液体-液体相分离是由蒸汽转移诱导的,在蒸发式二进制液滴中
Ahmed M Othman1, Andreas S Poulos2, Ophelie Torres2
1Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Dr, Cambridge CB3 0AS, U.K.
Langmuir : the ACS journal of surfaces and colloids
|September 7, 2023
概括
干燥乙醇-八甲基三氧液滴显示由于水蒸气的相分离,导致微滴破裂. 控制湿度可以防止这种情况,影响滴水的流动性和蒸发速度.
科学领域:
- 物理化学 物理化学
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
背景情况:
- 二元混合物的滴在各种工业应用中至关重要.
- 了解它们的蒸发动态,特别是相位分离,是控制过程的关键.
研究的目的:
- 为了研究乙醇和八甲基三二氧化二元滴的干燥行为.
- 阐明相位分离的机制及其对液滴动态和蒸发的影响.
主要方法:
- 在高能表面上干燥的静态滴滴的实验观测.
- 测量质量损失以量化蒸发速度.
- 开发和应用一个修改的扩散限制模型.
主要成果:
- 观察到液-液相分离导致微滴形成和破裂.
- 阶段分离归因于水蒸气转移,形成三元混合物.
- 发现湿度控制可以减轻或消除相位分离.
- 复杂的湿行为和在相隔过程中增强的蒸发率.
结论:
- 阶段分离显著影响滴水的蒸发,流动性和湿.
- 经过修改的扩散模型可以准确地预测蒸发速度,考虑到生理化学变化.
- 这些发现有助于更好地理解多元件蒸发,湿和相位分离的相互作用.
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