改性聚偏氟乙烯接枝苯乙烯磺酸质子导电膜的结构与形貌  

The Structure and Morphology of the PVDF-g-PSSA Membrane Prepared by the Plain Sodium Silicate(Na_4SiO_4)

作　　者：郭贵宝[1,2] 寇沙沙[3] 孟淑敏[3] 安胜利[1,3] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]内蒙古科技大学生物与化学工程学院,内蒙古包头014010 [3]内蒙古科技大学材料与冶金工程学院,内蒙古包头014010

出　　处：《高分子材料科学与工程》2009年第9期43-46,共4页Polymer Materials Science & Engineering

基　　金：内蒙古自治区优秀学科带头人基金项目(20071103);高校青年教师教学科研奖励计划项目(2002)

摘　　要：以过氧化苯甲酰(BPO)作引发剂,通过溶液接枝聚合法把苯乙烯接枝到原硅酸钠改性的聚偏氟乙烯(PVDF)膜上,磺化后得到聚偏氟乙烯接枝苯乙烯磺酸(PVDF-g-PSSA)电解质膜。研究发现,原硅酸钠改性的PVDF膜与苯乙烯发生接枝聚合反应,且接枝率与添加原硅酸钠的质量分数呈线性变化关系。用红外光谱检测原硅酸钠改性的PVDF膜经过接枝和磺化后所发生的结构变化,并用扫描电镜(SEM)观察PVDF膜接枝前后的形貌以及接枝磺化后产物PVDF-g-PSSA膜的形貌及硫和硅分布。研究表明,原硅酸钠改性的PVDF膜与苯乙烯进行接枝共聚反应时,PVDF膜结构在接枝前后和磺化前后发生变化,确认苯乙烯接枝到PVDF膜上。A new method based on a solution graft technique was used to prepare poly（vinylidene fluoride） grafted polystyrene sulfonated acid （PVDF-g-PSSA） proton exchange membrane. Polystyrene is easily grafted into PVDF doped plain sodium silicate （Na4SiO4）. There is a linear relationship between the degree of grafting and the content of Na4Si04. Fourier transform infrared spectroscopy was used to characterize changes of the membrane＇ s microstructures after grafting and sulphonation. The morphology of the membrane＇ s microstructures after grafting and sulphonation was studied by scanning electrolytic microscope. The results show that the styrene has been grafted on the PVDF.

关 键 词：聚偏氟乙烯 苯乙烯 溶液接枝 质子交换膜 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]