Golubev Georgy, Sokolov Stepan, Rokhmanka Tatyana, Makaev Sergey, Borisov Ilya, Khashirova Svetlana, Volkov Alexey
A.V. Topchiev Institute of Petrochemical Synthesis RAS, 29 Leninsky prospekt, 119991 Moscow, Russia.
Department of Organic Chemistry and Macromolecular Compounds, Kabardino-Balkar State University named after H.M. Berbekov, 173 Chernyshevsky St., 360004 Nalchik, Kabardino-Balkarian Republic, Russia.
Polymers (Basel). 2022 Jul 20;14(14):2944. doi: 10.3390/polym14142944.
For the first time, membranes based on poly(1-trimethylsilyl-1-propyne) (PTMSP) with 5-50 wt% loading of hyper-crosslinked polystyrene sorbent particles (HCPS) were obtained; the membranes were investigated for the problem of effective removal of volatile organic compounds from aqueous solutions using vacuum pervaporation. The industrial HCPS sorbent Purolite Macronet™ MN200 was chosen due to its high sorption capacity for organic solvents. It has been found that the membranes are asymmetric when HCPS content is higher than 30 wt%; scanning electron microscopy of the cross-sections the membranes demonstrate that they have a clearly defined thin layer, consisting mainly of PTMSP, and a thick porous layer, consisting mainly of HCPS. The transport and separation characteristics of PTMSP membranes with different HCPS loading were studied during the pervaporation separation of binary and multicomponent mixtures of water with benzene, toluene and xylene. It was shown that the addition of HCPS up to 30 wt% not only increases the permeate fluxes by 4-7 times, but at the same time leads to 1.5-2 fold increase in the separation factor. It was possible to obtain separation factors exceeding 1000 for all studied mixtures at high permeate fluxes (0.5-1 kg/m∙h) in pervaporation separation of binary solutions.
首次制备了负载量为5 - 50 wt%超交联聚苯乙烯吸附剂颗粒（HCPS）的聚（1 - 三甲基硅基 - 1 - 丙炔）（PTMSP）基膜；使用真空渗透蒸发法研究了这些膜用于从水溶液中有效去除挥发性有机化合物的问题。由于工业用HCPS吸附剂Purolite Macronet™ MN200对有机溶剂具有高吸附容量，所以选用了它。已发现当HCPS含量高于30 wt%时，膜是不对称的；对膜横截面的扫描电子显微镜观察表明，它们有一个明确界定的薄层，主要由PTMSP组成，还有一个厚的多孔层，主要由HCPS组成。在水与苯、甲苯和二甲苯的二元及多组分混合物的渗透蒸发分离过程中，研究了不同HCPS负载量的PTMSP膜的传输和分离特性。结果表明，添加高达30 wt%的HCPS不仅使渗透通量增加4 - 7倍，同时还使分离因子提高1.5 - 2倍。在二元溶液的渗透蒸发分离中，对于所有研究的混合物，在高渗透通量（0.5 - 1 kg/m∙h）下可以获得超过1000的分离因子。
