Effective attractive range and viscoelasticity of colloidal gels

P. H S Santos, O. H. Campanella, Marcelo Carignano

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We present a simulation study of colloidal particles having very short range attractions. In particular, we investigate the interplay between the effective attractive range and the viscoelastic properties of the gels that form when the temperature of the system is sufficiently low. Using Brownian dynamics simulations we study particles with different sizes and interaction ranges, and characterize the mechanical properties of the gels by performing small amplitude oscillatory and transient start-up shear simulations. We found that the effective attractive range is a key parameter affecting the gel viscoelastic properties. The crossover frequency between the storage and loss moduli and the time to reach the maximum stress in the start-up test are both simple functions of the effective attractive range. This journal is

Original languageEnglish
Pages (from-to)709-714
Number of pages6
JournalSoft Matter
Volume9
Issue number3
DOIs
Publication statusPublished - 21 Jan 2013

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viscoelasticity
Viscoelasticity
Gels
gels
simulation
attraction
crossovers
mechanical properties
shear
Mechanical properties
Computer simulation
interactions
Temperature
temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Effective attractive range and viscoelasticity of colloidal gels. / Santos, P. H S; Campanella, O. H.; Carignano, Marcelo.

In: Soft Matter, Vol. 9, No. 3, 21.01.2013, p. 709-714.

Research output: Contribution to journalArticle

Santos, P. H S ; Campanella, O. H. ; Carignano, Marcelo. / Effective attractive range and viscoelasticity of colloidal gels. In: Soft Matter. 2013 ; Vol. 9, No. 3. pp. 709-714.
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