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Autostratification in drying colloidal dispersions: experimental investigations

Trueman, RE, Lago Domingues, E, Emmett, SN, Murray, MW, Keddie, JL and Routh, AF (2012) Autostratification in drying colloidal dispersions: experimental investigations Langmuir, 28 (7). 3420 - 3428. ISSN 0743-7463

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Abstract

In films cast from a colloidal dispersion comprising two particle sizes, we experimentally examine the distribution of particles normal to the substrate. The particle concentrations at various positions in the film are determined through atomic force microscopy and NMR profiling. The results are compared to a previously derived diffusional model. Evidence for diffusional driven stratification is found, but the importance of other flows is also highlighted. The conditions that enhance particle stratification are found to be a colloidally stable dispersion, low initial volume fractions, a low concentration of the stratifying particle, and for the Peclet numbers of the two components to straddle unity.

Item Type: Article
Additional Information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/la203975b
Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Symplectic Elements
Date Deposited: 30 Jul 2012 10:32
Last Modified: 23 Sep 2013 19:16
URI: http://epubs.surrey.ac.uk/id/eprint/246798

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