Thinning air-water films stabilized by bacterial particles

作     者：Song Wu Yuehua Yang Hongyuan Jiang Song Wu;Yuehua Yang;Hongyuan Jiang

作者机构：Hefei National Laboratory for Physical Science at the MicroscaleCAS Key Laboratory of Mechanical Behavior and Design of MaterialsDepartment of Modern MechanicsCAS Center for Excellence in Complex System MechanicsUniversity of Science and Technology of ChinaHefei230026China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2021年第37卷第1期

页      面：27-34,I0001页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grants 11872357,11622222,and 12002338) the Fundamental Research Funds for the Central Universities,the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant XDB22040403) the Thousand Young Talents Program of China,the National Postdoctoral Program for Innovative Talents(Grant BX20190318) the China Postdoctoral Science Foundation(Grant 2019M662188) the Fundamental Research Funds for the Central Universities(Grant WK2090000017) the USTC Research Funds of the Double First-Class Initiative(Grant YD2480002001) the Anhui Provincial Natural Science Foundation(Grant 2008085QA24) 

主　　题：Bacterial concentration Evaporation dynamics Film stability Lateral capillary force 

摘      要：The ability of particles to stabilize liquid films has broad applications in many fields,such as drug delivery,biofuel catalysis,and crude-oil *** mechanism of particles to stabilize emulsions has been widely ***,how particles affect the stability of suspension films is still ***,the dynamics of bacterial particles on free liquid films during evaporation is obtained by direct microscopic *** find that the initial concentration of the bacterial solution affects the evolution of the shapes and stabilities of liquid *** 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 ***,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 *** 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 ***,our research reveals the critical role of bacteria concentration in stabilizing suspension liquid film.