Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 553188
Title Plasticity in colloidal gel strands
Author(s) Verweij, Joanne E.; Leermakers, Frans A.M.; Sprakel, Joris; Gucht, Jasper Van Der
Source Soft Matter 15 (2019)32. - ISSN 1744-683X - p. 6447 - 6454.
DOI https://doi.org/10.1039/c9sm00686a
Department(s) Physical Chemistry and Soft Matter
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2019
Availibility Full text available from 2020-07-16
Abstract

Colloidal gels are space-spanning networks of aggregated particles. The mechanical response of colloidal gels is governed, to a large extent, by the properties of the individual gel strands. To study how colloidal gels respond to repeated deformations, we perform Brownian dynamics simulations on single strands of aggregated colloidal particles. While current models assume that gel failure is due to the brittle rupture of gel strands, our simulations show that gel strands undergo large plastic deformations prior to breaking. Rearrangement of particles within the strands leads to plastic lengthening and softening of the strands, which may ultimately lead to strand necking and ductile failure. This failure mechanism occurs irrespective of the thickness and length of the strands and the range and strength of the interaction potential. Rupture of gel strands is more likely for long and thin strands and for a long-ranged interaction potential.

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