CJCU

Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (11): 2306.

• Articles • Previous Articles     Next Articles

Syntheses and Properties of Directly Crosslinked Sulfonated Poly(arylene ether sulfone)s for Proton Exchange Membrane Fuel Cells

BI Hui-Ping, CHEN Shou-Wen*, WANG Jia-Li, ZHANG Xuan, GAO Zhi-Lin, ZHANG Sha, TAO Ying-Yong, WANG Lian-Jun*   

  1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2009-03-06 Online:2009-11-10 Published:2009-11-10
  • Contact: CHEN Shou-Wen, E-mail: shouwenchen@yahoo.com.cn; WANG Lian-Jun, E-mail: wanglj@mail.njust.edu.cn
  • Supported by:

    江苏省自然科学基金(批准号: BK2007211)、教育部留学回国人员和南京理工大学留学回国人员科研启动基金资助.

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Abstract:

A series of crosslinked sulfonated poly(arylene ether sulfone)s were synthesized from 4,4′-difluorodiphenyl sulfone(DFDPS), 4,4′-biphenol(BP), 3,3′-disulfonate-4,4′-difluorodiphenyl sulfone(SDFDPS) and 1,3,5-trihydroxy benzene(THB) by nucleophilic substitution polycondensation reactions. The trifunctional crosslinker of THB was in the mass fraction range of 3%—7%. The structures of the polymers were confirmed by 1H NMR and FTIR. The membranes were obtained by solution casting. The properties of the membranes including the ion exchange capacity(IEC), water uptake, diamensional change, mechanic property and proton conductivity were investigated. The results show that the water swelling is decreased after the cross-linking treatment. For the CSPAES membrane of M(6/4-6), with IEC of 2.43 meq/q, it show proton conductivity of 260.5 mS/cm in water at 60 ℃, which is almost twice to that of Nafion 112.

Key words: Crosslink; Sulfonated poly(arylene ether sulfone); Proton exchange membrane; Water stability; Fuel cell

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