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探索聚二甲基氧化涂层策略,以提高碳状多孔介质的液体排斥力
Mert Can Erer1, Emre Burak Boz1, Antoni Forner-Cuenca1
1Electrochemical Materials and Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
ACS applied materials & interfaces
|February 2, 2026
概括
聚甲基 (PDMS) 提供了一个可持续的,无替代PTFE用于电化学设备中的疏水性多孔介质. 电植入PDMS提供了耐用,均的涂层,可以抵抗液体泛滥,优于其他应用方法.
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
- 表面工程是什么?表面工程是什么?
背景情况:
- 碳质多孔扩散介质对于燃料电池和二氧化碳电解剂等电化学技术至关重要.
- 传统的防水剂使用聚四乙烯 (PTFE) 分散剂,面临着对均性,性能和环境问题的挑战.
- 在PTFE中使用的和多基化合物 (PFAS) 由于持久性和毒性而受到监管审查.
研究的目的:
- 研究聚二甲基 (PDMS) 作为一种无,无害环境的替代物,用于疏水化碳质多孔介质.
- 评估不同PDMS涂层应用策略的有效性,以控制可湿性和确保长期稳定性.
- 为工程湿化行为和电化学应用中的涂层稳定性提供指导方针.
主要方法:
- 评估了四种PDMS涂层方法:浸泡涂层,蒸汽沉积 (在O2和N2大气中) 和氨基功能化衍生物的电移植.
- 表面特征包括光谱,显微镜和湿度测量 (例如接触角度).
- 电化学双层电容量测量和液体流量测试 (使用乙醇-KOH溶液) 评估了性能和耐用性.
主要成果:
- 在O2中蒸汽沉积产生了超疏水的表面,但由于粘合力差和基板氧化,导致洪水.
- 电移植和N2蒸汽沉积产生了统一的,薄的PDMS涂层,其防水性与PTFE相似.
- 浸涂样本显示厚厚,不均的层,液体透阻力差;N2蒸汽沉积涂层随着时间的推移而降解,而电移植PDMS显示出优越的耐用性和稳定性.
结论:
- PDMS的电移植提供了一种有希望的,稳定的,无的方法,用于疏水碳酸多孔介质,这对于电化学设备的长期运行至关重要.
- 与物理吸附层相比,对连续的排斥性和防止电极泛滥而言,共振附着的涂层是必不可少的.
- 基于PDMS的涂料代表了对PFAS的可持续替代品,电植入为提高性能和耐用性提供了实用的途径.
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