Predicting coffee ring formation upon drying in droplets of particle suspensions

Michael J. Hertaeg; Clare Rees-Zimmerman; Rico F. Tabor; Alexander F. Routh; Gil Garnier

doi:10.1016/j.jcis.2021.01.092

Predicting coffee ring formation upon drying in droplets of particle suspensions

Michael J. Hertaeg, Clare Rees-Zimmerman, Rico F. Tabor, Alexander F. Routh, Gil Garnier

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

35 Citations (SciVal)

Abstract

Pattern formation is a common occurrence in drying colloidal systems. The most common in droplets, is a ring distribution where the constituents have relocated to the edge, which is referred to as a coffee ring. This deposit is unfavourable in many manufacturing processes and is of fundamental interest. In this study, we present a model capable of predicting when a coffee ring will be observed in hard spherical particle systems. Ring profiles are found to be formed at low contact angles with the specific angle predicated upon the initial concentration of the suspension. Modelling results are in agreement with experiments using latex suspensions.

Original language	English
Pages (from-to)	52-57
Number of pages	6
Journal	Journal of Colloid and Interface Science
Volume	591
Early online date	1 Feb 2021
DOIs	https://doi.org/10.1016/j.jcis.2021.01.092
Publication status	Published - 30 Jun 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Inc.

Acknowledgements

This work was funded by the Australian Research Council ARC LP160100544 with Haemokinesis and an Australian Government Research Training Program (RTP) Scholarship. This work was supported in part by the Monash eResearch Center and eSolutions-Research Support Services for the use of the MonARCH HPC Cluster.

Keywords

Coffee ring
Colloid suspensions
Droplet
Drying
Evaporation
Modelling

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/j.jcis.2021.01.092

https://www.repository.cam.ac.uk/items/787165e6-92d2-442f-a222-64b9f2413b0bLicence: CC BY-NC-ND

Cite this

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AU - Rees-Zimmerman, Clare

AU - Tabor, Rico F.

AU - Routh, Alexander F.

AU - Garnier, Gil

PY - 2021/6/30

Y1 - 2021/6/30

N2 - Pattern formation is a common occurrence in drying colloidal systems. The most common in droplets, is a ring distribution where the constituents have relocated to the edge, which is referred to as a coffee ring. This deposit is unfavourable in many manufacturing processes and is of fundamental interest. In this study, we present a model capable of predicting when a coffee ring will be observed in hard spherical particle systems. Ring profiles are found to be formed at low contact angles with the specific angle predicated upon the initial concentration of the suspension. Modelling results are in agreement with experiments using latex suspensions.

AB - Pattern formation is a common occurrence in drying colloidal systems. The most common in droplets, is a ring distribution where the constituents have relocated to the edge, which is referred to as a coffee ring. This deposit is unfavourable in many manufacturing processes and is of fundamental interest. In this study, we present a model capable of predicting when a coffee ring will be observed in hard spherical particle systems. Ring profiles are found to be formed at low contact angles with the specific angle predicated upon the initial concentration of the suspension. Modelling results are in agreement with experiments using latex suspensions.

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KW - Droplet

KW - Drying

KW - Evaporation

KW - Modelling

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JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

Predicting coffee ring formation upon drying in droplets of particle suspensions

Abstract

Bibliographical note

Acknowledgements

Keywords

ASJC Scopus subject areas

Access to Document

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