Dynamic stratification in drying films of colloidal mixtures

Fortini, Andrea; Martin-Fabiani, Ignacio; de la Haye, Jennifer Lesage; Dugas, Pierre-Yves; Lansalot, Muriel; D'Agosto, Franck; Bourgeat-Lami, Elodie; Keddie, Joseph L.; Sear, Richard P.

PRL2016.pdf (6.84 MB)

Dynamic stratification in drying films of colloidal mixtures

journal contribution

posted on 2017-05-04, 08:43 authored by Andrea Fortini, Ignacio Martin-Fabiani, Jennifer Lesage de la Haye, Pierre-Yves Dugas, Muriel Lansalot, Franck D'Agosto, Elodie Bourgeat-Lami, Joseph L. Keddie, Richard P. Sear

In simulations and experiments, we study the drying of films containing mixtures of large and small colloidal particles in water. During drying, the mixture stratifies into a layer of the larger particles at the bottom with a layer of the smaller particles on top. We developed a model to show that a gradient in osmotic pressure, which develops dynamically during drying, is responsible for the segregation mechanism behind stratification.

Funding

European Union Seventh Framework Programme BARRIER-PLUS project (FP7-SME-2012-2, No. 304758).

History

School

Aeronautical, Automotive, Chemical and Materials Engineering

Department

Materials

Published in

Physical Review Letters

Volume

116

Issue

11

Citation

FORTINI, A. ... et al, 2016. Dynamic stratification in drying films of colloidal mixtures. Physical Review Letters, 116 (11), pp. 118301-1-118301-5.

Publisher

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2016-03-18

Copyright date

2016

Notes

This paper was accepted for publication in the journal Physical Review Letters and the definitive published version is available at http://dx.doi.org/10.1103/PhysRevLett.116.118301.