Publikation:

Strain Hardening of Fractal Colloidal Gels

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1999_Gisler_Strain_Hardening.pdf
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1999

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Ball, Robin C.
Weitz, David A.

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-52568
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https://doi.org/10.1103/PhysRevLett.82.1064
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Attribution-NonCommercial-NoDerivs 2.0 Generic

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Published

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Physical Review Letters. 1999, 82(5), pp. 1064-1067. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.82.1064

Zusammenfassung

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'(w), larger than the loss modulus, G"(w), and with both G'(w) and G"(w) exhibiting only a very weak frequency dependence. Upon small but finite strains γ < 0.45 the elastic modulus increases roughly exponentially with γ². We explain the observed strain hardening with the highly nonlinear elastic response of the rigid backbone of the gel to elongational deformation.

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530 Physik

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ISO 690GISLER, Thomas, Robin C. BALL, David A. WEITZ, 1999. Strain Hardening of Fractal Colloidal Gels. In: Physical Review Letters. 1999, 82(5), pp. 1064-1067. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.82.1064
BibTex
@article{Gisler1999Strai-4777,
  year={1999},
  doi={10.1103/PhysRevLett.82.1064},
  title={Strain Hardening of Fractal Colloidal Gels},
  number={5},
  volume={82},
  issn={0031-9007},
  journal={Physical Review Letters},
  pages={1064--1067},
  author={Gisler, Thomas and Ball, Robin C. and Weitz, David A.}
}
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    <dcterms:abstract xml:lang="eng">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'(w), larger than the loss modulus, G"(w), and with both G'(w) and G"(w) exhibiting only a very weak frequency dependence. Upon small but finite strains γ &lt; 0.45 the elastic modulus increases roughly exponentially with γ². We explain the observed strain hardening with the highly nonlinear elastic response of the rigid backbone of the gel to elongational deformation.</dcterms:abstract>
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