Lateral surface nonuniformities in drying latex films

Gundabala, Venkata R. and Lei, Chun-hong and Ouzineb, Keltoum and Dupont, Olivier and Keddie, Joseph L. and Routh, Alexander F. (2008) Lateral surface nonuniformities in drying latex films. AIChE Journal, 54 (12). pp. 3092-3105. DOI 10.1002/aic.11621

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Official URL: http://dx.doi.org/10.1002/aic.11621

Abstract

The length scales of film thickness nonuniformities, commonly observed in polymer colloid (i.e., latex) films, are predicted. This prediction is achieved by investigating the stability behavior of drying latex films. A linear stability analysis is performed on a base solution representing a uniformly drying latex film containing a surfactant. The analysis identifies film thickness nonuniformities over two length scales: long (millimeter) range (from lubrication theory) and short (micrometer) range (from nonlubrication theory). Evaporation and surfactant desorption into the bulk film are identified as the primary destabilizing mechanisms during drying. Experimental evidence through direct visualization and atomic force microscopy confirm the existence of nonuniformities over both length scales, which are shown to be functions of parameters such as initial particle volume fraction, surfactant amount, and desorption strength, while being independent of drying rate. © 2008 American Institute of Chemical Engineers AIChE J, 2008

Item Type: Article
Uncontrolled Keywords: BPI
Subjects: 99 - Other
Divisions: 99 - Other
Journal or Publication Title: AIChE Journal
Volume: 54
Page Range: pp. 3092-3105
Identification Number: 10.1002/aic.11621
Depositing User: Sarah Humbert
Date Deposited: 08 Jul 2010 09:16
Last Modified: 23 Jul 2013 09:57
URI: http://eprints.esc.cam.ac.uk/id/eprint/1431

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