Dong, Teng;
Kotsi, Kristo;
Xu, Teke;
Kobayashi, Takeshi;
Moriarty, Alexander;
Angeli, Panagiota;
Mcrobbie, Ian;
(2024)
Flowerlike Spreading of Micellar Films during Emulsion Drop Evaporation.
Physical Review Letters
, 133
(17)
, Article 174001. 10.1103/PhysRevLett.133.174001.
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Abstract
We investigated the film spreading during the evaporation of submillimeter oil-in-water emulsion droplets on a solid surface, and observed a novel phenomenon where the film follows a two-layer spreading. In combination with the instability at the film front, the spreading front acquires a flowerlike pattern. The emergence of the two-layer structure is attributed to micelles within the oil film that yield an oscillating disjoining pressure. By considering both the slipping condition and the disjoining pressure, a scaling analysis is carried out that agrees well with the observed film spreading dynamics. The film spreading follows Tanner's law initially, while it becomes faster at a later stage, where the film radius follows r∼t1/2 for weak slip and r∼t3/8 for strong slip conditions.
| Type: | Article |
|---|---|
| Title: | Flowerlike Spreading of Micellar Films during Emulsion Drop Evaporation |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.133.174001 |
| Publisher version: | https://doi.org/10.1103/physrevlett.133.174001 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, DISJOINING PRESSURE, LIQUID, OIL, DYNAMICS, DRIVEN, INSTABILITIES, SURFACES, SUPPRESSION, PRECURSOR, DEPLETION |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Engineering Science Faculty Office |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10204219 |
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