Role of particle shape anisotropy on crack formation in drying of colloidal suspension.

ABSTRACT: Cracks in a colloidal film formed by evaporation induced drying can be controlled by changing drying conditions. We show, for the first time that the crack morphologies in colloidal films are dependent on shape of constituting particles apart from the microstructure and particle assembly. In order to investigate the particle shape effect on crack patterns, monodispered spherical and ellipsoidal particles are used in sessile drop experiments. On observing the dried sessile drop we found cracks along the radial direction for spherical particle dispersions and circular crack patterns for ellipsoidal particle dispersions. The change in crack pattern is a result of self assembly of shape anisotropic particles and their ordering. The ordering of particles dictate the crack direction and the crac

SUBMITTER: Dugyala VR 

PROVIDER: S-EPMC4967893 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature