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

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)

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 languageEnglish
Pages (from-to)52-57
Number of pages6
JournalJournal of Colloid and Interface Science
Volume591
DOIs
Publication statusPublished - Jun 2021

Keywords

  • Coffee ring
  • Colloid suspensions
  • Droplet
  • Drying
  • Evaporation
  • Modelling

Cite this