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Colloidal assembly of polydisperse particle blends during drying

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journal contribution
posted on 04.09.2020, 09:57 by Yichen Dong, Nicolas Busatto, Peter J Roth, Nacho Martin-Fabiani-CarratoNacho Martin-Fabiani-Carrato

In this work, we synthesize a polydisperse aqueous colloidal system composed of small and large zwitterionic particles, as well as medium sized standard acrylic particles. By assembling these dispersions into films by drying, we show using atomic force microscopy (AFM) how their top surfaces can be mostly covered by zwitterionic groups for a wide range of evaporation rates. We probe underneath the top film surface using Fourier-transform infrared (FTIR) spectroscopy – attenuated total reflection (ATR), observing that the content in zwitterionic particles of the film upper layer increases for faster evaporation rates. We show how polydisperse systems hold great potential to overcome the evaporation rate dependence of size segregation processes in drying colloidal blends, and we provide further insights into the assembly mechanisms involved. Polydisperse blends enhance the robustness of such processes for application in coatings and other soft products where evaporation rate can not be tuned.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Soft Matter

Volume

16

Issue

36

Pages

8453 - 8461

Publisher

Royal Society of Chemistry (RSC)

Version

VoR (Version of Record)

Rights holder

© The Royal Society of Chemistry

Publisher statement

This is an Open Access Article. It is published by the Royal Society of Chemistry under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: https://creativecommons.org/licenses/by/3.0/

Acceptance date

11/08/2020

Publication date

2020-08-17

Copyright date

2020

ISSN

1744-683X

eISSN

1744-6848

Language

en

Depositor

Dr Nacho Martin-Fabiani Carrato. Deposit date: 1 September 2020

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