Pervaporation (PV) has mainly been used for dehydration in industrial applications as well as for the recovery of some organic components from various organic or water mixtures. Nevertheless, to date, pervaporation has never been seen as a potential industrial solution to get drinkable water by water permeation, contrarily to membrane distillation (MD). Nevertheless, at the lab scale, some studies with hydrophilic PV membranes have been reported. This work intends to underline the potential industrial interest of hydrophobic PV composite membranes for desalination. Indeed, even in hypersaline solutions, the water activity remains very high (>0.9), and it is wise to use membranes with stable properties in water to guarantee steady performance. Therefore, this study investigates the interest of hydrophobic polymers as coating selective layers for desalination. To guide our choice, a rational approach was used based on the prediction of the membrane resistance to water transfer. Polymethylpentene, poly(1-trimethylsilyl-1-propyne) and Teflon™ AF2400 were tested as the top layer to obtain hydrophobic composite PV membranes. Several feed NaCl solutions with or without a surfactant were used to investigate the mass transfer properties of these PV membranes for water treatment comparatively to more conventional porous membranes (e.g. PVDF) currently studied in membrane distillation.

全蒸发（PV）主要用于工业应用中的脱水以及从各种有机或水混合物中回收某些有机成分。然而，迄今为止，与膜蒸馏（MD）相反，渗透蒸发从未被视为通过水渗透获得饮用水的潜在工业解决方案。然而，在实验室规模上，已经报道了一些对亲水性PV膜的研究。这项工作旨在强调疏水性PV复合膜用于脱盐的潜在工业利益。实际上，即使在高盐溶液中，水的活性仍然很高（> 0.9），因此明智的做法是使用在水中具有稳定特性的膜来保证稳定的性能。所以，这项研究调查了疏水聚合物作为脱盐涂层选择层的兴趣。为了指导我们的选择，在预测膜对水转移的抵抗力的基础上，采用了一种合理的方法。测试了聚甲基戊烯，聚（1-三甲基甲硅烷基-1-丙炔）和Teflon™AF2400作为顶层，以获得疏水性复合PV膜。与目前在膜蒸馏中研究的更常规的多孔膜（例如PVDF）相比，使用了几种含或不含表面活性剂的NaCl进料溶液来研究这些PV膜用于水处理的传质性能。将聚（1-三甲基甲硅烷基-1-丙炔）和Teflon™AF2400作为顶层进行测试，以获得疏水性复合PV膜。与目前在膜蒸馏中研究的更常规的多孔膜（例如PVDF）相比，使用了几种含或不含表面活性剂的NaCl进料溶液来研究这些PV膜用于水处理的传质性能。将聚（1-三甲基甲硅烷基-1-丙炔）和Teflon™AF2400作为顶层进行测试，以获得疏水性复合PV膜。与目前在膜蒸馏中研究的更常规的多孔膜（例如PVDF）相比，使用了几种含或不含表面活性剂的NaCl进料溶液来研究这些PV膜用于水处理的传质性能。