来自含有阿姆斯特朗酸的多聚烯的质子导电膜
Andy Künzel-Tenner1, Christoph Kirsch2, Oleksandr Dolynchuk3
1Institut für Chemie, Polymerchemie, Technische Universität Chemnitz, Straße der Nationen 62, 09111 Chemnitz, Germany.
Macromolecules
|February 19, 2024
概括
这项研究引入了1,5-甲脱硫酸,用于制造具有高离子交换能力 (IEC) 的硫化聚烯. 这些材料显示出出色的质子导电性,使它们成为燃料电池应用的前景.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 硫聚烯是燃料电池中质子交换膜 (PEM) 的关键材料.
- 实现高离子交换能力 (IEC) 和质子导电性,同时保持机械和化学稳定性是一个重大挑战.
研究的目的:
- 开发一种高效和经济的方法,用于制备具有高IEC的交替硫聚烯.
- 为了研究使用1,5-甲脱硫酸作为构建块.
- 通过保护/解除保护策略,增强聚合物特性,如可溶性和分子质量.
主要方法:
- 苏苏基聚凝利用1,5-甲脱硫酸和一个全甲甲共同体.
- 对基稳定型新硫酸盐的保护/解除保护策略.
- 基于溶液的去保护和合成聚合物的热交联.
- 使用Fenton的试剂和密度功能理论 (DFT) 计算进行化学稳定性评估.
主要成果:
- 成功合成了具有高IEC (高达2.93 mequiv/g) 和质子导电性 (138 mS/cm) 的交替硫聚烯.
- 证明一个全元甲基共纳体对于达到高摩尔质量至关重要.
- 热交叉连接有效控制了水吸收 (至50重 %),同时保持了良好的IEC (2.33 mequiv/g) 和导电性 (85 mS/cm).
- DFT的计算表明,1,5-脱硫烯单元的化学稳定性很高,可以抵抗脱硫.
结论:
- 1,5-纳二硫酸是高性能硫聚烯的可行和成本有效的单体.
- 开发的聚合物膜对PEM应用具有有前途的性能,平衡导电性,IEC和稳定性.
- 进一步优化交叉连接对于在水环境中的实际应用至关重要.
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