文献类型：期刊文献

英文题名：Nanoscale Transport during Liquid Film Thinning Inhibits Bubble Coalescing Behavior in Electrolyte Solutions

作者：Liu, Bo[1,2];Manica, Rogerio[1];Liu, Qingxia[1,3];Xu, Zhenghe[1,4];Klaseboer, Evert[5];Yang, Qiang[2]

机构：[1]Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai, Peoples R China;[3]Shenzhen Technol Univ, Julong Coll, Shenzhen 518118, Peoples R China;[4]Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China;[5]Inst High Performance Comp, 1 Fusionopolis Way, Fusionopolis 138632, Singapore

年份：2023

卷号：131

期号：10

外文期刊名：PHYSICAL REVIEW LETTERS

收录：;EI(收录号：20234014834533);WOS:【SCI-EXPANDED(收录号:WOS:001167714400007)】；

语种：英文

外文关键词：Electrolytes - Flocculation

摘要：The long-standing puzzle of why two colliding bubbles in an electrolyte solution do not coalesce immediately upon contact is resolved. The water film between the bubbles needs to be drained out first before its rupture, i.e., coalescence. Experiments reveal clearly that the film thinning exhibits a rather sudden slowdown (around 30-50 nm), which is orders of magnitude smaller than similar experiments involving surfactants. A critical step in explaining this phenomenon is to realize that the solute concentration is different in bulk and at the surface. During thinning, this will generate an electrolyte concentration difference in film solution along the interacting region, which in turn causes a Marangoni stress to resist film thinning. We develop a film drainage model that explains the experimentally observed phenomena well. The underlying physical mechanism, that confused the scientific community for decades, is now finally revealed.