纳米ZnO含量对PVDF阳离子交换膜性能的影响

The Effect of ZnO Nanoparticles Content on the Performance of PVDF Cation-Exchange Membranes

通过碱化、接枝和磺化反应制备了不同含量的纳米ZnO粒子的聚偏氟乙烯(PVDF)有机-无机杂化阳离子交换膜,研究ZnO纳米粒子含量对膜性能的影响。采用扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT IR)表征膜结构,采用电化学工作站交流阻抗法等表征膜综合性能。结果表明,接枝和磺化反应在PVDF链上引入了苯乙烯和磺酸基团。当纳米ZnO粒子的质量分数为1.5%时膜的综合性能达到最佳,膜的离子交换容量为2.36 mmol/g、水的质量分数为158.7%、膜迁移数为91.44%,氧化后质量损失率为2.84%,可用于电驱动分离或其他电化学过程。

Polyvinylidene fluoride(PVDF) organic-inorganic hybrid cation exchange membranes with different contents of nano-ZnO nanoparticles were prepared by alkalization, grafting and sulfonation reaction. The effects of Zn O nanoparticle content on membrane properties were investigated. The structure of the membrane was characterized by scanning electron microscopy(SEM) and Fourier transform infrared spectroscopy(FT IR), and the integrated performance of the membrane was characterized by electrochemical impedance workstation. The results indicated that the grafting and sulfonation reactions introduced styrene and sulfonic acid groups on the PVDF chain. When the mass fraction of nano-ZnO particles was 1.5%, the comprehensive performance of the membrane was optimal. The ion exchange capacity of the membrane was 2.36 mmol/g, the water mass fraction was 158.7%, the membrane transport number was 91.44%, and the mass loss rate after oxidation was 2.84%, the membrane can be used for electrically driven separation or other electrochemical processes.