Preparation and characterization of proton exchange membranes based onsulfonated poly(ether ether ketone) doped with phosphorylated mesoporoussilica submicrospheres

doi:10.11949/j.issn.0438-1157.20150520

Abstract

Abstract:

Two kinds of phosphorylated mesoporous silica submicrospheres were prepared. The phosphoric acid groups ( PO₃H₂) were grafted either only on the particle outer surface (PMPS-Ⅰ) or on both the outer surface and the inner pore walls (PMPS-Ⅱ). All the submicrospheres exhibited a uniform particle size and possessed well-aligned one-dimensional hexahedral pores. Hybrid membranes were fabricated by directly blending silica with the sulfonated poly(ether ether ketone) (SPEEK) solutions. The hybrid membranes doped with PMPS-Ⅱ exhibited higher proton conductivity compared to the ones with PMPS-Ⅰ. The highest proton conductivity was 0.241 S·cm^-1 at 60℃ and 100% relative humidity (RH) for the hybrid membrane with 5% (mass) of PMPS-Ⅱ. The experimental results indicated that continuous proton conduction channels were advantageous for the enhancement of proton conductivity of the hybrid membranes.

Key words: fuel cell, membrane, proton conductivity, methanol permeability, phosphorylated, silica

摘要：

制备了两种磷酸化改性的介孔二氧化硅亚微米球形颗粒,分别为仅外表面接枝磷酸根基团的颗粒(PMPS-Ⅰ)和内外表面均接枝磷酸根基团的颗粒(PMPS-Ⅱ)。颗粒具有均一的尺寸和规则排布的六面体一维贯通孔道。将制备的二氧化硅颗粒与磺化聚醚醚酮(SPEEK)溶液共混制备杂化膜。与填充PMPS-Ⅰ的杂化膜相比,填充PMPS-Ⅱ的杂化膜显示出较好的质子传导性能。当PMPS-Ⅱ的填充量为5%(质量)时,杂化膜在60℃、100%相对湿度下最高质子传导率为0.241 S·cm^-1。研究结果表明,连续贯通的质子传递通道有助于提高杂化膜的质子传导率。

关键词: 燃料电池, 膜, 质子传导率, 甲醇渗透率, 磷酸化, 二氧化硅

CLC Number:

TM911.4

WU Hong, YANG Hao, ZHAO Yuning, LI Zhen, JIANG Zhongyi. Preparation and characterization of proton exchange membranes based onsulfonated poly(ether ether ketone) doped with phosphorylated mesoporoussilica submicrospheres[J]. CIESC Journal, 2016, 67(1): 358-367.

吴洪, 杨昊, 赵宇宁, 李震, 姜忠义. 磷酸化二氧化硅填充磺化聚醚醚酮质子交换膜的制备及表征[J]. 化工学报, 2016, 67(1): 358-367.

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