Molecular Dynamics Simulation of a Polymer Droplet Transport Over Spherical Nanoparticles

Streaming Media

Document Type

Presentation

Publication Date

1-1-2021

Identifier/URL

39947577 (Pure)

Abstract

The dynamic behavior of a partially wetting polymer droplet driven over a nanostructured interface is investigated using molecular dynamics simulations. We consider the bead-spring model to represent a polymeric liquid that partially wets a rough surface composed of a periodic array of spherical particles. It is found that at sufficiently small values of the external force, the droplet remains pinned at the particles’ surface, while above the threshold, its motion consists of alternating periods of pinning and rapid displacements between neighboring particles. The latter process involves large periodic variation of the advancing and receding contact angles due to attachment and detachment of the contact line. Finally, upon increasing external force, the droplet center of mass is displaced steadily but the oscillation amplitude of the receding contact angle as well as the maximum contact angle hysteresis remain relatively unaffected. *ACS Petroleum Research Fund (60092-ND9)

Comments

Anish Thomas and Nikolai V Priezjev; APS March Meeting 2021; ACS Petroleum Research Fund (60092-ND9).The dynamic behavior of a partially wetting polymer drop...


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