Influence of composition on the proton conductivity and mechanical properties of sulfonated poly(aryl ether nitrile) copolymers for proton exchange membranes

被引:0
|
作者
Zejun Pu
Lan Chen
Ya Long
Lifen Tong
Xu Huang
Xiaobo Liu
机构
[1] University of Electronic Science and Technology of China,Research Branch of Functional Materials, Institute of Microelectronics & Solid State Electronics, High
来源
Journal of Polymer Research | 2013年 / 20卷
关键词
Sulfonated poly(arylene ether nitrile)s; Composition; Thermal stability; Mechanical properties; Methanol permeability; Proton conductivity;
D O I
暂无
中图分类号
学科分类号
摘要
A series of sulfonated poly(arylene ether nitrile) (SPEN) copolymers with controlled degrees of sulfonation were successfully synthesized by the direct copolymerization of hydroquinonesulfonic acid potassium salt (SHQ), 2,6-difluorobenzonitrile (DFBN), and different proportions of bisphenols with different structures. Five bisphenols (bisphenol A, phenolphthalein, phenolphthalin, biphenol, and hydroquinone) were investigated for the syntheses of novel copolymers with controlled degrees of sulfonation and different compositions. The composition and structures of the SPEN copolymers were characterized by Fourier transform infrared spectroscopy. Due to their different structural units, the derived copolymers showed different glass transition temperatures of 171–199 °C, and also exhibited high thermal stability, with their 5 % weight loss temperatures ranging from 277 °C to 327 °C. Moreover, they all showed good flexibility and film-forming properties along with excellent tensile strengths of 51–67 MPa in the dry state and 18–41 MPa in the wet state. Solubility tests confirmed that the SPEN copolymers possess good solubility in polar solvents such as NMP, DMAc, DMF, and DMSO. Furthermore, these copolymer membranes exhibited good water uptake values ranging from 30.1 % to 71.2 %, and outstanding ion exchange capacities of 1.27–2.32 mmol g−1. Thus, the membranes presented good proton conductivities of 2.2 × 10−4 to 4.3 × 10−3 S cm−1 at 25 °C and 100 % RH. Furthermore, the SPEN copolymer membranes showed much lower methanol permeabilities and higher selectivities than Nafion 117. All of these attributes indicate that these SPEN copolymers are promising candidates for application in high-temperature proton exchange membranes.
引用
收藏
相关论文
共 50 条
  • [41] Influence of casting conditions on the properties of sulfonated poly(ether ether ketone ketone)/ phosphotungstic acid composite proton exchange membranes
    Li, Xianfeng
    Xu, Dan
    Zhang, Gang
    Wang, Zhe
    Zhao, Chengji
    Na, Hui
    Journal of Applied Polymer Science, 2007, 103 (06): : 4020 - 4026
  • [42] Preparation and Properties of Sulfonated Polystyrene/Sulfonated Poly(aryl ether ketone sulfone) Copolymer with Pendant Crosslinked Structure Composite Proton Exchange Membranes
    Cheng, Hailong
    Han, Kanghui
    Li, Ao
    Tao, Lujing
    Yi, Feiyang
    Sun, Jiaojiao
    CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE, 2024, 45 (08):
  • [43] Proton conductivity and properties of sulfonated polyarylenethioether sulfones as proton exchange membranes in fuel cells
    Bai, Zongwu
    Durstock, Michael F.
    Dang, Thuy D.
    JOURNAL OF MEMBRANE SCIENCE, 2006, 281 (1-2) : 508 - 516
  • [44] Proton-exchange Sulfonated Poly(ether ether ketone)/Sulfonated Phenolphthalein Poly(ether sulfone) Blend Membranes in DMFCs
    Gao Qijun
    Wang Yuxin
    Xu Li
    Wang Zhitao
    Wei Guoqiang
    CHINESE JOURNAL OF CHEMICAL ENGINEERING, 2009, 17 (06) : 934 - 941
  • [45] Synthesis and properties of highly branched sulfonated poly(arylene ether)s as proton exchange membranes
    Wang, Lei
    Wang, Dagang
    Zhu, Guangming
    Li, Junqin
    EUROPEAN POLYMER JOURNAL, 2011, 47 (10) : 1985 - 1993
  • [46] Synthesis and properties of sulfonated poly(arylene ether phosphine oxide)s for proton exchange membranes
    Ma, Xuhui
    Zhang, Chunjie
    Xiao, Guyu
    Yan, Deyue
    JOURNAL OF POWER SOURCES, 2009, 188 (01) : 57 - 63
  • [47] Preparation and Properties of Sulfonated Poly(ether sulfone)/Boron Phosphate Composite Proton Exchange Membranes
    Zheng Gen-Wen
    Gong Chun-Li
    Wen Sheng
    Zhou Huan-Bo
    Xie Xiao-Lin
    ACTA PHYSICO-CHIMICA SINICA, 2009, 25 (03) : 575 - 582
  • [48] Preparation and Properties of Proton Exchange Membranes Based on Side-chain Type Fluorinated Sulfonated Poly (aryl ether) s
    Yan, Xiao-bo
    Zhang, Xu-lve
    Yuan, Zu-feng
    Geng, Hui
    Bi, Hui-ping
    Hu, Zhao-xia
    Chen, Shou-wen
    ACTA POLYMERICA SINICA, 2016, (05): : 577 - 583
  • [49] Preparation and properties of sulfonate modification nano-diamonds doped sulfonated poly(aryl ether sulfone) proton exchange membranes
    Wang M.
    Liu L.
    Li N.
    Hu Z.
    Chen S.
    Huagong Jinzhan/Chemical Industry and Engineering Progress, 2022, 41 (10): : 5645 - 5652
  • [50] Synthesis and properties of sulfonated polyimide–polybenzimidazole copolymers as proton exchange membranes
    Wei Li
    Xiaoxia Guo
    Jianhua Fang
    Journal of Materials Science, 2014, 49 : 2745 - 2753