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Issue 36, 2018
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Buckling of a drying colloidal drop

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It is well known that drying drops of colloidal dispersions undergo complex morphological transitions involving buckling of a particle-packed outer shell during drying. Although capillary stresses generated during drying have been identified as the cause for buckling, the exact conditions for buckling and its relation to the particle size, rigidity, and nature of packing have not been understood. Here, we derive explicit expressions for the critical capillary pressure for buckling of droplets based on the mechanical properties of the particle network formed during drying and the conditions under which buckling can be avoided. We anticipate our results to form the basis for design of formulations for the pharmaceutical, food and ceramics industry.

Graphical abstract: Buckling of a drying colloidal drop

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Article information

28 Jun 2018
14 Aug 2018
First published
15 Aug 2018

Soft Matter, 2018,14, 7455-7461
Article type

Buckling of a drying colloidal drop

M. S. Tirumkudulu, Soft Matter, 2018, 14, 7455
DOI: 10.1039/C8SM01324A

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