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Rheological properties of a surfactant-induced gel for the lysozyme-sodium dodecyl sulfate-water system

Montalvo, G and Khan, Ali LU (2005) In Colloid and Polymer Science 283(4). p.402-412
Abstract
Rheological properties of isotropic solutions and gel structures of lysozyme-sodium dodecyl sulfate mixtures in water are investigated. Isotropic solutions behave as Newtonian fluids with very low viscosity values. For the lysozyme solutions the intrinsic viscosity and the Huggins coefficient were calculated on the basis of the Mooney equation. Above a certain yield stress value, the viscosity of the gel samples decreases continuously in the whole range of the shear rate. Dynamic rheological experiments show weak gel behavior where the storage modulus and the loss modulus are almost parallel and are frequency-dependent. A belated gel stage with very slow kinetics has been characterized. There is a substantial enhancement of the gel... (More)
Rheological properties of isotropic solutions and gel structures of lysozyme-sodium dodecyl sulfate mixtures in water are investigated. Isotropic solutions behave as Newtonian fluids with very low viscosity values. For the lysozyme solutions the intrinsic viscosity and the Huggins coefficient were calculated on the basis of the Mooney equation. Above a certain yield stress value, the viscosity of the gel samples decreases continuously in the whole range of the shear rate. Dynamic rheological experiments show weak gel behavior where the storage modulus and the loss modulus are almost parallel and are frequency-dependent. A belated gel stage with very slow kinetics has been characterized. There is a substantial enhancement of the gel strength by ageing since the belated gel stage manifests a higher yield stress value and a higher storage modulus than the initial gel stage. The gels are stable in the temperature range between 10 and 32degreesC. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Colloid and Polymer Science
volume
283
issue
4
pages
402 - 412
publisher
Springer
external identifiers
  • wos:000226302300007
  • scopus:12144272437
ISSN
0303-402X
DOI
10.1007/s00396-004-1161-9
language
English
LU publication?
yes
id
557bca77-5212-4dbe-a6dc-0bf47b4bfa7e (old id 157500)
date added to LUP
2007-07-11 16:47:30
date last changed
2017-02-05 03:35:19
@article{557bca77-5212-4dbe-a6dc-0bf47b4bfa7e,
  abstract     = {Rheological properties of isotropic solutions and gel structures of lysozyme-sodium dodecyl sulfate mixtures in water are investigated. Isotropic solutions behave as Newtonian fluids with very low viscosity values. For the lysozyme solutions the intrinsic viscosity and the Huggins coefficient were calculated on the basis of the Mooney equation. Above a certain yield stress value, the viscosity of the gel samples decreases continuously in the whole range of the shear rate. Dynamic rheological experiments show weak gel behavior where the storage modulus and the loss modulus are almost parallel and are frequency-dependent. A belated gel stage with very slow kinetics has been characterized. There is a substantial enhancement of the gel strength by ageing since the belated gel stage manifests a higher yield stress value and a higher storage modulus than the initial gel stage. The gels are stable in the temperature range between 10 and 32degreesC.},
  author       = {Montalvo, G and Khan, Ali},
  issn         = {0303-402X},
  language     = {eng},
  number       = {4},
  pages        = {402--412},
  publisher    = {Springer},
  series       = {Colloid and Polymer Science},
  title        = {Rheological properties of a surfactant-induced gel for the lysozyme-sodium dodecyl sulfate-water system},
  url          = {http://dx.doi.org/10.1007/s00396-004-1161-9},
  volume       = {283},
  year         = {2005},
}