全硅沸石/聚二甲基硅氧烷渗透汽化膜制备及分离性能  

Preparation and separation performance of hybrid pervaporation membrane of silicalite-1/polydimethylsiloxane

作　　者：周浩力[1,2] 苏仪[1] 万印华[1] 

机构地区：[1]中国科学院过程工程研究所生化工程国家重点实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《化学工程》2011年第3期46-49,58,共5页Chemical Engineering(China)

基　　金：国家973计划资助项目(2007CB714305)

摘　　要：考察了全硅沸石/聚二甲基硅氧烷(PDMS)渗透汽化均质膜制膜液中固液比(质量比)对渗透汽化膜性能的影响,利用均匀设计优化方法对交联时间、交联温度、全硅沸石填充量和PDMS中b胶量等对膜分离因子的影响进行了研究,制备了对丁醇分离性能较高的渗透汽化均质膜。50℃下,分离原料液质量分数为1.6%的丙酮-丁醇-乙醇-水溶液时,渗透汽化膜对丁醇/水的分离因子高达120。考察了膜厚度和原料液质量分数对渗透汽化均质膜的分离性能的影响。结果显示膜的分离因子不随膜厚的减小而减小,而透过液中丁醇质量浓度随料液中丁醇质量分数升高而增大。The effect of solid-liquid ratio（mass ratio） on the separation performance of silicalite-1/polydimethylsiloxane（PDMS） membrane was investigated.The uniform design（UD） was used to study the effects of crosslinking time,crosslinking temperature,silicalite-1 content,and concentration of b part in PDMS on membrane separation factor.A membrane with high selective separating performance for butanol was obtained under the optimal preparing conditions.The separation factor of the home-made silicalite-1/PDMS membrane for butanol/water is 120 with acetone-butanol-ethanol（mass fraction 1.6%）-water solution at 50 ℃.The effects of membrane thickness and feed mass fraction on the separation performance were studied.The results show that membrane selectivity is more or less constant with decreasing membrane thickness,and butanol mass concentration in the permeate increases with increasing the mass fraction of feed butanol.

关 键 词：渗透汽化 均匀设计 膜厚 丁醇 

分 类 号：TQ028.8[化学工程]