PTMSP及其共聚物膜对有机液/水体系的PV分离  

Organic permselective pervaporation characteristics of poly(silylpropyne) and copolymer dense membranes

作　　者：蒋晓钧[1] 陈观文[1] 

机构地区：[1]中国科学院化学研究所,北京 100080

出　　处：《膜科学与技术》2001年第1期15-20,共6页Membrane Science and Technology

基　　金：国家自然科学基金重点资助项目(59833120)

摘　　要：制备了聚三甲基硅丙炔均聚物 (PTMSP) .研究了PTMSP均质膜 ,三甲基硅丙炔(TMSP)与五甲基二硅丙炔 (PMDSP)共聚物膜对含少量有机溶剂水溶液的渗透汽化 (PV )特性 .所选用的有机溶剂包括乙醇、异丙醇、四氢呋喃、二氯甲烷、乙酸乙酯等 .从膜的溶胀特性、溶解度系数及扩散系数的测定结果 ,分析了膜材质的结构与PV特性之间的关系 .An investigation into the organic permselective separation through poly(1-trimethylsilyl-1-propyne) (PTMSP) and (1-trimethylsilyl)-1-(1-penta-methyl-disilyl)-1-propyne copolymer(TMSP-PMDSP) dense membranes was made to gain an insight into the effect of the chemical structure of membrane materials on pervaporation (PV) characteristics. The results show that the copolymer has a higher separation factor α O/W but with a relatively lower value of flux J (g·m -2 ·h -1 ) than pure PTMSP. This phenomenon may be attributed to the introduction of side chains with large bulk volume in copolymer, which brought about a decrease of excess free volume and the improvement of diffusion selectivity to some extent. The copolymer membrane showed good performance for separating 1 37wt% dichloromethane/water liquid mixture at 35?℃ and 100 Pa ; the selectivity increased to 1?684.7 while the value of flux was about 336.0?g·m -2 ·h -1 .

关 键 词：PTMSP TMSP PMDSP 共聚物 均质膜 有机液 水 渗 

分 类 号：TQ028.8[化学工程] TQ051.893