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首页> 外文期刊>Journal of Applied Polymer Science >Spontaneous Spreading of Emulsions on Solid surfaces: Morphology and Dynamics
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Spontaneous Spreading of Emulsions on Solid surfaces: Morphology and Dynamics

机译：乳状液在固体表面上的自发扩散：形态和动力学

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摘要

The spontaneous spreading of emulsions of water dispersed in silicone oil onto glass surfaces is examined using differential interference contrast (DIC) micros- copy. Spreading occurs via a precursor film from which the emulsion droplets are excluded. The radius of the interline of the bulk drop is found to vary as (time)1/10, as is commonly observed for the spontaneous spreading of pure liquids. The spreading rate constant decreases linearly with the volume percent of the dispersed phase, but drops suddenly to zero at approximately 73% dispersed phase. The width and spreading rate of the precursor film also is found to decrease with dispersed phase concentration. A fingering type of instability is evident at the leading edge of the precursor film, yet has little effect on the spreading rate of either the precursor film or the droplet interline.
机译：使用微分干涉对比（DIC）显微镜检查分散在硅油中的水乳液在玻璃表面上的自发扩散。扩散通过前驱膜发生，从该前驱膜中排除了乳滴。发现散装液滴的中间线的半径变化为（时间）1/10，如通常在纯液体的自发扩散中观察到的那样。扩散速率常数随分散相的体积百分比线性降低，但在约73％的分散相下突然降至零。还发现前体膜的宽度和铺展速率随分散相浓度而降低。在前体膜的前缘处明显出现了指状类型的不稳定性，但对前体膜或液滴界面的扩散速率几乎没有影响。

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