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
张慧莹 1吕晓龙 1任凯 1谷杰 2王晨宇 1李文远 2鲁艺文1
作者信息
- 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;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
- 2. 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
- 折叠
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/(m2·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.
Abstract
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/(m2·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Key words
hollow fiber/surface grafting/tannic acid/humic acid/anti-pollution引用本文复制引用
基金项目
国家重点研发计划项目(2023YFB3810500)
出版年
2024
NETL
NSTL
万方数据