Evaporation-Triggered Segregation of Sessile Binary Droplets

被引：77

作者：

Li, Yaxing ^{[1
,2
]}

Lv, Pengyu ^{[1
,2
]}

Diddens, Christian ^{[1
,2
,3
]}

Tan, Huanshu ^{[1
,2
]}

Wijshoff, Herman ^{[3
,4
]}

Versluis, Michel ^{[1
,2
]}

Lohse, Detlef ^{[1
,2
,5
]}

机构：

[1] Univ Twente, Max Planck Ctr Twente Complex Fluid Dynam, Dept Sci & Technol, Phys Fluids Grp,Mesa Inst, POB 217, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, JM Burgers Ctr Fluid Dynam, POB 217, NL-7500 AE Enschede, Netherlands

[3] Eindhoven Univ Technol, Dept Mech Engn, POB 513, NL-5600 MB Eindhoven, Netherlands

[4] Oce Technol BV, POB 101, NL-5900 MA Venlo, Netherlands

[5] Max Planck Inst Dynam & Self Org, Fassberg 17, D-37077 Gottingen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 22期

关键词：

ANGLE NEUTRON-SCATTERING; AQUEOUS-SOLUTIONS; MULTICOMPONENT DROPLETS; LIQUID-DROPS; STILL AIR; OUZO DROP; NUCLEATION; SURFACE; GROWTH; 1,2-HEXANEDIOL;

D O I：

10.1103/PhysRevLett.120.224501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Droplet evaporation of multicomponent droplets is essential for various physiochemical applications, e.g., in inkjet printing, spray cooling, and microfahrication. In this work, we observe and study the phase segregation of an evaporating sessile binary droplet, consisting of a miscible mixture of water and a surfactantlike liquid (1,2-hexanediol). The phase segregation (i.e., demixing) leads to a reduced water evaporation rate of the droplet, and eventually the evaporation process ceases due to shielding of the water by the nonvolatile 1,2-hexanediol. Visualizations of the flow field by particle image velocimetry and numerical simulations reveal that the timescale of water evaporation at the droplet rim is faster than that of the Marangoni flow, which originates from the surface tension difference between water and 1,2-hexanediol, eventually leading to segregation.

引用

页数：5

共 40 条

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