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Strain Hardening and Fracture of Heat-set Fractal Globular Protein Gels by Matthieu Pouzot; Taco Nicolai; Lazhar Benyahia; Dominique Durand is a Chemistry article available to read on EtoBox.

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Non-linear mechanical behavior at large shear deformation was been investigated for heat-set β-lactoglobulin gels at pH 7 and 0.1 M NaCl using both oscillatory shear and shear flow. These gels have a self-similar structure at length scales smaller than the correlation length of the gel with fractal dimension d f = 2. Strain hardening is observed that can be well described using the model proposed by Gisler et al. [T.C. Gisler, R.C. Ball, D.A. Weitz, Phys. Rev. Let. 82 (1999) 1064] for fractal colloidal gels. The increase of the shear modulus normalized by the low strain value (G 0 ) is independent of G 0 . For weak gels the elasticity increases up to a factor of ten, while for strong gels the increase is very small. At higher deformation irreversible fracture occurs, which leads eventually to macroscopic failure of the gel. For weak gels formed at low concentrations the deformation at failure is about 2, independent of the shear modulus. For strong gels fracture occurs at approximately constant stress (2 × 10 3 Pa).

Who reads Strain Hardening and Fracture of Heat-set Fractal Globular Protein Gels?

Author

Matthieu Pouzot; Taco Nicolai; Lazhar Benyahia; Dominique Durand

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

2006

Language

EN

Field

Chemistry (Physical Sciences)