Thermodynamic-kinetic coupling during the evaporation of binary solvents
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更新:2025-09-30 10:45:55
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摘要
SourceURL:file:///home/qtang/Nutstore Files/Nutstore/会议讲座/2025/武汉多相流/Abstract-QiyunTang.docxUnlike single-component solvent, binary solvents offer rich thermodynamic behavior within a diverse parameter space. Their gas-liquid phase transitions, such as evaporation, are widely utilized to modulate soft matter nanostructures. However, traditional evaporation-induced self-assembly primarily focuses on the dynamics within the liquid phase, neglecting the influence of vapor-phase thermodynamics. We constructed a theoretical framework coupling the thermodynamics and kinetics of binary solvents. Calculations reveal that this coupling leads to anomalous liquid expansion during the evaporation of binary solvents. Furthermore, the reduction of pressure in liquid-phase during evaporation can induce the liquid instability, resulting in spontaneous phase separation and bubble formation - a finding corroborated by experimental observations [1]. Additionally, by combining the energy transfer equation with mass transfer equation, we theoretically predict that localized heating can slow down interfacial evaporation kinetics. This challenges the common belief that heating invariably accelerates evaporation. This counter-intuitive phenomenon can be attributed to an anomalous cold-to-hot mass transfer determined by temperature dependence thermodynamics of binary solvents [2]. The related research demonstrates that the complex thermodynamic-kinetic coupling in binary solvents can generate rich phase transition dynamics. This not only deepens our understanding of the energy-kinetics relationship but also holds potential for advancing the application of gas-liquid phase transitions in fields such as wastewater treatment, chemical distillation, and drought prevention.
关键词
evaporation,binary solvents,bubble formation,thermodynamic-kinetic coupling
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