纳米SiO_2杂化PVDF-g-PSSA离子交换膜的制备及性能研究  

Preparation and properties of SiO_2 hybrid PVDF-g-PSSA ion exchange membrane

作　　者：王磊[1] 孔梦晓[1] 李陈[1] 王旭东[1] 张全[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2017年第4期542-547,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金(51278408)

摘　　要：实验以过氧化苯甲酰(BPO)为引发剂,在聚偏氟乙烯(PVDF)分子链上接枝对苯乙烯磺酸钠(SSS)的同时掺杂二氧化硅(SiO_2)颗粒,进而得到复合离子交换膜(PVDF/xSiO_2-g-PSSA).通过傅里叶红外分光光度计(FT-IR)、X射线衍射仪(XRD)和耗散型石英晶体微天平(QCM-D)分析了膜的化学组成、结晶形态和抗污染性,并考察不同SiO_2添加量对膜的亲水性和电导率性质的影响.结果表明:添加SiO_2使膜的亲水性能显著提高,电导率略微下降.通过QCM-D测试发现,亲水性材料SiO_2的加入,使膜表面污染物的吸附量下降,抗污染性增强,有利于提高微生物燃料电池(MFCs)在长期运行中的稳定性.In this investigation, benzoyl peroxide （BPO） was used as an initiator, concurrently, silica （SiO2） was doped on the molecular chain of the polyvinylidene fluoride （PVDF） coupled with sodium styrene sulfonate（SSS）. After that, the composite proton exchange membrane （PVDF/xSiO2-g-PSSA） could be obtained. Chemistry constitution, crystal morphology and antipollution were analyzed by fourier transform infrared spectrophotometer （FT-IR）, x-ray diffractometer （XRD） and quartz crystal microbalance （QCM-D）. At the same time, the effects of different SiO2 concentration on the hydrophily and conductivity of membrane were investigated. The results showed that the hydrophilic property could be significantly improved and conductivity fell slightly by adding SiO2. The QCM-D tests show that adding SiO2 decreased adsorption quantity of pollutants on the surface of membrane and improved antipollution, which presented a potential favorable application in the fuel cell.

关 键 词：离子交换膜 耗散型石英晶体微天平 亲水性 二氧化硅 抗污染性能 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]