制膜条件对硅橡胶膜微结构及分离性能的影响  

Pervaporation performance of PDMS composite membranes for separation of ethanol/water mixtures(Ⅱ)and effect of membrane preparation conditions

作　　者：展侠[1] 于群[1] 冯旭东[1] 叶宏[1] 蒋佳雨[1] 李继定[2] 

机构地区：[1]北京工商大学食品学院,北京100048 [2]清华大学化学工程系,北京100084

出　　处：《化工新型材料》2013年第1期121-123,共3页New Chemical Materials

基　　金：国家自然科学基金项目(21206001;20906001;21176135);国家863计划项目(2012AA03A607);北京市大学生科学研究与创业行动计划建设项目(PXM2012-014213-000067);北京工商大学青年教师科研启动基金(QNJJ2011-25);中国博士后科学基金(20100470015)

摘　　要：以PVDF超滤膜为支撑层,以107、108、RT-615为3种硅橡胶的复合层,制备了交联硅橡胶/PVDF复合膜用于渗透汽化乙醇/水的分离。采用SEM表征了硅橡胶/PVDF复合膜的表面及断面形貌,测定了交联硅橡胶均质膜的溶胀度、密度和交联链长度,考察了硅橡胶交联结构、交联剂用量、交联温度对硅橡胶膜微观结构与分离性能的影响,得到了硅橡胶最佳制膜条件。研究发现与加成型交联硅橡胶(RT-615)相比,脱醇型交联硅橡胶(108、107)交联链长度较大,膜自由体积较大,更适于低浓度乙醇/水混合物的分离。PDMS/PVDF composite membranes were prepared with PVDF ultrafiltration membrane as support layer and cross-linked PDMS（107,108, RT-615）as selective layer. The surface and cross-section morphology of PDMS/PVDF membranes were characterized by SEM. The swelling ratio, density, and cross-linking chain length of PDMS homogeneous membranes were measured. The effect of species of PDMS, concentration of cross-linking reagents and cross-linking tem- perature on the pervaporation performance of membranes were studied, and the optimal preparation conditions of PDMS/ PVDF membranes were determined.

关 键 词：硅橡胶 制膜条件 微结构 乙醇 水混合物 渗透汽化 

分 类 号：TB383.2[一般工业技术—材料科学与工程]