以嵌段共聚物调控中间层的SiO2复合膜的制备和表征  

Preparation and characterization of SiO_2 composite membranes regulated by block copolymers

作　　者：钟璟[1] 陈燕[1] 黄维秋[2] 陈若愚[1] 韩光鲁[1] 

机构地区：[1]江苏工业学院化学化工学院,江苏省精细石油化工重点实验室,常州213164 [2]江苏工业学院机械与能源工程学院,常州213016

出　　处：《化工新型材料》2010年第11期99-102,共4页New Chemical Materials

基　　金：江苏省自然科学基金(BK2009580,BK2008143);常州市青年人才基金(CQ2008003);常州市“831”人才工程;江苏省精细石油化工重点实验室的资助

摘　　要：采用溶胶-凝胶模板法,以三嵌段共聚物PEO20PPO70PEO20(P123)为模板剂,制备SiO2中间层膜以改善SiO2复合膜的渗透和分离性能。比较了模板剂含量对溶胶粒径和膜孔径的影响。研究表明:随着模板剂含量的增加,溶胶粒子的尺寸和所制备的中间层的孔径随之增加;中间层的加入利于制备出孔径分布窄,孔隙率高的SiO2复合膜。相对于无中间层膜,复合膜具有较高的渗透量和分离性能。在跨膜压差0.04MPa时,复合膜对氮气的渗透系数可达5×10-8mol/m2s Pa,正己烷/氮气的分离因子为2.6。The SiO2 composite membranes with interlayers were prepared by sol-gel template method with PEO20PPO70PEO20（P123） as template to improve the performance of membranes.The effect of template content on size distribution of silica sol and pore size distribution of interlayer was investigated.The results showed that the sol size and the pore size of interlayer increased with the increasing of template content;and the membranes with interlayers possessed narrow pore size distribution and high porosity.Compared to the membranes without interlayers,the permeability and selectivity of SiO2 composite membranes were improved.For SiO2 composite membranes,the permeability of nitrogen can reach 5×10-8mol/m2 s Pa and the separation factor for n-hexane/nitrogen was 2.6 at trans membrane pressure of 0.04MPa.

关 键 词：SiO2复合膜 模板剂 中间层 渗透系数 分离因子 

分 类 号：TB383.2[一般工业技术—材料科学与工程]