CO2-philicity to CO2-phobicity 在光滑和随机粗的Cu类基板表面上的过渡
Yuming Yin1, Lingling Zhao1, Shangchao Lin2
1National Engineering Research Center of Turbo-Generator Vibration, School of Energy and Environment, Southeast University, Nanjing, Jiangsu 210096, China.
Langmuir : the ACS journal of surfaces and colloids
|December 1, 2023
概括
了解二氧化碳 (CO2) 在金属表面上的可湿性,是二氧化碳液化过程的关键. 表面的粗程度显著影响二氧化碳滴的行为,使得水友表面变成水的表面.
科学领域:
- 表面科学与工程 表面科学与工程
- 计算材料科学科学 计算材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 在金属基板上的二氧化碳 (CO2) 湿透性对于高效的二氧化碳液化和运输至关重要.
- 目前对二氧化碳湿度的理解和操纵,特别是基础机制,仍然不完整.
- 控制表面特性对于管理二氧化碳与材料的相互作用至关重要.
研究的目的:
- 为了研究CO2在光滑和粗的金属 (状) 基板表面上的湿特性.
- 阐明表面地形和二氧化碳固体相互作用能量对二氧化碳湿度的影响.
- 分析不同粗度的表面上二氧化碳滴滴行为背后的机制.
主要方法:
- 利用分子动力学模拟来模拟不同基板表面的二氧化碳滴滴行为.
- 研究的表面具有不同程度的纳米级粗度 (随机粗) 和光滑的表面.
- 分析了CO2固体特征相互作用能量对表面接触角 (CA) 的影响.
主要成果:
- 在光滑的表面上,二氧化碳滴的明显接触角从180°降至0°,随着二氧化碳固体相互作用能量的增加.
- 表面粗性显著增加了二氧化碳滴接触角度,无论表面的内在湿透性如何.
- 由于表面度,三相接触线上的毛细血管干燥效应被确定为一个关键机制.
结论:
- 纳米级表面地形学在确定二氧化碳的湿透性方面发挥着至关重要的作用,可能会逆转表面特性.
- 表面粗度的增加可以将本质上的CO2爱好表面转变为对CO2恐惧的表面.
- 结果为设计功能化表面提供了洞察力,以精确控制工业应用中的CO2可湿度.
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