Center for Membrane and Film Technology, Department of Chemical Science and Engineering , Kobe University , Kobe 657-8501 , Japan.
Department of Chemistry , King Fahad University of Petroleum and Minerals , Dhahran 31261 , Kingdom of Saudi Arabia.
ACS Appl Mater Interfaces. 2018 Dec 26;10(51):44880-44889. doi: 10.1021/acsami.8b17192. Epub 2018 Dec 11.
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 h bar), 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.
处理许多工业和人类社会排放的乳化含油废水的具有成本效益的方法是一项巨大的挑战。在此，基于具有良好膜形成能力和固有中间亲水性的脂肪族聚酮（PK）聚合物，通过相分离和随后的快速表面还原，简便地制备了一种新的还原 PK（rPK）膜，这种膜具有包含酮基和羟基的全亲水性和电中性表面化学以及具有再进入结构的原纤状形态。表面化学和表面几何形状的协同合作赋予了所制备的膜具有优异的超亲水性、水下超疏油性和超亲油性以及抗蛋白质附着性。因此，具有挑战性的含油乳液（含粘性油、表面活性剂、高盐度和蛋白质）的抗污染和自清洁过滤可以轻松实现，通量高达约 50000 L m h bar，通量下降缓慢且可逆，并且油渗透物低（<20 ppm）。相比之下，由于其表面性能不理想，由混合纤维素酯制成的商业超亲水微孔膜在进行乳液过滤时会逐渐或立即受到严重的污染。人们相信，这种具有理想超润湿性、高通量和制备简单性的膜类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。
