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PORE EVOLUTION AND SOLVENT TRANSPORT DURING DRYING OF GELLED SOL-GEL COATINGS: PREDICTING 'SPR1NGBACK'
Journal article   Peer reviewed

PORE EVOLUTION AND SOLVENT TRANSPORT DURING DRYING OF GELLED SOL-GEL COATINGS: PREDICTING 'SPR1NGBACK'

R.A. Cairncross, P R Schunk, K.S. Chen, S.S. Prakash, J. Samuel, A J Hurd and C.J. Brinker
Drying technology, v 15(6-8), pp 1815-1825
01 Jul 1997
DOI: https://doi.org/10.1080/07373939708917329
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

effective stress poroelasticity porous media
This paper reports predictions of drying phenomena in deformable porous gel coatings (i.e. a porous solid elastic network filled with air or solvent). Initially, a gelled coating is saturated with solvent, but as it dries, liquid-vapor menisci begin to recede into larger pores and the gel becomes a partially-saturated porous medium. The tensile capillary pressure in the liquid causes a compressive deformation on the solid skeleton and a consequent reduction in thickness and pore-size of the coating. A theory coupling the large deformation of the solid skeleton to capillary pressure in the interstitial liquid is used to predict the course of drying of dip-coated porous gel coatings. The theory predicts a 'springback' effect in late stages of drying as the effects of capillary pressure diminish, which matches with experimental observations.

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10 Record Views
10 citations in Web of Science
11 citations in Scopus

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Collaboration types
Domestic collaboration
Web of Science research areas
Engineering, Chemical
Engineering, Mechanical
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