AI Article Synopsis
- Pattern formation in drying droplets, especially the ring distribution known as a "coffee ring," is often seen in colloidal systems and can be problematic for manufacturing.
- This study introduces a predictive model that determines when this coffee ring effect will occur in systems with hard spherical particles.
- Findings suggest that a coffee ring develops at low contact angles, with the specific angle depending on the initial concentration of the particle suspension, and the model's predictions align with experimental results using latex suspensions.
Article 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.
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| http://dx.doi.org/10.1016/j.jcis.2021.01.092 | DOI Listing |
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