离子体-溶剂相互作用在PFSA分散中的影响:分散粘度
Melissa Novy1, Denis Duchesne2, Gregg Dahlke2
1Department of Chemistry, Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States.
Macromolecules
|March 2, 2026
概括
在燃料电池应用中, perfluorosulfonic acid (PFSA) 的分散粘度至关重要. 较高的粘度受到PFSA结构和溶剂的影响,影响涂层性能,并与聚合物形态学和离子协会有关.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- perfluorosulfonic acid (PFSA) 离子体分散对于制造燃料电池和水电解剂中的组件至关重要.
- 分散粘度直接影响涂层过程,如湿和平面化,影响整体设备性能.
研究的目的:
- 调查PFSA度,化学结构和溶剂成分如何影响分散粘度.
- 为了将粘度与体形态相关联,并了解潜在的相互作用.
主要方法:
- 检查了五种不同的PFSA和三种二元酒精水溶剂系统 (n-propanol,异醇,乙醇).
- 测量零剪切粘度 (η0) 作为PFSA和溶剂参数的函数.
- 分析了PFSA的体形态和溶剂侧链/骨干相互作用.
主要成果:
- 零剪切粘度 (η0) 随着侧链长度的减少,侧链含量的增加和酒精度的增加而增加.
- 确定了两个粘度依赖于酒精度的模式 (弱和强).
- 高度的酒精导致 η0增加,这是由于聚合物形态和离子联结,与不利的溶剂侧链相互作用有关.
结论:
- 通过PFSA结构和溶剂组成,可以调整PFSA分散粘度.
- 粘度行为是由溶剂侧链和溶剂骨干相互作用的平衡所决定的.
- 粘度依赖的交叉与主导溶剂-PFSA相互作用的转变保持一致.
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