Work

Microscopic contact line dynamics dictate the emergent behaviors of particle rafts

Year: 2025

Type: article

Abstract: Particle rafts --- fluid-fluid interfaces covered with particles --- form wrinkles and folds when compressed, like a crumpled piece of paper. Nevertheless, composed of discrete particles, rafts under compression can also fail by expelling single particles, which cannot be explained by existing continuum models. We develop a composite model that incorporates the contact line dynamics of individual particles to fully describe both the elastic and granular responses of the compressed particle rafts. By using this new model framework, we also demonstrate the control of raft behaviors by tuning the physicochemical properties of individual particles.

Source: Physical Review Fluids

DOI: 10.1103/ld9n-ctdh

Authors: Ranit Mukherjee, Zih-Yin Chen, Xiang Cheng, Sungyon Lee

Institution: University of Minnesota

Language: English

Topic: Pickering emulsions and particle stabilization

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: National Science Foundation

Awards: Collaborative Research: Actuating and Sensing Objects on a Free Surface, Dynamics of granular raft on a moving interface: assembly, structure, and property, University of Minnesota Materials Research Science and Engineering Center