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How can we explaine the adhesion force?

  1. Apr 18, 2008 #1
    Hello,

    How can we explain the adhesion force between two different materials, for instance Glass and honey, or glass and water. if we put a droplet of honey why it does stick more firmly than a droblet of water? what are the forces reponsible on that ?
    I'm looking to atomic scale explanation if it is possible.

    the attached link gives an experiment on reducing the adhesion force, but I don't have any explanation :confused: .

    ww.memsuniverse.com/?p=234

    I would appreciate if you can help :smile: .

    Many thanks.

    NEMS
     
  2. jcsd
  3. Apr 18, 2008 #2

    Andy Resnick

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    We do not yet have a good theory for wetting. That is different than adhesion, BTW. And neither has anything to do with viscosity.

    Wetting behavior correlates with interfacial energy- we are unable to calculate interfacial energies from first principles, but there are some general chemical and physical principles we can use to manipulate the interfacial energy (chemical composition, temperature, etc).
     
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