结构不同的三级胺对四级化离子交换膜的特性的影响 潜在适用于水电解
Andrea Roggi1, Gabriele Agonigi2, Claudio Resta2
1Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, Pisa, 56126, Italy.
Macromolecular rapid communications
|February 27, 2024
概括
与N-methylpiperidine (N-MPip) 相比,trimethylamine (TMA) 功能化的膜显示了增强的电化学性能. 一种TMA/PMDETA混合物在接种共聚合物中提供高导电性和减少水吸收.
科学领域:
- 聚合物科学 聚合物科学
- 材料化学 材料化学
- 电化学 电化学 电化学
背景情况:
- 基于 styrene-butadiene 块共聚合物 (SB) 的移植共聚合物提供机械强度.
- 使用乙烯基化 (VBC) 的功能化创建了可用于进一步修改的反应部位.
- 氨基化是在聚合物膜中引入功能组的关键步骤.
研究的目的:
- 用不同的单胺和多胺来研究g-VBC-15移植共聚合物的氨化.
- 评估产生的膜的电化学和机械性能.
- 通过调节氨基功能来优化膜性能.
主要方法:
- 溶液自由基聚合合成g-VBC-15移植共聚合物.
- 移植共聚合物与三甲基胺 (TMA) 和N-methylpiperidine (N-MPip) 的氨化.
- 使用TMA与四甲基-1,3-propanediamine (TMPDA) 或N,N,N',N'',N''-pentamethyldiethylenetriamine (PMDETA) 的混合氨基化剂的制备.
- 包括热,机械和电化学测试在内的广泛表征.
主要成果:
- 与N-MPip对应物相比,TMA四元化膜表现出优越的电化学性能.
- 用TMA/PMDETA混合物 (90:10摩尔比) 氨基化膜显示出最高的导电性.
- TMA/PMDETA膜的机械和电化学性能与仅使用TMA的膜相似.
- 在用TMA/PMDETA混合物四重化膜中观察到水吸收的显著减少.
结论:
- 三甲基胺是g-VBC-15移植共聚合物的氨化首选的单胺,可提高电化学性能.
- 将TMA与PMDETA混合,可以调节膜功能,从而提高导电性和减少吸水量.
- 开发的膜对要求高电化学性能和可控吸水的应用具有前景.
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