Impact-induced solidlike behavior and elasticity in concentrated colloidal suspensions.
basic_science · Level V
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- Record sourced from PubMed, PMID 29347503.
- Also identified by DOI 10.1103/PhysRevE.96.042601.
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Abstract
Modified drop weight impact tests were performed on SiO_{2}-ethylene glycol concentrated suspensions. Counterintuitive impact-induced solidlike behavior and elasticity, causing significant deceleration and rebound of the impactor, were observed. We provide evidence that the observed large deceleration force on the impactor mainly originates from the hydrodynamic force, and that the elasticity arises from the short-range repulsive force of a solvation layer on the particle surface. This study presents key experimental results to help understand the mechanisms underlying various stress-induced solidification phenomena.