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Binding of SDS to Ethyl(hydroxyethyl)cellulose. Effect of Hydrophobic Modification of the Polymer

Thuresson, Krister LU ; Söderman, Olle; Hansson, Per and Wang, Geng (1996) In Journal of Physical Chemistry 100(12). p.4909-4918
Abstract
The binding of SDS to cellulose polymers in the semidilute concentration regime has been studied by means of NMR, ion-selective electrode, and a time-resolved fluorescence technique. Two polymers have been used, differing only in a low degree of hydrophobic modification of one of them. NMR self-diffusion and activity measurements show that the binding of SDS to the nonmodified polymer has a fairly pronounced critical aggregation concentration (cac), while binding to the hydrophobically modified polymer is less cooperative up to a concentration of about the cac in the nonmodified polymer/SDS system. NMR T-2 relaxation and fluorescence studies indicate that surfactants bound to the hydrophobically modified polymers in the noncooperative... (More)
The binding of SDS to cellulose polymers in the semidilute concentration regime has been studied by means of NMR, ion-selective electrode, and a time-resolved fluorescence technique. Two polymers have been used, differing only in a low degree of hydrophobic modification of one of them. NMR self-diffusion and activity measurements show that the binding of SDS to the nonmodified polymer has a fairly pronounced critical aggregation concentration (cac), while binding to the hydrophobically modified polymer is less cooperative up to a concentration of about the cac in the nonmodified polymer/SDS system. NMR T-2 relaxation and fluorescence studies indicate that surfactants bound to the hydrophobically modified polymers in the noncooperative regime have slow dynamics compared to micellized surfactants, to surfactants bound to the unmodified polymer, and to surfactants bound to the hydrophobically modified polymer in the cooperative regime. Furthermore, in the non-cooperative regime the fluorescence studies imply that the SDS aggregation number of the mixed micelles is low and that the number of hydrophobic zones is invariant with respect to the surfactant concentration. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry
volume
100
issue
12
pages
4909 - 4918
publisher
The American Chemical Society
external identifiers
  • scopus:0007783423
ISSN
0022-3654
DOI
10.1021/jp9520411
language
English
LU publication?
yes
id
1ce5ca14-a8f6-4df6-9f95-50ab6bb9816a (old id 30836)
date added to LUP
2007-06-19 14:36:24
date last changed
2017-08-20 04:22:54
@article{1ce5ca14-a8f6-4df6-9f95-50ab6bb9816a,
  abstract     = {The binding of SDS to cellulose polymers in the semidilute concentration regime has been studied by means of NMR, ion-selective electrode, and a time-resolved fluorescence technique. Two polymers have been used, differing only in a low degree of hydrophobic modification of one of them. NMR self-diffusion and activity measurements show that the binding of SDS to the nonmodified polymer has a fairly pronounced critical aggregation concentration (cac), while binding to the hydrophobically modified polymer is less cooperative up to a concentration of about the cac in the nonmodified polymer/SDS system. NMR T-2 relaxation and fluorescence studies indicate that surfactants bound to the hydrophobically modified polymers in the noncooperative regime have slow dynamics compared to micellized surfactants, to surfactants bound to the unmodified polymer, and to surfactants bound to the hydrophobically modified polymer in the cooperative regime. Furthermore, in the non-cooperative regime the fluorescence studies imply that the SDS aggregation number of the mixed micelles is low and that the number of hydrophobic zones is invariant with respect to the surfactant concentration.},
  author       = {Thuresson, Krister and Söderman, Olle and Hansson, Per and Wang, Geng},
  issn         = {0022-3654},
  language     = {eng},
  number       = {12},
  pages        = {4909--4918},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry},
  title        = {Binding of SDS to Ethyl(hydroxyethyl)cellulose. Effect of Hydrophobic Modification of the Polymer},
  url          = {http://dx.doi.org/10.1021/jp9520411},
  volume       = {100},
  year         = {1996},
}