Facile Fabrication of Superwetting PVDF Membrane for Highly Efficient Oil/Water Separation.
Facile Fabrication of Superwetting PVDF Membrane for Highly Efficient Oil/Water Separation.
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DOI：
10.3390/polym15020327
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发表时间：
2023-01-09
期刊：
影响因子：
5
通讯作者：
Yuan H
中科院分区：
文献类型：
--
作者：
Yang J;Sun W;Ju J;Tan Y;Yuan H
采用改性共混法制备了一种新型超亲水、水下超疏油改性PVDF油水分离膜。以聚偏氟乙烯（PVDF）为亲水性添加剂，将Pluronic F127和两亲性共聚物P（MMA-AA）直接共混，采用浸没沉淀法制备相转化膜。然后，将所制备的微滤膜在160 °C下退火短时间并骤冷至室温。无论在酸性还是碱性环境中，所得膜均表现出大于150°的己烷接触角。对于1，2-二氯乙烷液滴，在pH值为2 ~ 13的水溶液中，膜表面表现出从超亲油到超疏油的变化。该膜具有良好的机械强度，可用于油水混合物的分离。
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.
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