Associate professor
Supervisor of Master's Candidates
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DOI number:10.1007/s10409-020-01031-5
Journal:Acta Mechanica Sinica
Abstract:The ability of particles to stabilize liquid films has broad applications in many fields, such as drug delivery, biofuel catalysis, and crude-oil separation. The mechanism of particles to stabilize emulsions has been widely studied. However, how particles affect the stability of suspension films is still unclear. Here, the dynamics of bacterial particles on free liquid films during evaporation is obtained by direct microscopic observation. We find that the initial concentration of the bacterial solution affects the evolution of the shapes and stabilities of liquid films. The liquid film with a low bacterial concentration exhibits a drainage and rupture process similar to pure water, and bacteria would be evacuated during the evaporation of liquid film. However, when the bacterial concentration is high, bacteria form a single-layer array in the center of the film and greatly enhance the stability of the liquid film. We demonstrate that these two distinct film evaporation dynamics are caused by the difference in the lateral capillary force of the particles at different positions on the liquid film, which is not affected by the active motility of particle. Together, our research reveals the critical role of bacteria concentration in stabilizing suspension liquid film.
First Author:Song Wu
Indexed by:Journal paper
Correspondence Author:Yuehua Yang,Hongyuan Jiang
Volume:37
Issue:1
Page Number:27-34
ISSN No.:0567-7718
Translation or Not:no
Date of Publication:2021-01-13
Included Journals:SCI
Links to published journals:http://link.springer.com/10.1007/s10409-020-01031-5
