Crosslinked poly(ether ether ketone): cost-effective proton exchange membranes for fuel cell application

Bulletin of Materials Science

关键词: Random copolymers;    sulphonation;    crosslinking;    morphology;    thermal stability.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Sulphonated poly(ether ether ketone) copolymers bearing pendant carboxylic acid (SPEEK-C) have beensynthesized via nucleophilic condensation reaction of 4,4$^{\prime}$-difluorobenzophenone, sulphonated 4,4$^{\prime}$-difluorobenzophenoneand 3,5-dihydroxy benzoic acid. The structure of the sulphonated copolymer was identified from FT-IR and ${}^1$H-NMRspectrum. The pendant carboxylic groups of SPEEK-C were further crosslinked with poly(vinyl alcohol) (PVA) to fabricatethe crosslinked (SPEEK/PVA) membranes. The performance of the membranes was evaluated in terms of water uptake,proton conductivity and oxidative stability. The thermal stabilities of the membranes were determined by thermogravimetricanalysis and differential scanning calorimetry techniques, whereas the morphological analysis was performed by atomicforce microscopy.

【 授权许可】

CC BY