季铵化聚砜/改性蒙脱土阴离子交换膜的制备与表征  

Preparation and Characterization of Anion-Exchange Membranes Based on Quaternized Polysulfone and Modified Montmorillonite

作　　者：严秋玲[1] 龚玉娇[1] 殷先泽[1] 张宏伟[1] 

机构地区：[1]武汉纺织大学材料学院,湖北武汉430073

出　　处：《高分子材料科学与工程》2016年第4期168-172,178,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51403165)

摘　　要：以聚乙烯亚胺(PEI)和二甲基二烯丙基氯化铵-丙烯酰胺共聚物(PAADDA)为改性剂,对蒙脱土K10纳米片进行了包覆。将改性K10添加于氯甲基化聚砜的N,N-二甲基乙酰胺溶液中制备复合膜,经季铵化和碱化处理得到复合的阴离子交换膜。采用傅里叶变换红外光谱、X射线衍射仪、热重分析仪对改性蒙脱土和阴离子交换膜进行了表征,并测试了阴离子交换膜的吸水率、力学性能和离子传导率。结果表明,PEI和PAADDA成功包覆于K10纳米片表面,复合的阴离子交换膜吸水率、热稳定性和力学性能与季铵化聚砜膜相比都有明显改善,PAADDA改性K10含量为5%的阴离子交换膜具有最高的离子传导率,60℃时超过3.0×10-2S/cm。Polyethylenimine（ PEI） and poly（ acrylamide-co-diallyldimethylammonium chloride）（ PAADDA） were used to modify montmorillonite K10 by surface coating method. Then the modified K10 was dispersed in N,N-dimethylacetamide solution of chloromethylated polysulfone to prepare composited membranes. At last,the composited anion-exchange membranes（ AEM） were obtained by quaternization-alkalization method. FT-IR,XRD and thermogravimetric analysis were employed to investigate modified K10 and composited AEMs. Furthermore,some important properties of AEMs were investigated,including water uptake,thermal stability mechanical property and ion conductivity. The results show that the surface coating of K10 nano-sheets is successful. Compared with the quaternized polysulfone membrane,all the composited AEMs display reduced water uptake,increased ultimate stress,enhanced decomposition temperature of quaternary ammonium groups. The composited AEM containing 5% K10 nano-sheets coated by PAADDA exhibits the highest ionic conductivity,which is in excess of 3. 0 × 10- 2S / cm at 60 ℃.

关 键 词：季铵化聚砜 改性蒙脱土 阴离子交换膜 离子传导率 

分 类 号：TB383[一般工业技术—材料科学与工程]