Mechanics of interfacial composite materials

Anand Bala Subramaniam, Manouk Abkarian, L. Mahadevan, Howard A. Stone

Research output: Contribution to journalArticle

79 Scopus citations

Abstract

Recent experiments and simulations have demonstrated that particle-covered fluid/fluid interfaces can exist in stable nonspherical shapes as a result of the steric jamming of the interfacially trapped particles. The jamming confers the interface with solidlike properties. We provide an experimental and theoretical characterization of the mechanical properties of these armored objects, with attention given to the two-dimensional granular state of the interface. Small inhomogeneous stresses produce a plastic response, while homogeneous stresses produce a weak elastic response. Shear-driven particle-scale rearrangements explain the basic threshold needed to obtain the near-perfect plastic deformation that is observed. Furthermore, the inhomogeneous stress state of the interface is exhibited experimentally by using surfactants to destabilize the particles on the surface. Since the interfacially trapped particles retain their individual characteristics, armored interfaces can be recognized as a kind of composite material with distinct chemical, structural, and mechanical properties.

Original languageEnglish (US)
Pages (from-to)10204-10208
Number of pages5
JournalLangmuir
Volume22
Issue number24
DOIs
StatePublished - Nov 21 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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    Subramaniam, A. B., Abkarian, M., Mahadevan, L., & Stone, H. A. (2006). Mechanics of interfacial composite materials. Langmuir, 22(24), 10204-10208. https://doi.org/10.1021/la061475s