Title: Hydration pressure of a homologous series of nonionic alkyl hydroxyoligo(ethylene oxide) surfactants
Authors: Pfeiffer, Helge ×
Binder, H
Klose, G
Heremans, Karel #
Issue Date: Jan-2004
Publisher: Royal soc chemistry
Series Title: Physical Chemistry Chemical Physics vol:6 issue:3 pages:614-618
Abstract: The hydration pressure of a homologous series of nonionic surfactants of the type CH3(CH2)(n-1)(OCH2CH2)(m)OH (CnEm) was determined by using sorption gravimetry. The hydration pressure shows a non-exponential decay on hydration and the curves are best fitted with a rational function. The non-exponential character is explained by contributions arising from the bending energy of non-lamellar liquid crystalline phases. The parameters obtained show that hydration of pure nonionic surfactants is correlated with the number of the oxyethylene groups in the headgroup. However, they are almost independent of the length of the alkyl chain. Exceptions are surfactants in the solid crystalline state that almost prevent hydration. Furthermore, the respective mesophase structures do not dominate the hydration behaviour. The Gibbs free energy (free enthalpy) of hydration is -1.1 kJ mol(-1) per oxyethylene group.
ISSN: 1463-9076
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Biochemistry, Molecular and Structural Biology Section
× corresponding author
# (joint) last author

Files in This Item:
File Status SizeFormat
pub06830.pdf Published 240KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science