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Physics of Impregnation

Published online by Cambridge University Press:  14 March 2018

J. Roy Nelson
J. Roy Nelson*
Affiliation:
Material Testing Laboratory
*
[email protected]

Extract

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There appears to be some confusion as to how materials are impregnated or dried. Without getting into the exciting mathematical details best suited for persons who second language is Greek, I offer the following short explanation as to how materials are impregnated or dried.

If the object is porous, the porosity is described in terms of macropores (>50 nm), mesopores (50 - 2 nm), and micropores (2 - 0.8 nm). These three size classes of pores represent different flow mechanisms for the impregnation of porous materials. Solvent penetration of a non-porous particle by imbibing is similar mathematically to solvent penetration of micropores although the actual mechanism is quite different.

Type
Research Article
Information
Microscopy Today , Volume 8 , Issue 1 , January 2000 , pp. 24
Copyright
Copyright © Microscopy Society of America 2000

References

Meares, Patrick, Polymers, Structure and Bulk Properties, 1967.Google Scholar
Nandi, S.P., “The Unsteady State Diffusion of Gases from Coals,” Ph.D. Thesis, The Pennsylvania State University, 1964.Google Scholar
Karn, F.S., Friedal, R.A., and Sharkey, A.G. Jr., “Mechanism of Gas Flow Through Coal,” Fuel, 54, 1975.CrossRefGoogle Scholar