摘要
本研究针对乳化含油废水处理中膜污染问题,创新性地开发了具有协同抗污结构的PVDF复合膜。通过蒸汽诱导相分离(VIPS)技术制备PVDF基膜,结合聚乙烯基吡咯烷酮-聚乙烯基三乙氧基硅烷(PVP-VTES)共聚物亲水改性与逐步界面聚合工艺,在膜表面形成“PVP层-聚酰胺(PA)层”双效抗污层。实验数据显示,改性膜在13 h连续运行中保持油相回收率>60%(纯度99.9%),水相回收率近100%(纯度>98%)。机理分析表明,PVP层与PA层的协同效应促进油滴在膜表面的聚结脱附,有效延缓膜污染进程。该技术为乳化含油废水处理与资源回收提供了新型解决方案。
This study addresses the issue of membrane fouling in the treatment of emulsified oily wastewater by innovatively developing a PVDF composite membrane with a synergistic anti-fouling structure.The PVDF substrate membrane was prepared using the vapor-induced phase separation(VIPS)technique, followed by hydrophilic modification with a polyvinylpyrrolidone-polyvinyltriethoxysilane ( PVP VTES ) copolymer and a stepwise interfacial polymerization process to form a dual-function anti-fouling layer consisting of a “hydration layer-polyamide” structure on the membrane surface. Experimental data showed that the modified membrane maintained an oil recovery rate of over 60% (purity~99.9%) and a water recovery rate close to 100% (purity>98%) during 13 hours of continuous operation. Mechanistic analysis revealed that the synergistic effect of the polyamide (PA) layer and the hydration layer facilitated the coalescence and detachment of oil droplets from the membrane surface, effectively mitigating membrane fouling. This technology provides a novel solution for emulsified oily wastewater treatment and resource recovery.
作者
汪家伟
朱岳
丁雅杰
王建强
刘富
WANG Jiawei;ZHU Yue;DING Yajie;WANG Jianqiang;LIU Fu(School of materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China;Ningbo Institute of Materials Technology&Engineering Chinese Academy of Sciences,Ningbo 315201,China;Ningbo College of Materials Technology&Engineering University of Chinese Academy of Sciences,Ningbo 315201,China)
出处
《膜科学与技术》
北大核心
2025年第3期107-117,126,共12页
Membrane Science and Technology
基金
国家自然科学基金面上项目(52373111)。
关键词
PVDF复合膜
油-水分离
抗污染
界面聚合
蒸汽诱导相分离
亲水改性
PVDF composite membrane
oil-water separation
anti-fouling
interfacial polymerization
VIPS
hydrophilic modification
作者简介
第一作者:汪家伟(2001-),男,安徽合肥人,硕士研究生,主要从事油水分离膜制备及其性能研究.通讯作者:丁雅杰,E-mail:dingyajie@nimte.ac.cn;通讯作者:王建强,E-mail:wangjianqiang@nimte.ac.cn;通讯作者:刘富,E-mail:fu.liu@nimte.ac.cn。
