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Issue 36, 2018
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Buckling of a drying colloidal drop

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Abstract

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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Publication details

The article was received on 28 Jun 2018, accepted on 14 Aug 2018 and first published on 15 Aug 2018


Article type: Paper
DOI: 10.1039/C8SM01324A
Citation: Soft Matter, 2018,14, 7455-7461
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    Buckling of a drying colloidal drop

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

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