摘要 : Current hydrophilic modification strategies improve the antifouling ability ofmembranes but fail to completely eliminate the fouling of emulsified oildroplets with a wide size distribution. Constructing membranes with superioranti... 展开 Current hydrophilic modification strategies improve the antifouling ability ofmembranes but fail to completely eliminate the fouling of emulsified oildroplets with a wide size distribution. Constructing membranes with superioranti-oil-fouling ability to resist various oil droplets especially at highpermeation fluxes is challenging. Here, the fabrication of a zero-oil-foulingmembrane by grafting considerably high coverage of zwitterionic polymer andbuilding defect-free hydration defense barrier on the surface is reported. Auniform layer of protocatechuic acid with –COOH as abundant as existing inevery molecule is stably deposited on the membrane so as to providesufficient reactive sites and achieve dense grafting of the zwitterionic polymer.The coverage of zwitterionic polymer on the membrane plays a crucial role inpromoting the antifouling ability to emulsified oil droplets. Thepoly(vinylidene fluoride) membrane with 93% coverage of the zwitterionicpolymer exhibits zero oil fouling when separating multitudinous oil-in-wateremulsions with ≈0% flux decline, ≈100% flux recovery, and a high water fluxof ≈800 L m~(−2) h~(−1) bar~(−1). This membrane outperforms almost all of thereported membranes in terms of the comprehensive antifouling performance.This work provides a feasible route for manufacturing super-antifoulingmembranes toward oil/water separation application. 收起