https://scholars.lib.ntu.edu.tw/handle/123456789/630166
標題: | Atypical wetting behavior of binary mixtures of partial and total wetting liquids: leak-out phenomena | 作者: | Nuthalapati, Karthik YU-JANE SHENG Tsao, Heng Kwong |
關鍵字: | Binary liquid mixture | CA plateau regime | Leak-out phenomenon | Noncontact repulsion | Precursor film | Wetting behavior | 公開日期: | 5-六月-2023 | 卷: | 666 | 來源出版物: | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 摘要: | The wetting behavior of simple binary mixtures containing both partial and total wetting liquids is investigated on the commonly used substrates. The variation of the contact angle (CA) of the binary liquid with the composition (xP) on different solid surfaces is obtained. It is interesting to find that for the droplet which can exhibit self-propulsion, four different regimes can be identified in the CA-xP plot. Among them, the plateau regime where the CA remains a constant value in a certain concentration range is most intriguing. In contrast, for the droplet which cannot self-propel, the CA grows monotonously with the concentration of the partial wetting liquid. The leak-out phenomenon in which the droplet is surrounded by the precursor film is believed to occur in the plateau regime, and it is examined by observing the encounter of two miscible droplets by optical microscopy. The apparently noncontact repulsion between the moving and static droplets reveals the presence of the precursor film leaked out from the self-propelled droplet. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/630166 | ISSN: | 09277757 | DOI: | 10.1016/j.colsurfa.2023.131299 |
顯示於: | 化學工程學系 |
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