Sodium alginate-polyvinyl alcohol/polysulfone (SA-PVA/PSF) hollow fiber composite pervaporation membrane for dehydration of ethanol-water solution

用于乙醇-水分离的SA-PVA/PSF中空纤维渗透汽化复合膜(英文)

Using polysulfone （PSF） hollow fiber ultrafiltration membranes as the substrate, sodium alginate （SA） and polyvinyl alcohol （PVA） blend solutions as the coating solution, and maleic anhydride （MAC） as the cross-linked agent, SAPVA/PSF hollow fiber composite membranes were prepared for the dehydration of ethanol-water. The effects of different sodium alginate concentration in the coating solutions and different operating temperatures on pervaporation performance were investigated. The experimental results showed that pervaporation performance of the SA-PVA/PSF composite membranes for ethanol-water solution exhibited a high separation factor although they had a relatively low permeation flux. As SA concentration in SA-PVA coating solution was 66.7% and the operating temperature was 40 ℃, SA-PVA/PSF hollow fiber composite membrane （PS4） had a separation factor of 886 and flux of 12.6 g/（m^2·h）. Besides, SA-PVA/PSF hollow fiber composite membranes （PS3 and PS4） were used for the investigation of the effect of ethanol concentration in the feed solution on pervaporation performance.

用 polysulfone ( PSF )空纤维是的极端过滤膜底层，钠藻朊吃了( SA )并且聚乙烯醇( PVA )作为 cross-linked 代理人作为涂层答案，和顺一丁烯二酸酐( MAC )混合答案， SAPVA/PSF 空纤维合成的膜为乙醇水的脱水作好准备。不同的钠藻朊的效果在涂层解决方案吃了集中，过蒸发性能上的不同操作温度被调查。尽管他们有相对低的浸透流动，试验性的结果证明为乙醇水答案的 SA-PVA/PSF 合成的膜的过蒸发性能展出了一个高分离因素。因为在 SA-PVA 涂层答案的 SA 集中是 66.7% ，操作温度是 40 ° C， SA-PVA/PSF 空纤维合成的膜(PS4 ) 有 886 的一个分离因素和 12.6 g/ 的流动(m 2 · h) 。而且， SA-PVA/PSF 空纤维合成的膜(PS3 和 PS4 ) 在过蒸发性能上在 feed 解决方案被用于乙醇集中的效果的调查。