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The influence of solid-liquid interactions on dynamic wetting.

T D Blake1, Coninck J De

  • 1Research and Development, Kodak Limited, Harrow, Middlesex, UK. terryblake@kodak.com

Advances in Colloid and Interface Science
|March 23, 2002
PubMed
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The molecular-kinetic theory of dynamic wetting was extended to include solid-liquid interactions. This reveals that optimal wetting rates occur at intermediate interaction strengths, impacting processes like coating.

Area of Science:

  • Physical Chemistry
  • Surface Science
  • Materials Science

Background:

  • Dynamic wetting describes liquid spreading on solid surfaces.
  • Solid-liquid interactions are crucial but complex factors in wetting phenomena.
  • Existing theories often simplify or neglect the nuanced effects of these interactions.

Purpose of the Study:

  • To extend the molecular-kinetic theory of dynamic wetting.
  • To incorporate the specific effects of solid-liquid interactions.
  • To understand how these interactions influence wetting dynamics.

Main Methods:

  • Equating work of adhesion with surface activation free energy.
  • Deriving new equations to model solid-liquid interaction effects.
  • Analyzing the interplay between driving force and resistance to wetting.

Related Experiment Videos

Main Results:

  • Solid-liquid interactions modify both the driving force and resistance to wetting.
  • Strong interactions increase both driving force and resistance.
  • Weak interactions decrease both driving force and resistance.

Conclusions:

  • The interplay of opposing effects leads to a maximum wetting rate at intermediate interactions.
  • These findings are supported by experimental and molecular dynamics data.
  • The results have significant implications for coating and other wetting-dependent processes.