摘要
使用膜分离处理含油废水过程中,膜表面油污残留是制约应用的关键问题.对基膜表面进行亲水改性是提高分离效率与减少油污吸附的有效方法.本研究利用二苯甲酮光交联反应的特性,在基膜表面共价交联了含有2-甲基丙烯酰氧乙基磷酸胆碱(MPC)的两性离子聚合物,在大幅度提高了膜表面的亲水性的同时确保了亲水层的稳定性.油水分离膜呈现超亲水的性质,纯水通量可提高至4.7×10^(4)L/(m^(2)·h),通量恢复率从90.0%提升至99.8%.由于在基膜与两性离子聚合物间构建了稳定的共价键,膜表面的亲水性在强酸与强碱的清洗后依然能够保持,该研究为稳定的油水分离膜表面亲水改性提供了新策略.
In the process of treating oil wastewater with membrane separation,the oil fouling is the key problem restrict the application.The hydrophilic modification of the membrane surface is an effective strategy to improve the separation efficiency and reduce the oil adsorption.In this study,a copolymer containing 2-methacryloyloxymethylmethyroside(MPC)was covalently crosslinked to the membrane surface using the characteristics of benzophenone photo crosslinking reaction,which greatly improves the surface hydrophilicity of the membrane and ensure the stability of the hydrophilic layer.The modified membrane showed superhydrophilic properties,the pure water flux could be increased to 4.7×10^(4)L/(m^(2)·h),and the flux recovery rate was increased from 90.0%to 99.8%.At the same time,due to the stable covalent grafting between the membrane material and the zwitterionic polymer,the hydrophilicity of the membrane surface was maintained after cleaning with strong acids and bases.This work may provide a new strategy for the stable hydrophilic modification of membrane surfaces.
作者
陈聪
杨紫云
赵博远
刘巧鸿
叶青
安全福
CHEN Cong;YANG Ziyun;ZHAO Boyuan;LIU Qiaohong;YE Qing;An Quanfu(Beijing University of Technology,Facility of Environmental and Life Science,Beijing 100124,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2022年第6期101-109,共9页
Membrane Science and Technology
基金
省部共建分离膜与膜过程国家重点实验室(天津工业大学)开放课题(M202106)。
关键词
油水分离
超亲水
两性离子聚合物
二苯甲酮
共价交联
oil water separation
superhydrophilic
zwitterionic polymer
benzophenone
covalent cross-linking
