Extensive efforts have been devoted to oil-water separation in recent years, especially the separation of water-in-oil emulsions. In this study, we report a superhydrophobic and superoleophilic PH-CNT (poly vinylidene fluoride-hexafluoropropylene, carbon nanotubes) membrane with highly porous structures for oil-water separation. The membrane possesses hierarchically layered micro/nano-porous structures both on the membrane surface and inside the nanofibers. The membrane effectively separated surfactant stabilized water-in-oil emulsions with micro/nano droplets, demonstrating a separation efficiency above 99.5%, while also exhibiting excellent recyclability with good chemical and mechanical stability. The PH-CNT membrane holds great potential for the purification of emulsified oil-water mixtures from industrial and domestic sources.

近年来，人们在油水分离，特别是油包水乳状液的分离方面投入了大量精力。在这项研究中，我们报告了一种用于油水分离的具有高度多孔结构的超疏水和超亲油 PH-CNT（聚偏二氟乙烯-六氟丙烯，碳纳米管）膜。该膜在膜表面和纳米纤维内部均具有分层的微/纳米孔结构。该膜有效分离表面活性剂稳定的具有微/纳米液滴的油包水乳液，分离效率高于99.5%，同时还表现出优异的可回收性和良好的化学和机械稳定性。PH-CNT 膜在净化工业和家庭来源的乳化油水混合物方面具有巨大潜力。