Document Type
Article
Publication Date
11-16-2022
Department
Department of Materials Science and Engineering
Abstract
A contact angle observed for a liquid–solid system is not necessarily a unique value, and a few contact angles need to be considered carefully in relation to liquid spreading, adhesion and phase separation. Understanding of the significance of different contact angles has improved in the last few years through direct measurements of interactive forces between droplets/bubbles and solids together with the simultaneous visualization of the changes in their shapes. A microelectronic balance system is employed to measure the force of spreading after either liquid droplet or gas bubble attachment to a substrate surface and the droplet/bubble–substrate adhesion forces after droplet/bubble compression, retraction and detachment. Equipped with a camera in flank and data-acquisition software, the instrument measures directly the forces, monitors droplet/bubble–surface separation with respect to distances over which the droplet/bubble stretches and collects optical images simultaneously. The images are used to analyze capillary pressure and surface tension forces based on the measured droplet/bubble dimensions, shapes of surfaces and values of contact angles. These measurements allow researchers to correlate the advancing, receding and most stable contact angles with liquid–solid interactive forces and analyze their scientific meaning. This review summarizes the very recent literature reports on measurements and interpretation of liquid droplet/gas bubble interactive forces and associated contact angles.
Publication Title
Surface Innovations
Recommended Citation
Jiang, Y.,
&
Drelich, J.
(2022).
Fluid droplet spreading and adhesion studied with a microbalance: a review.
Surface Innovations.
http://doi.org/10.1680/jsuin.22.01050
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/17294
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Version
Publisher's PDF
Publisher's Statement
Copyright 2022. Published with permission by the ICE under the CC-BY 4.0 license. Publisher’s version of record: https://doi.org/10.1680/jsuin.22.01050