Spontaneous transfer of amphiphilic molecules from evaporating water to involatile oil and its effects on the rate of water evaporation
Spontaneous transfer of amphiphilic molecules from evaporating water to involatile oil and its effects on the rate of water evaporation
复制标题
两亲分子从蒸发水到不挥发油的自发转移及其对水蒸发速率的影响
DOI：
10.1016/j.ijheatmasstransfer.2023.124053
复制
发表时间：
2023
影响因子：
5.2
通讯作者：
Inasawa Susumu
中科院分区：
文献类型：
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作者：
Hasegawa Katsuyuki;Inasawa Susumu
我们研究了水通过两亲分子溶于水相和油相的纠缠油层的蒸发动力学。随着水的蒸发，水相中两亲分子的浓度增加，导致两亲分子自发向油相转移。由于相转移，油相体积增大，导致水蒸发速率降低。然而，水的蒸发通量不能仅仅用油层的厚度来解释，油相中溶解的两亲分子的数量也会影响蒸发通量。我们认为油相中的两亲分子影响了水分子通过油层的运输，因为油相中的两亲分子和水分子之间存在很强的相互作用。一个基于延迟扩散的简单数学模型合理地解释了实验数据。两亲分子的相转移对于理解水在相分离溶液（如乳液）中的蒸发动力学非常重要。讨论了水蒸发动力学和两亲分子的组成，并与平衡态分子进行了比较。
We have investigated the evaporation kinetics of water through an involatile oil layer with amphiphilic molecules dissolved in both the water and oil phases. As water evaporated, the concentration of amphiphilic molecules in the water phase increased, which induced spontaneous transfer of the amphiphilic molecules to the oil phase. The volume of the oil phase increased owing to the phase transfer, which caused a decrease in the rate of water evaporation. However, the evaporation flux of water was not explained by only the thickness of the oil layer, and the amount of dissolved amphiphilic molecules in the oil phase also affected the evaporation flux. We propose that the amphiphilic molecules in the oil phase affected transport of water molecules through the oil layer because there would be a strong interaction between the amphiphilic molecules and water molecules in the oil phase. A simple mathematical model based on retarded diffusion reasonably explained the experimental data. Phase transfer of the amphiphilic molecules is important to understand the evaporation kinetics of water in phase-separated solutions, such as emulsions. The kinetics of water evaporation and the compositions of the amphiphilic molecules compared with those at equilibrium are discussed.