论文部分内容阅读
通过自由基加聚反应制备了聚偏氟乙烯(PVDF)/聚苯乙烯磺酸(PSSA)复合膜,通过SEM、EDX、电化学阻抗谱(EIS)和TG等方法表征复合膜的微结构、电化学及尺寸稳定性和力学性能等性能与反应时间的关系.结果表明,随着反应时间的延长,PVDF/PSSA复合膜的含水率、质子传导率逐渐增大.反应时间为8 h的复合膜,其含水率在常温下达到4.4%,质子传导率达到0.375 S/cm,抗拉强度为32.1 MPa。这表明,在采用自由基加聚反应制备的复合膜中形成了稳固的半互穿网络(SIPN)结构,在保持一定的热稳定性能、尺寸稳定性以及力学性能的条件下,其质子传导性能明显改善.
Polyvinylidene fluoride (PVDF) / polystyrenesulfonic acid (PSSA) composite membranes were prepared by free radical polymerization. The microstructure of the composite membranes was characterized by SEM, EDX, electrochemical impedance spectroscopy (EIS) Electrochemical and dimensional stability and mechanical properties and the relationship between the performance and reaction time.The results show that with the extension of the reaction time, the moisture content and proton conductivity of the PVDF / PSSA composite membrane gradually increase.The reaction time is 8 h composite The membrane had a water content of 4.4% at room temperature, a proton conductivity of 0.375 S / cm and a tensile strength of 32.1 MPa. This indicates that a stable semi-interpenetrating network (SIPN) structure is formed in the composite membrane prepared by the free radical addition polymerization, and its proton conduction performance is maintained under the conditions of certain thermal stability, dimensional stability and mechanical properties Significant improvement.