Difference between revisions of "Wetting"

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(Introduction)
(Introduction)
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==Introduction==
 
==Introduction==
Wetting refers to how well or poorly a liquid contacts a surface.  Usually the term applies to water, where if a surface is [[hydrophobic]] it will not wet well while if it is [[hydrophilic]] it will wet well.  The relative [[hydrophobicity]] or [[hydrophilicity]] of a substrate can be determined by measuring the [[contact angle]] of water with the surface.  A liquid wets a surface better if it has a low [[contact angle]] with that surface.
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Wetting refers to how well or poorly a liquid contacts a surface.  Usually the term applies to water, where if a surface is [[hydrophobic]] it will not wet well while if it is [[hydrophilic]] it will wet well.  The relative [[hydrophobicity]] or [[hydrophilicity]] of a substrate can be determined by measuring the [[contact angle]] of water with the surface.  A liquid wets a surface better if it has a low [[contact angle]] with that surface. In general, if the contact angle is lower than 90 degrees, the liquid is considered to be wetting for that surface; while, if the contact angle is greater than 90 degrees, the liquid is non-wetting for the surface.
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[[Image:wetting.png]]
  
 
See also:
 
See also:

Revision as of 15:34, 7 December 2011

Chosen by Grant England

Introduction

Wetting refers to how well or poorly a liquid contacts a surface. Usually the term applies to water, where if a surface is hydrophobic it will not wet well while if it is hydrophilic it will wet well. The relative hydrophobicity or hydrophilicity of a substrate can be determined by measuring the contact angle of water with the surface. A liquid wets a surface better if it has a low contact angle with that surface. In general, if the contact angle is lower than 90 degrees, the liquid is considered to be wetting for that surface; while, if the contact angle is greater than 90 degrees, the liquid is non-wetting for the surface.

Wetting.png

See also:

Wetting from Lectures for AP225.

Wikipedia Article

Cassie and Wenzel States

Keyword in references:

Controlled switching of the wetting behavior of biomimetic surfaces with hydrogel-supported nanostructures

Critical Casimir effect in three-dimensional Ising systems: Measurements on binary wetting films

Dewetting-Induced Membrane Formation by Adhesion of Amphiphile-Laden Interface

Encoding complex wettability patterns in chemically functionalized 3D photonic crystals

Pitcher plant inspired non-stick surface