Pervaporation is considered to have great potential for application in the field of organic-solvent dehydration. In this study, a type of keto-enamine-linked covalent organic framework TpPa (synthesized using the Schiff-base reaction of 1,3,5-triformylphloroglucinol [Tp] with p-phenylenediamine [Pa]), was fabricated on commercial polyacrylonitrile (PAN) ultrafiltration membranes through an oxygen-plasma assisted contra-diffusion self-assembly strategy for organic-solvent dehydration. The PAN membranes with a glycerol exhibited a better separation factor for dehydration of organic solvents than those without a glycerol layer. The influence of oxygen plasma and glycerol on the formation of the TpPa membrane was investigated. The best plasma treatment condition and optimum glycerol impregnation concentration were determined as a device power of 60 W and 30 wt%, respectively. Defect-free TpPa membrane formation took only 24 h. The as-prepared TpPa membrane exhibited a separation factor of 1491 and a high permeation flux of 2530 g m⁻² h⁻¹ for a 90 wt% isopropanol–water mixture. The separation performance of the TpPa membrane was stable for >100 h, exhibiting great potential in organic-solvent dehydration.

渗透蒸发被认为在有机溶剂脱水领域具有巨大的应用潜力。在这项研究中，一种酮-烯胺连接的共价有机骨架 TpPa（使用 1,3,5-三甲酰间苯三酚 [Tp] 与p的席夫碱反应合成）-苯二胺 [Pa])，通过氧等离子体辅助逆扩散自组装策略在商业聚丙烯腈 (PAN) 超滤膜上制备，用于有机溶剂脱水。与没有甘油层的 PAN 膜相比，具有甘油的 PAN 膜对有机溶剂的脱水表现出更好的分离因子。研究了氧等离子体和甘油对TpPa膜形成的影响。最佳等离子体处理条件和最佳甘油浸渍浓度分别确定为 60 W 和 30 wt% 的器件功率。无缺陷的 TpPa 膜形成仅需 24 小时。所制备的 TpPa 膜具有 1491 的分离因子和 2530 g m ^-2  h ^{-1的高渗透通量}对于 90 wt% 的异丙醇-水混合物。TpPa膜的分离性能稳定> 100 h，在有机溶剂脱水中表现出巨大的潜力。