Droplet Spreading and Adhesion on Spherical Surfaces

Zhanglei Zhu; Youhua Jiang; Jaroslaw W Drelich

doi:10.1021/acs.langmuir.2c01053

Droplet Spreading and Adhesion on Spherical Surfaces

Zhanglei Zhu, Youhua Jiang^*, Jaroslaw W Drelich^*

^*Corresponding author for this work

Mechanical Engineering (Robotics)

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Adhesion of a liquid droplet to a solid surface is a result of solid surface interactions with surrounding fluids, affected by its wettability and morphology. Unfortunately, the direct measurements of adhesion forces are rarely reported in the scientific literature, especially for solids with curvatures. In this study, by using a high-sensitivity microelectronic mechanical balance which vertically deposits and then pulls liquid droplets, the spreading and adhesion forces for water and ethylene glycol droplets on spherical surfaces of polyethylene terephthalate (PET) with radii of curvature from 2 to 8 mm were recorded. Results show that the surface curvature does not affect the advancing and most-stable contact angles but affects the extent of spreading and maximum adhesion forces. The solid surface curvature affects both surface tension and Laplace pressure forces at the spreading point, whereas it mainly affects the Laplace pressure force at the maximum adhesion point.

Original language	English
Pages (from-to)	8456-8461
Number of pages	6
Journal	Langmuir
Volume	38
Issue number	27
DOIs	https://doi.org/10.1021/acs.langmuir.2c01053
State	Published - 12 Jul 2022

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title = "Droplet Spreading and Adhesion on Spherical Surfaces",

abstract = "Adhesion of a liquid droplet to a solid surface is a result of solid surface interactions with surrounding fluids, affected by its wettability and morphology. Unfortunately, the direct measurements of adhesion forces are rarely reported in the scientific literature, especially for solids with curvatures. In this study, by using a high-sensitivity microelectronic mechanical balance which vertically deposits and then pulls liquid droplets, the spreading and adhesion forces for water and ethylene glycol droplets on spherical surfaces of polyethylene terephthalate (PET) with radii of curvature from 2 to 8 mm were recorded. Results show that the surface curvature does not affect the advancing and most-stable contact angles but affects the extent of spreading and maximum adhesion forces. The solid surface curvature affects both surface tension and Laplace pressure forces at the spreading point, whereas it mainly affects the Laplace pressure force at the maximum adhesion point.",

author = "Zhanglei Zhu and Youhua Jiang and Drelich, {Jaroslaw W}",

year = "2022",

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TY - JOUR

T1 - Droplet Spreading and Adhesion on Spherical Surfaces

AU - Zhu, Zhanglei

AU - Jiang, Youhua

AU - Drelich, Jaroslaw W

PY - 2022/7/12

Y1 - 2022/7/12

N2 - Adhesion of a liquid droplet to a solid surface is a result of solid surface interactions with surrounding fluids, affected by its wettability and morphology. Unfortunately, the direct measurements of adhesion forces are rarely reported in the scientific literature, especially for solids with curvatures. In this study, by using a high-sensitivity microelectronic mechanical balance which vertically deposits and then pulls liquid droplets, the spreading and adhesion forces for water and ethylene glycol droplets on spherical surfaces of polyethylene terephthalate (PET) with radii of curvature from 2 to 8 mm were recorded. Results show that the surface curvature does not affect the advancing and most-stable contact angles but affects the extent of spreading and maximum adhesion forces. The solid surface curvature affects both surface tension and Laplace pressure forces at the spreading point, whereas it mainly affects the Laplace pressure force at the maximum adhesion point.

AB - Adhesion of a liquid droplet to a solid surface is a result of solid surface interactions with surrounding fluids, affected by its wettability and morphology. Unfortunately, the direct measurements of adhesion forces are rarely reported in the scientific literature, especially for solids with curvatures. In this study, by using a high-sensitivity microelectronic mechanical balance which vertically deposits and then pulls liquid droplets, the spreading and adhesion forces for water and ethylene glycol droplets on spherical surfaces of polyethylene terephthalate (PET) with radii of curvature from 2 to 8 mm were recorded. Results show that the surface curvature does not affect the advancing and most-stable contact angles but affects the extent of spreading and maximum adhesion forces. The solid surface curvature affects both surface tension and Laplace pressure forces at the spreading point, whereas it mainly affects the Laplace pressure force at the maximum adhesion point.

U2 - 10.1021/acs.langmuir.2c01053

DO - 10.1021/acs.langmuir.2c01053

M3 - 文章

C2 - 35767433

SN - 0743-7463

VL - 38

SP - 8456

EP - 8461

JO - Langmuir

JF - Langmuir

IS - 27

ER -

Droplet Spreading and Adhesion on Spherical Surfaces

Abstract

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