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  Solidification and ordering during directional drying of a colloidal dispersion

Goehring, L., Clegg, W. J., & Routh, A. F. (2010). Solidification and ordering during directional drying of a colloidal dispersion. Langmuir, 26(12), 9269-9275. doi:10.1021/la100125v.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-B507-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-B508-F
Genre: Journal Article

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 Creators:
Goehring, Lucas1, Author              
Clegg, William J., Author
Routh, Alexander F., Author
Affiliations:
1Group Pattern formation in the geosciences, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063304              

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 Abstract: During drying, colloidal dispersions undergo processes such as solidification, cracking, and the draining of interstitial pores. Here we show that the solidification of polystyrene and silica dispersions, during directional drying, occurs in two separate stages. These correspond to the initial ordering and subsequent aggregation of the colloidal particles. Transitions between these stages are observed as changes in transparency and color that propagate as distinct fronts along the drying layer. The dynamics of these fronts are shown to arise from a balance between compressive capillary forces and the electrostatic and van der Waals forces described by DLVO theory. This suggests a simple method by which the maximum interparticle repulsion between particles can be measured through the optical inspection of the dynamics of a drying dispersion, under a microscope.

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Language(s): eng - English
 Dates: 2010-03-152010
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1021/la100125v
BibTex Citekey: goehring_solidification_2010
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Title: Langmuir
Source Genre: Journal
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Publ. Info: Columbus, OH : American Chemical Society
Pages: - Volume / Issue: 26 (12) Sequence Number: - Start / End Page: 9269 - 9275 Identifier: ISSN: 0743-7463
CoNE: /journals/resource/954925541194