Hierarchical metal-phenolic-polyplex assembly toward superwetting membrane for high-flux and antifouling oil-water separation  

作　　者：Xueting Zhao Yuanyuan Jiang Lijuan Cheng Youyou Lan Tingyuan Wang Jiefeng Pan Lifen Liu 

机构地区：[1]College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China

出　　处：《Chinese Chemical Letters》2022年第8期3859-3864,共6页中国化学快报（英文版）

基　　金：financially supported by National Natural Science Foundation of China(No.21706230);China Postdoctoral Science Foundation(No.2019M652141);National Natural Science Foundation of China(Nos.22075246 and 21776253);Public Welfare Project of the Science and Technology Committee of Zhejiang Province(No.LGF20B060002);Provincial Key R&D Program of Zhejiang Province(No.2019C03094)。

摘　　要：Superwetting membranes have emerged as promising materials for the efficient treatment of oily wastewater.Typically,superwetting membranes can be developed by ingeniously chemical modification and topographical structuration of microporous membranes.Herein,we report the hierarchical assembly of metal-phenolic-polyplex coating to manipulate membrane surface superwettability by integrating metal-phenolic(Fe^(Ⅲ)-tannic acid(TA))assembly with polyplex(tannic acid-polyethylenimine(PEI))assembly.The proposed Fe-TA-PEI coating can be deposited on microporous membrane via simply dipping into Fe^(Ⅲ)-TA-PEI co-assembly solution.Based on the catechol chemistry,the coordination complexation of Fe^(Ⅲ)and TA develops metal-phenolic networks to provide hydrophilic chemistries,and the electrostatic complexation of TA and PEI generates nanoconjugates to impart hierarchical architectures.Benefiting from the synergy of hydrophilic chemistries and hierarchical architectures,the resulting PVDF/Fe-TA-PEI membrane exhibits excellent superhydrophilicity(~0°)underwater superoleophobicity(~150°)and superior anti-oil-adhesion capability.The superhydrophilicity of PVDF/Fe-TA-PEI membrane greatly promotes membrane permeability,featuring water fluxes up to 5860 L m^(-2)h^(-1).The underwater superoleophobicity of PVDF/Fe-TA-PEI membrane promises potential flux(3393 L m^(-2)h^(-1)),high separation efficiency(99.3%)and desirable antifouling capability for oil-in-water emulsion separation.Thus,we highlight the reported hierarchical metal-phenolic-polyplex assembly as a straightforward and effective strategy that enables the synchronous modulation of surface chemistry and topography toward superwetting membranes for promising high-flux and antifouling oil-water separation.

关 键 词：Metal-phenolic POLYPLEX Superwetting MEMBRANE Oil-water separation 

分 类 号：TQ028.8[化学工程] X74[环境科学与工程—环境工程]