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 separationthrough 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 αO/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 1684.7 while the value of flux was about 336.0g·m-2·h-1.
参考文献
| [1] | 张世民,毕经京,杨启云,陈观文.TMSP-PMDSP共聚物膜的氧、氮透过性[J].功能高分子学报,1992(03):199-207. |
| [2] | MASUDA T;Takatsuka M;Tang B Z et al.Pervaporation of organic liquid-water mixtures through substituted polyacetylene membranes[J].Journal of Membrane Science,1990,49:69. |
| [3] | Savoca A C;Surnamer A D;Chao F T .Extraction of organic contaminants in aqueous solutions by pervaporation[J].Macromolecules,1993,26:6211. |
| [4] | Bell C M;Gerner F J;Strachmann H .Selection of polymers for pervaporation membranes[J].Journal of Membrane Science,1988,36:315-329. |
| [5] | Zhang SM.;Drioli E. .PERVAPORATION MEMBRANES [Review][J].Separation Science and Technology,1995(1):1-31. |
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