Date of Publication:2015-01-01

Journal:化工进展

Issue:12

Page Number:4285-4289,4294

ISSN:1000-6613

Abstract:The sulfonated poly(phthalazinone ether sulfone ketone)/phosphotungstic acid (SPPESK/ PWA) composite membrane prepared by the direct doping method has a problem of serious outflow, which affects the application of the membrane in fuel cells. To solve that,electrostatic layer-by-layer (LBL) self-assembly was employed to modify the SPPESK/PWA membrane using chitosan (CS) as the polycation and PWA as the polyanion. Properties such as water uptake,swelling ratio and proton conductivity were measured,and stability of PWA was analyzed meantime. It is shown that conductivity of the SPPESK/PWA/(CS/PWA)2membrane reaches 154mS/cm (80℃),higher than that of the SPPESK membrane (118mS/cm) and the SPPESK/PWA membrane (147mS/cm). In addition,for the SPPESK/PWA/(CS/PWA)4membrane,after soaked in 80℃ water for 30 days,weight loss ratio decreases from 18.45% to 11.81%,and conductivity loss ratio decreases from 32.20% to 16.77%. The results indicate that the LBL self-assembly method improves the proton conductivity and restricts the PWA loss.

Note:新增回溯数据