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Drying paths of phase-separating solution coatings exposed to humidity / Masato Yamamura in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)

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inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. 15-23

Titre :	Drying paths of phase-separating solution coatings exposed to humidity
Type de document :	texte imprimé
Auteurs :	Masato Yamamura, Auteur
Année de publication :	2022
Article en page(s) :	p. 15-23
Note générale :	Bibliogr.
Langues :	Américain (ame)
Catégories :	Azéotropes Diagrammes de phases Humidité -- Absorption:Eau -- Absorption Revêtement -- Séchage Séparation (technologie) Simulation par ordinateur Vapeur d'eau
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Drying process paths, i.e., time-dependent trajectories of solution compositions on a phase diagram, were examined for coatings of a water-immiscible acrylic monomer dissolved in ethanol and exposed to humidity. The absorption of water vapor quenched the solution into a thermodynamic nonequilibrium state and promoted a spontaneous phase separation when the water content in the solution exceeded a critical value. A simultaneous mass-loss and heat-flux measurement technique was proposed and adapted for phase-separating coatings to determine the evaporation rates of two volatile components with different latent heats of vaporization. The measured drying paths agreed with those predicted from a drying model that takes into account the gas-diffusion-limited evaporation and composition-dependent activities. The numerical predictions also revealed that the pseudo-azeotrope determined the critical drying conditions, under which any drying paths on the phase diagram did not cross the two-phase region, and thus the drying solutions remained stable.
DOI :	https://doi.org/10.1007/s11998-021-00483-z
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-021-00483-z.pdf
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37141

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