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Strain hardening of fractal colloidal gels

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Gisler, T., Ball, Robin and Weitz, D. A. (1999) Strain hardening of fractal colloidal gels. Physical Review Letters, Vol.82 (No.5). pp. 1064-1067. doi:10.1103/PhysRevLett.82.1064 ISSN 0031-9007.

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.82.1064

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Abstract

We report on experiments on the rheology of gels formed by diffusion-limited aggregation of neutrally buoyant colloidal particles. These gels form very weak solids, with the elastic modulus, G'(omega), larger than the loss modulus, G "(omega), and with both G'(omega) and G "(omega) exhibiting only a very weak frequency dependence. Upon small but finite strains gamma < 0.45 the elastic modulus increases roughly exponentially with gamma(2). We explain the observed strain hardening with the highly nonlinear elastic response of the rigid backbone of the gel to elongational deformation.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Colloids, Strain hardening, Fractals, Rheology
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 1 February 1999
Dates:
DateEvent
1 February 1999Published
Volume: Vol.82
Number: No.5
Number of Pages: 4
Page Range: pp. 1064-1067
DOI: 10.1103/PhysRevLett.82.1064
Status: Peer Reviewed
Publication Status: Published

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