原位溶胶-凝胶法制备磺化聚苯醚/溴化聚苯醚共混杂化离子膜

Preparation of SPPO and BPPO composite hybrid membranes by in-situ sol-gel method

文章利用有机高分子聚合物溴化聚(2,6-二甲基-1,4-苯醚)(BPPO)、γ-胺丙基三乙氧基硅烷(A1100)以及二甲胺水溶液反应,再与聚合物磺化聚(2,6-二甲基-1,4-苯醚)(SPPO)共混,通过原位溶胶-凝胶法制备酸碱对杂化膜。该膜具有较好的热稳定性和化学稳定性、较高的离子交换容量以及质子电导率。合适质量分数的A1100所制备膜的离子交换容量值为1.47mmol/g、水质量分数为22%、拉伸强度为47.0 MPa,断裂伸长率为37%,质子传导率为0.027S/cm。与一般的杂化膜相比,该离子膜引入了酸碱对的作用,因此对膜的稳定性及质子传导率方面有显著的影响。

The acid-base hybrid membranes were prepared by sol-gel reaction of brominated poly（2,6- dimethyl-1,4-phenylene oxide）（BPPO）, γ-triethoxysilane（All00） and dimethyl amine, blending with sulfonated poly（2, 6-dimethyl-1,4-phenylene oxide）（SPPO）. The membranes possess high thermal and chemical stabilities, ion exchange capacity and proton conductivity. The membrane prepared with appropriate dosage of All00 possesses the following performances, ion exchange capacity is 1. 47 mmol/g, water content is 22%, tensile strength is 47.0 MPa, elongation at break is 37% and proton conductivity is 0. 027 S/cm. Compared with common hybrid membranes, the stability and proton con- ductivity of the membrane can be improved because of the acid-base pair.