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为得到高效低成本的质子交换膜材料,选用磷酸锆(Zr P)引入聚酰亚胺(PI)有机基体中制备PI/Zr P质子交换复合膜。利用红外吸收光谱表征复合膜结构,通过扫描电镜观察复合膜形貌,并对复合膜的含水率、溶胀度、热稳定性和质子传导性能进行研究。实验结果表明:Zr P均匀分散在质子交换复合膜中,Zr P的加入增强了质子交换复合膜的保水性能和热稳定性。PI/Zr P质子交换复合膜能提供稳定的质子传输通道,随着Zr P掺杂量的增加复合膜的质子电导率升高,在90℃、相对湿度为100%的环境中,PI/20%Zr P复合膜的质子电导率达到3.61×10-2m S·cm-1。
In order to obtain high efficiency and low cost of proton exchange membrane materials, zirconium phosphate (Zr P) was introduced into polyimide (PI) organic matrix to prepare PI / Zr P proton exchange membrane. The structure of the composite membrane was characterized by infrared absorption spectroscopy. The morphology of the composite membrane was observed by scanning electron microscopy. The moisture content, swelling degree, thermal stability and proton conductivity of the composite membrane were studied. The experimental results show that ZrP is uniformly dispersed in the proton exchange membrane, and the addition of ZrP enhances the water retention and thermal stability of the proton exchange membrane. PI / Zr P proton exchange membrane can provide a stable proton transport channel. The proton conductivity of the composite membrane increases with the increase of Zr P doping amount. The PI / 20 The proton conductivity of the% Zr P composite membrane reached 3.61 × 10 -2 m S · cm -1.