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Auto-stratification in drying colloidal dispersions: A diffusive model
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DOI：10.1016/j.jcis.2012.03.045.png)
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The mechanism by which the particles in a drying film come into close packing during solvent evaporation has an important role to play in the final film morphology. During drying the particles can develop non-uniform concentrations across the vertical height of the film, depending on their diffusion rate. By applying the principles of classical diffusion mechanics to a hard sphere system, a theory for this novel method of stratification during drying of a two component film has been derived. The model is dependent on the particle Peclet numbers and when one is above unity and the other below, maximum stratification is observed. (C) 2012 Elsevier Inc. All rights reserved.
Keyword:
Stratification
Diffusion
Colloidal hydrodynamics
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9.7
论文数:
3.7W
被引数:
14.7W
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Evaporative lithographic patterning of binary colloidal films.png)
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