摘要
聚乙烯醇／壳聚糖共混膜优先透醇性能的研究王新平，沈之荃，张富尧，林荣轩（浙江大学高分子系，化学系，杭州，３１００２７）关键词渗透蒸发，聚乙烯醇／壳聚糖共混物膜，乙醇水溶液本文首次报道利用亲水性的聚乙烯醇和壳聚糖制得具有很高的乙醇优先透过选择性的透醇型...
It has been recognized generally that glassy polymer membranes preferentially permeate water and elastomer membranes preferentially permeate ethanol.Until now only a few alcohol-selective membranes have been developed such as silicone rubber membrane,having low flux and selectivity toward alcohol.In this paper,preferential separation of ethanol from aqueous solution through hydrophilic PVA/CS blend membrane has been investigated for the t time.The results show that PVA/CS membrane preferentially permeate ethanol at lower ethanol concentration in feed,and the selectivity of chitosan membrane toward alcohol can be greatly improved by introducing water-soluble polymer PVA into chitosan. The membrane with PVA content of 53% (wt%) gives a separation factor 17.1 and a flux of 217 g·m-2·h-1 at 8.7%(wt%) of ethanol in the feed at 20℃. The separation properties of this membrane were much higher than those of silicone rubber membrane usually used as alcohol-selective one.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第6期978-980,共3页
Chemical Journal of Chinese Universities
基金
国家教育委员会博士点基金
浙江省科学技术委员会资助
关键词
渗透蒸发
聚乙烯醇
壳聚糖
乙醇
共混膜
Pervaporation Poly(vinyl alcohol)/chitosan blend membrane Watere thanol mixture
