On the relationship between rheology and percolation in the gelation of weakly attractive colloids: Beyond "snapshot" percolation

Details On the relationship between rheology and percolation in the gelation of weakly attractive colloids: Beyond "snapshot" percolation On the relationship between rheology and percolation in the gelation of weakly attractive colloids: Beyond "snapshot" percolation

2004-06-29

arxiv.org/abs/cond-mat/0406713v1

Physics

Condensed Matter

Statistical Mechanics

4 pages

Scientific paper

A discussion on the viscoelastic properties of weakly attractive colloids and the relation to a newly developed percolation theory is presented. The need for taking into account the particle-particle bond lifetime in order to compare rheological and percolation estimates of the sol-gel transition is stressed. Recent molecular dynamics simulations and generalised percolation theory that use a bond lifetime criterion in the definition of aggregates show that the percolation transition can be reconciled with the rheological sol-gel transition. The percolation concept is used here as a "measuring" tool to assess the viscoelastic behaviour of the system.

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