Xiang Xin, Chen DongYun, Li NaJun, Xu QingFeng, Li Hua, He JingHui, Lu JianMei
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 China.
Sci China Technol Sci. 2023;66(5):1461-1470. doi: 10.1007/s11431-022-2325-2. Epub 2023 Apr 19.
Although many superwetting materials have been designed for the treatment of oil-containing wastewater, separation strategies for oil-in-water systems containing bacteria have rarely been reported. Herein, poly(vinylidene difluoride)- and poly(lactic acid)-blended fibrous membranes loaded with silver and copper oxide nanoparticles were successfully prepared by a two-step method of electrostatic spinning and liquid-phase synthesis. The product membrane showed excellent super-oleophilic properties in air and hydrophobicity under oil. It could separate water-in-oil emulsion systems containing surfactants with an efficiency above 90%. More importantly, the nanoparticle-loaded fibers were characterized by material degradability and slowly released ions. The fibers exhibited excellent antibacterial activities against both gram-positive and -negative bacteria. This work provides a feasible strategy for water-in-oil emulsion separation and bacterial treatment of wastewater.
尽管已经设计了许多超润湿性材料用于处理含油废水，但针对含有细菌的水包油体系的分离策略却鲜有报道。在此，通过静电纺丝和液相合成两步法成功制备了负载氧化银和氧化铜纳米颗粒的聚偏氟乙烯和聚乳酸共混纤维膜。所得膜在空气中表现出优异的超亲油性，在油下表现出疏水性。它能够分离含有表面活性剂的油包水乳液体系，分离效率高于90%。更重要的是，负载纳米颗粒的纤维具有材料可降解性和离子缓慢释放的特性。这些纤维对革兰氏阳性菌和阴性菌均表现出优异的抗菌活性。这项工作为油包水乳液分离和废水细菌处理提供了一种可行的策略。
