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  Drying paint: From micro-scale dynamics to mechanical instabilities

Goehring, L., Li, J., & Kiatkirakajorn, P.-C. (2017). Drying paint: From micro-scale dynamics to mechanical instabilities. Philosophical Transactions of the Royal Society of London, Series A: Mathematical, Physical and Engineering Sciences, 375(2093):. doi:10.1098/rsta.2016.0161.

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資料種別: 学術論文

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 作成者:
Goehring, Lucas1, 著者           
Li, Joaquim1, 著者           
Kiatkirakajorn, Pree-Cha1, 著者           
所属:
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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キーワード: colloids, small-angle X-ray scattering, drying, solidification, fracture, shear bands
 要旨: 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 summarize 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 in 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.This article is part of the themed issue ‘Patterning through instabilities in complex media: theory and applications.’

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言語: eng - English
 日付: 2017-04-032017-05-13
 出版の状態: 出版
 ページ: -
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 目次: -
 査読: 査読あり
 識別子(DOI, ISBNなど): DOI: 10.1098/rsta.2016.0161
 学位: -

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出版物名: Philosophical Transactions of the Royal Society of London, Series A : Mathematical, Physical and Engineering Sciences
種別: 学術雑誌
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出版社, 出版地: -
ページ: 21 巻号: 375 (2093) 通巻号: 20160161 開始・終了ページ: - 識別子(ISBN, ISSN, DOIなど): -