Reductant-assisted polydopamine-modified membranes for efficient water purification  

作　　者：Feng Sun Jinren Lu Yuhong Wang Jie Xiong Congjie Gao Jia Xu 

机构地区：[1]Key Laboratory of Marine Chemistry Theory and Technology(Ministry of Education),School of Materials Science and Engineering,College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China [2]National Center of Ocean Standards and Metrology,Tianjin 300112,China

出　　处：《Frontiers of Chemical Science and Engineering》2021年第1期109-117,共9页化学科学与工程前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.21878279);Fundamental Research funds for the Central Universities(No.201841012);Natural science fund of Shandong Province Project(No.ZR2018MB032)。

摘　　要：Surface engineering with polydopamine coatings has been considered a promising surface functionalisation tool.However,it is difficult to control the self-polymerisation for polydopamine formation,which usually causes severe interparticle aggregation.In this study,polydopamine self-polymerisation was controlled by adjusting its reducing environment using a reductant(NaBH4)to fabricate mixed cellulose ester(MCE)/polydopamine membranes.An oxidising environment using NaIO4 was additionally tested as the control.The results showed that a thin polydopamine coating with small polydopamine particles was formed on the skeleton frameworks of the MCE membrane with NaBH4,and the self-polymerisation rate was suppressed.The polydopamine coating formed in the reducing environment facilitated excellent water transport performance with a water permeance of approximately 400 L·m^(−2)·h^(−1)·bar^(−1) as well as efficient organic foulant removal with a bovine serum albumin rejection of approximately 90%.In addition,the polydopamine coating with NaBH4 exhibited both excellent chemical stability and anti-microbial activity,demonstrating the contribution of the reducing environment to the performance of the MCE/polydopamine membranes.It shows significant potential for use in water purification.

关 键 词：MEMBRANE water purification POLYDOPAMINE reducing environment self-polymerization control 

分 类 号：TU991.2[建筑科学—市政工程]