Gisler, T., Ball, R. C. and Weitz, D. A.. (1999) Strain hardening of fractal colloidal gels. Physical Review Letters, Vol.82 (No.5). pp. 1064-1067. ISSN 0031-9007

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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 > 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
Date:	1 February 1999
Volume:	Vol.82
Number:	No.5
Number of Pages:	4
Page Range:	pp. 1064-1067
Identification Number:	10.1103/PhysRevLett.82.1064
Status:	Peer Reviewed
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/14901

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