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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical responses in the length direction and thickness direction of quaternary 1,4-diazabicyclo-[2.2.2]-octane polysulfone alkaline anion-exchange fuel-cell membranes
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Mechanical responses in the length direction and thickness direction of quaternary 1,4-diazabicyclo-[2.2.2]-octane polysulfone alkaline anion-exchange fuel-cell membranes

机译：季度1,4-二氮杂双环 - [2.2.2] - 辛烷聚砜碱性阴离子交换燃料 - 细胞膜的长度方向和厚度方向的机械响应

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摘要

A quaternary 1,4-diazabicyclo-[2.2.2]-octane polysulfone (QDPSU) alkaline anion-exchange fuel-cell membrane was synthesized. Nanoindentation and uniaxial tension methods were used to test the mechanical properties of this membrane in both the thickness direction and length direction at 26 degrees C and 40% relative humidity. We found that the QDPSU membrane exhibited remarkable viscoelastic properties with significant loading rate-dependent behavior and time-dependent behavior (creep-relaxation). The value of compression creep rates and compression relaxation rates of the QDPSU membrane were measured to be about 0.2 by a spherical indenter and changed very little with different holding loads. Compared with Nafion, a most widely used fuel-cell membrane, the QDPSU alkaline anion-exchange membrane showed a better creep resistance. During the nanoindentation fatigue test, the variation of depths with the indentation cycles were divided into a rising primary region, a steady-state secondary region, and a continuous declining region. This was different from the uniaxial tension fatigue test. The cross-scale and cross-direction mechanical study from this work will help provide new evidence for bridging the gap between nanoindentation and uniaxial tensile testing. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47696.
机译：合成季铵1,4-二氮杂双环 - [2.2.2] -2.2] - 辛烷聚砜（QDPSU）碱性阴离子交换燃料 - 细胞膜。纳米狭窄和单轴张力方法用于在26℃和40％相对湿度下在厚度方向和长度方向上测试该膜的机械性能。我们发现QDPSU膜表现出显着的粘弹性，具有显着的负载率依赖性行为和时间依赖性行为（蠕变 - 松弛）。测量QDPSU膜的压缩蠕变速率和压缩弛豫速率的值由球形压痕测量为约0.2，并且用不同的保持载荷变化很少。与Nafion相比，最广泛使用的燃料电池膜，QDPSU碱性阴离子交换膜显示出更好的抗蠕变性。在纳米抑制疲劳试验期间，将压痕循环的深度的变化分成上升的主区域，稳态次级区域和连续下降区域。这与单轴张力疲劳试验不同。这项工作的跨尺度和交叉机械研究将有助于弥合纳米茚和单轴拉伸试验之间的差距提供新的证据。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47696。

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  • 来源
    《Journal of Applied Polymer Science》 |2019年第26期|共10页
  • 作者

    Zhang Zhennan; Su Huiyu; Tian Chenyao; Qi Rongrong; Wang Xu; Xia Re;

  • 作者单位

    Wuhan Univ Key Lab Hydraul Machinery Transients Minist Educ Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Sch Resource &

    Environm Sci Hubei Int Sci &

    Technol Cooperat Base Sustainable Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Key Lab Hydraul Machinery Transients Minist Educ Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Sch Resource &

    Environm Sci Hubei Int Sci &

    Technol Cooperat Base Sustainable Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Sch Resource &

    Environm Sci Hubei Int Sci &

    Technol Cooperat Base Sustainable Wuhan 430072 Hubei Peoples R China;

    Wuhan Univ Key Lab Hydraul Machinery Transients Minist Educ Wuhan 430072 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    batteries and fuel cells; membranes; viscosity and viscoelasticity;

    机译：电池和燃料电池;膜;粘度和粘弹性;

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