The cost-effective treatment of emulsified oily wastewater discharged by many industries and human societies is a great challenge. Herein, based on an aliphatic polyketone (PK) polymer with a good membrane formation ability and an intrinsic intermediate hydrophilicity, a new class of reduced PK (rPK) membranes combining an all hydrophilic and electrically neutral surface chemistry comprising ketone and hydroxyl groups, and a fibril-like morphology featuring re-entrant structure, was facilely prepared by phase separation and following fast surface reduction. The synergetic cooperation of surface chemistry and surface geometry endowed the prepared membranes with excellent superhydrophilicity, underwater superoleophobicity, and underoil superhydrophilicity, in addition to antiprotein-adhesion property. Thus, fouling-resistant and self-cleaning filtrations of challenging oil-in-water emulsions containing adhesive oil, surfactant, high salinity, and proteins were effortlessly realized with high flux (up to ∼50 000 L m^–2 h^–1 bar^–1), slow and reversible flux decline, and low oil permeate (<20 ppm). In contrast, a commercial superhydrophilic microporous membrane made of mixed cellulose ester suffered severe fouling gradually or immediately when carrying out the emulsion filtrations due to its less than ideal surface properties. It is believed that this class of membranes with desirable superwettability, high flux, and preparation simplicity can be a potential new benchmark for high performance and large-scale oil–water separation in complex environments.

中文翻译：

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防污和自清洁的脂肪族聚酮膜，用于油水乳液的可持续分离

许多行业和人类社会排放的乳化含油废水的经济有效处理是一个巨大的挑战。本文中，基于具有良好的膜形成能力和固有的中间亲水性的脂族聚酮（PK）聚合物，新型的还原的PK（rPK）膜结合了包括酮和羟基在内的所有亲水性和电中性表面化学物质，以及通过相分离和快速的表面还原可以容易地制备出具有凹状结构的原纤维状形态。表面化学和表面几何形状的协同作用使制备的膜具有出色的超亲水性，水下超疏油性和底油超亲水性，此外还具有抗蛋白质粘附特性。因此，^–2 h ^–1 bar ^–1），通量下降缓慢且可逆，并且油渗透率低（<20 ppm）。相反，由混合纤维素酯制成的商业超亲水微孔膜由于进行了乳化而不理想的表面性质，因此在进行乳液过滤时逐渐或立即严重结垢。可以相信，这类膜具有所需的超湿性，高通量和制备简便性，可以成为在复杂环境中进行高性能和大规模油水分离的潜在新基准。