Yang Jinzhu, Sun Wei, Ju Junping, Tan Yeqiang, Yuan Hua
Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center of Marine Biobased Fiber and Ecological Textile Technology, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
Polymers (Basel). 2023 Jan 9;15(2):327. doi: 10.3390/polym15020327.
A novel superhydrophilic and underwater superoleophobic modified PVDF membrane for oil/water separation was fabricated through a modified blending approach. Pluronic F127 and amphiphilic copolymer P (MMA-AA) were directly blended with PVDF as a hydrophilic polymeric additive to prepare membranes via phase inversion induced by immersion precipitation. Then, the as-prepared microfiltration membranes were annealed at 160 °C for a short time and quenched to room temperature. The resultant membranes exhibited contact angles of hexane larger than 150° no matter whether in an acidic or basic environment. For 1, 2-dichloroethane droplets, the membrane surface showed a change from superoleophilic to superoleophobic under water with aqueous solutions with pH values from 2 to 13. This as-prepared membrane has good mechanical strength and can then be applied for oil and water mixture separation.
通过一种改进的共混方法制备了一种用于油水分离的新型超亲水和水下超疏油改性聚偏氟乙烯（PVDF）膜。将普朗尼克F127和两亲共聚物P（MMA - AA）作为亲水性聚合物添加剂直接与PVDF共混，通过浸没沉淀诱导的相转化制备膜。然后，将制备好的微滤膜在160℃下短时间退火并淬火至室温。无论在酸性还是碱性环境中，所得膜对己烷的接触角均大于150°。对于1,2 - 二氯乙烷液滴，在pH值为2至13的水溶液中，膜表面在水下呈现出从超亲油到超疏油的变化。这种制备好的膜具有良好的机械强度，可用于油水混合物的分离。
