,Zeta potential and water contact angle tester.The results showed that when the concentration of tannic acid was 0.15%,the flux decay rate was the lowest,which was 5.05%,and the steady-state membrane flux was the highest,which was 97.8 L/(m^(2)·h·MPa).The flux recovery rate reached 98.1%after simple deionized water cleaning.Compared with the conventional nanofiltration membrane,the flux decay rate was reduced by 84.6%,the steady-state flux was increased by 48.9%,and the flux recovery rate was increased by 11.8%,showing excellent anti-pollution performance.

关 键 词：中空纤维 表面接枝 单宁酸 腐殖酸 抗污染 

分 类 号：TQ051.893[化学工程]