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Wetting-dewetting films: the role of structural forces
1Illinois Institute of Technology, Dept. of Chemical Engineering, Chicago, IL 60616, USA.
Advances in Colloid and Interface Science
|September 17, 2013
Summary
Liquid wetting and dewetting phenomena on solid surfaces are complex due to surface energy dynamics. This review clarifies mechanisms, stability criteria, and applications for hydrophilic and hydrophobic substrates, including nanofilms.
Area of Science:
- Surface Science
- Materials Science
- Fluid Dynamics
Background:
- Liquid wetting and dewetting are common but not fully understood phenomena.
- Surface energy non-ideality and dynamics complicate these processes.
- Understanding these phenomena is crucial for technological advancements.
Purpose of the Study:
- To illustrate mechanisms and applications of liquid wetting and dewetting.
- To discuss stability criteria using the Frumkin-Derjaguin disjoining pressure model.
- To explore nanofilm wetting and dewetting mechanisms.
Main Methods:
- Review of classical understanding and film stability criteria.
- Analysis of disjoining pressure isotherms and critical film thickness.
- Discussion of de Vries and Vrij-Scheludko instability mechanisms.
- Examination of nanoparticle behavior in wetting films.
Main Results:
- Elucidation of film critical thickness and capillary pressure roles in instability.
- Criteria for stable and unstable wet films are presented.
- Nanoparticle-induced 2D layer formation in wetting films is discussed.
Conclusions:
- The review provides insights into wetting-dewetting phenomena.
- It aids in understanding stability criteria and instability mechanisms.
- It supports the development of novel technologies based on wetting-dewetting principles.
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