Effective attractive range and viscoelasticity of colloidal gels

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.

• Publication year

  2013

• Venue

  Soft Matter

• Publication date

  2013-01-21

• Fields of study

  Materials Science, Physics

• Identifiers
  DOI 10.1039/c2sm26585karXiv 1307.3615
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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