Experimental study of evaporation of sessile water droplet on PDMS surfaces

作     者：Ying-Song Yu Zi-Qian Wang Ya-Pu Zhao 

作者机构：Department of Engineering MechanicsSchool of Civil Engineering & ArchitectureHubei University of Technology State Key Laboratory of Nonlinear MechanicsInstitute of MechanicsChinese Academy of Sciences 

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

年 卷 期：2013年第29卷第6期

页      面：799-805页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：supported by the National Natural Science Foundation of China(11002051,11072244,and 11372313) the Key Research Program of the Chinese Academy of Sciences(KJZDEW-M01) the Instrument Developing Project of the Chinese Academy of Sciences(Y2010031) 

主　　题：Droplet evaporation PDMS Constant contact radius mode Constant contact angle mode Force- displacement curve Surface deformation Liquid-vapor interfacial tension 

摘      要：Evaporation of sessile water droplet on polydimethylsiloxane （PDMS） surfaces with three different curing ratios （5：1, 10：1, and 20：1） was experimentally investigated in this paper. We show that the constant contact radius （CCR） evaporation on surface with high curing ratio lasts longer than that with low curing ratio. We also measured Young＇s moduli of PDMS films by using atomic force microscopy （AFM） and simulated surface deformation of PDMS films induced by sessile water droplet. With increasing curing ratio of PDMS film, Young＇s modulus of PDMS film is getting lower, and then there will be larger surface deformation and more elastic stored energy. Since such energy acts as a barrier to keep the three-phase contact line pinned, thus it will result in longer CCR evaporation on PDMS surface with higher curing ratio.