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Mixed solutions of an associating polymer with a cleavable surfactant

Karlberg, Maria LU ; Stjerndahl, M; Lundberg, D and Piculell, Lennart LU (2005) In Langmuir 21(21). p.9756-9763
Abstract
Mixtures of hydrophobically modified hydroxyethyl cellulose (HMHEC) and alkali-sensitive cleavable betaine ester surfactants have been studied by viscometry, H-1 NMR, absorbance measurements, and birefringence determinations. Before the hydrolysis, the surfactants behaved as conventional nondegradable surfactants in terms of the effect on the viscosity of increasing surfactant concentration. As the surfactants were hydrolyzed, systems with time-dependent viscosity were obtained. The viscosity either decreased monotonically or went through a maximum as a function of time, depending on the initial surfactant concentration. Different surfactant chain lengths gave rise to different viscosity profiles. The rate of hydrolysis, and thus the... (More)
Mixtures of hydrophobically modified hydroxyethyl cellulose (HMHEC) and alkali-sensitive cleavable betaine ester surfactants have been studied by viscometry, H-1 NMR, absorbance measurements, and birefringence determinations. Before the hydrolysis, the surfactants behaved as conventional nondegradable surfactants in terms of the effect on the viscosity of increasing surfactant concentration. As the surfactants were hydrolyzed, systems with time-dependent viscosity were obtained. The viscosity either decreased monotonically or went through a maximum as a function of time, depending on the initial surfactant concentration. Different surfactant chain lengths gave rise to different viscosity profiles. The rate of hydrolysis, and thus the time-dependency of the surfactant concentration, could be controlled by changing the pH of the solution. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
21
issue
21
pages
9756 - 9763
publisher
The American Chemical Society
external identifiers
  • wos:000232453300057
  • scopus:27144548846
ISSN
0743-7463
DOI
10.1021/la051205u
language
English
LU publication?
yes
id
5e544055-a861-40d2-9dd1-5f87ef2aa2bd (old id 157414)
date added to LUP
2007-07-11 13:43:28
date last changed
2017-01-01 05:05:48
@article{5e544055-a861-40d2-9dd1-5f87ef2aa2bd,
  abstract     = {Mixtures of hydrophobically modified hydroxyethyl cellulose (HMHEC) and alkali-sensitive cleavable betaine ester surfactants have been studied by viscometry, H-1 NMR, absorbance measurements, and birefringence determinations. Before the hydrolysis, the surfactants behaved as conventional nondegradable surfactants in terms of the effect on the viscosity of increasing surfactant concentration. As the surfactants were hydrolyzed, systems with time-dependent viscosity were obtained. The viscosity either decreased monotonically or went through a maximum as a function of time, depending on the initial surfactant concentration. Different surfactant chain lengths gave rise to different viscosity profiles. The rate of hydrolysis, and thus the time-dependency of the surfactant concentration, could be controlled by changing the pH of the solution.},
  author       = {Karlberg, Maria and Stjerndahl, M and Lundberg, D and Piculell, Lennart},
  issn         = {0743-7463},
  language     = {eng},
  number       = {21},
  pages        = {9756--9763},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Mixed solutions of an associating polymer with a cleavable surfactant},
  url          = {http://dx.doi.org/10.1021/la051205u},
  volume       = {21},
  year         = {2005},
}