CAJ | 학술논문

运用直接掺杂法制备的磺化聚芳醚砜酮/磷钨酸(SPPESK/PWA)复合质子交换膜存在PWA流失严重的问题,影响了膜的正常使用.为了解决这一问题,以壳聚糖(CS)和PWA为聚阴阳离子电解质对,对复合膜进行静电层层(LBL)自组装改性研究,对膜的吸水率、溶胀度、质子传导率等性能进行了表征,并测试了膜中PWA的稳定性.经测定,SPPESK/PWA/(CS/PWA)2 的质子传导率达到 154mS/cm(80℃),高于相应的 SPPESK 膜(118mS/cm)及SPPESK/PWA膜(147mS/cm);SPPESK/PWA/(CS/PWA)4在80℃水中浸泡30天后,膜的质量损失率由18.45%降为11.81%,电导率损失率由32.20%降为16.77%.结果表明,该方法不仅提高了复合膜的质子传导率,并且有效抑制了PWA的流失.
운용직접참잡법제비적광화취방미풍동/린오산(SPPESK/PWA)복합질자교환막존재PWA류실엄중적문제,영향료막적정상사용.위료해결저일문제,이각취당(CS)화PWA위취음양리자전해질대,대복합막진행정전층층(LBL)자조장개성연구,대막적흡수솔、용창도、질자전도솔등성능진행료표정,병측시료막중PWA적은정성.경측정,SPPESK/PWA/(CS/PWA)2 적질자전도솔체도 154mS/cm(80℃),고우상응적 SPPESK 막(118mS/cm)급SPPESK/PWA막(147mS/cm);SPPESK/PWA/(CS/PWA)4재80℃수중침포30천후,막적질량손실솔유18.45%강위11.81%,전도솔손실솔유32.20%강위16.77%.결과표명,해방법불부제고료복합막적질자전도솔,병차유효억제료PWA적류실.
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.