Quasi-static motion of microparticles at the depinning contact line of an evaporating droplet on PDMS surface | |
Yu YS(余迎松); Xia XL; Zheng X(郑旭); Huang XF(黄先富); Zhou JZ; Yu, YS (reprint author), Hubei Univ Technol, Sch Civil Architecture & Environm, Dept Mech, Wuhan 430068, Hubei, Peoples R China. | |
发表期刊 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY |
2017-09-01 | |
卷号 | 60期号:9页码:Ar094612 |
ISSN | 1674-7348 |
摘要 | In this paper, evaporation of sessile water droplets containing fluorescent polystyrene (PS) microparticles on polydimethylsiloxane (PDMS) surfaces with different curing ratios was studied experimentally using laser confocal microscopy. At the beginning, there were some microparticles located at the contact line and some microparticles moved towards the line. Due to contact angle hysteresis, at first both the contact line and the microparticles were pinned. With the depinning contact line, the microparticles moved together spontaneously. Using the software ImageJ, the location of contact lines at different time were acquired and the circle centers and radii of the contact lines were obtained via the least square method. Then the average distance of two neighbor contact lines at a certain time interval was obtained to characterize the motion of the contact line. Fitting the distance-time curve at the depinning contact line stage with polynomials and differentiating the polynomials with time, we obtained the velocity and acceleration of both the contact line and the microparticles located at the line. The velocity and the maximum acceleration were, respectively, of the orders of 1 mu m/s and 20-200 nm/s(2), indicating that the motion of the microparticles located at the depinning contact line was quasi-static. Finally, we presented a theoretical model to describe the quasi-static process, which may help in understanding both self-pinning and depinning of microparticles. |
关键词 | Droplet Evaporation Pdms Contact Line Van Der Waals Force Electrostatic Force Drag Force Capillary Force |
DOI | 10.1007/s11433-017-9060-3 |
URL | 查看原文 |
收录类别 | SCI ; EI ; CSCD |
语种 | 英语 |
WOS记录号 | WOS:000406283000006 |
关键词[WOS] | Sessile Water Droplet ; Soft Surfaces ; Particle ; Suppression ; Deposition ; Polymers ; Stains ; Flow |
WOS研究方向 | Physics |
WOS类目 | Physics, Multidisciplinary |
项目资助者 | National Natural Science Foundation of China(11572114 ; Opening Fund of State Key Laboratory of Nonlinear Mechanics (LNM) ; CAS Strategic Priority Research Program(XDB22040403) ; CAS Key Research Program of Frontier Sciences(QYZDJ-SSW-JSC019) ; 11572335 ; U1562105) |
课题组名称 | LNM纳/微系统力学与物理力学 |
论文分区 | 二类/q1 |
力学所作者排名 | 3 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/70022 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Yu, YS (reprint author), Hubei Univ Technol, Sch Civil Architecture & Environm, Dept Mech, Wuhan 430068, Hubei, Peoples R China. |
推荐引用方式 GB/T 7714 | Yu YS,Xia XL,Zheng X,et al. Quasi-static motion of microparticles at the depinning contact line of an evaporating droplet on PDMS surface[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2017,60,9,:Ar094612. |
APA | Yu YS,Xia XL,Zheng X,Huang XF,Zhou JZ,&Yu, YS .(2017).Quasi-static motion of microparticles at the depinning contact line of an evaporating droplet on PDMS surface.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,60(9),Ar094612. |
MLA | Yu YS,et al."Quasi-static motion of microparticles at the depinning contact line of an evaporating droplet on PDMS surface".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 60.9(2017):Ar094612. |
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