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Goehring, L 
ORCID: https://orcid.org/0000-0002-3858-7295, Li, J and Kiatkirakajorn, P-C,
2017.
Drying paint: from micro-scale dynamics to mechanical instabilities.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 375 (2093), p. 20160161.
ISSN 1364-503X
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Abstract
Charged colloidal dispersions make up the basis of a broad range of industrial and commercial products, from paints to coatings and additives in cosmetics. During drying, an initially liquid dispersion of such particles is slowly concentrated into a solid, displaying a range of mechanical instabilities in response to highly variable internal pressures. Here we summarise the current appreciation of this process by pairing an advection-diffusion model of particle motion with a Poisson-Boltzmann cell model of inter-particle interactions, to predict the concentration gradients around a drying colloidal film. We then test these predictions with osmotic compression experiments on colloidal silica, and small-angle x-ray scattering experiments on silica dispersions drying in Hele-Shaw cells. Finally, we use the details of the microscopic physics at play in these dispersions to explore how two macroscopic mechanical instabilities – shear-banding and fracture – can be controlled.
| Item Type: | Journal article |
|---|---|
| Publication Title: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
| Creators: | Goehring, L., Li, J. and Kiatkirakajorn, P.-C. |
| Publisher: | The Royal Society Publishing |
| Date: | 3 April 2017 |
| Volume: | 375 |
| Number: | 2093 |
| ISSN: | 1364-503X |
| Identifiers: | Number Type 10.1098/rsta.2016.0161 UNSPECIFIED |
| Divisions: | Schools > School of Science and Technology |
| Record created by: | Linda Sullivan |
| Date Added: | 08 Mar 2017 09:11 |
| Last Modified: | 03 Apr 2018 03:00 |
| Related URLs: | |
| URI: | https://irep.ntu.ac.uk/id/eprint/30319 |
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