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首页> 外文期刊>Journal of Applied Polymer Science >Modified polydimethylsiloxane/polystyrene blended IPN pervaporation membrane for ethanol/water separation
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Modified polydimethylsiloxane/polystyrene blended IPN pervaporation membrane for ethanol/water separation

机译：用于乙醇/水分离的改性聚二甲基硅氧烷/聚苯乙烯共混IPN全蒸发膜

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摘要

In this article a modified polydimethylsiloxane (PDMS) blended polystyrene (PS) interpenetrating polymer network (IPN) membranes supported by Teflon (polytetrafluoroethylene) ultrafiltration membrane were prepared for the separation of ethanol in water by pervaporation application. The relationship between the surface characteristics of the surface-modified PDMS membranes and their permselectivity for aqueous ethanol solutions by pervaporation are discussed. The IPN supported membranes were prepared by sequential IPN technique. The IPN supported membrane were tested for the separation performance on 10 wt % ethanol in water and were characterized by evaluating their mechanical properties, swelling behavior, density, and degree of crosslinking. The results indicated that separation performance, mechanical properties, density, and the percentage of swelling of IPN membranes were influenced by degree of crosslink density. Depending on the feed temperature, the supported membranes had separation factors between 2.03 and 6.00 and permeation rates between 81.66 and 144.03 g m~(-2) h~(-1). For the azeotropic water-ethanol mixture (10 wt % ethanol), the supported membrane had at 30°C a separation factor of 6.00 and a permeation rate of 85 g m~(-2) h ~(-1). Compared to the PDMS supported membranes, the PDMS/PS IPN supported blend membrane ones had a higher selectivity but a somewhat lower permeability.
机译：本文制备了一种改性的聚二甲基硅氧烷（PDMS）共混的聚苯乙烯（PS）互穿聚合物网络（IPN）膜，该膜由铁氟龙（聚四氟乙烯）超滤膜支撑，用于通过全蒸发应用分离水中的乙醇。讨论了表面改性的PDMS膜的表面特性与其通过全蒸发对乙醇水溶​​液的渗透选择性之间的关系。通过顺序IPN技术制备IPN支撑的膜。测试了IPN支撑的膜在10 wt％乙醇在水中的分离性能，并通过评估其机械性能，溶胀行为，密度和交联度对其进行了表征。结果表明，交联密度会影响IPN膜的分离性能，力学性能，密度和溶胀百分比。取决于进料温度，负载的膜的分离系数在2.03至6.00之间，渗透速率在81.66至144.03g m·（-2）h·（-1）之间。对于共沸水-乙醇混合物（10重量％乙醇），负载的膜在30℃下的分离系数为6.00，渗透速率为85g m·（-2）·h·（-1）。与PDMS支撑的膜相比，PDMS / PS IPN支撑的共混膜具有更高的选择性，但渗透率却较低。

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