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Phase diagram and physicochemical properties of the n-octyl alpha-D-glucoside/water system

Kocherbitov, Vitaly LU and Söderman, Olle LU (2003) In Physical Chemistry Chemical Physics 5(23). p.5262-5270
Abstract
Four experimental methods were used to study the phase diagram, as well as the thermodynamic and structural properties of the binary system n-octyl alpha-D-glucoside

water in the temperature range 25-130degreesC. Sorption calorimetry allows one to determine the activity of water and enthalpy of mixing as functions of water content at constant temperature, while DSC scans temperature at constant composition and provides information on enthalpies of phase transitions. Therefore, the combination of the two calorimetric methods is a powerful too] to study composition-temperature phase diagrams. While calorimetry can be used to determine boundaries of the phases, NMR and SAXS methods are used to study their structures. A detailed phase... (More)
Four experimental methods were used to study the phase diagram, as well as the thermodynamic and structural properties of the binary system n-octyl alpha-D-glucoside

water in the temperature range 25-130degreesC. Sorption calorimetry allows one to determine the activity of water and enthalpy of mixing as functions of water content at constant temperature, while DSC scans temperature at constant composition and provides information on enthalpies of phase transitions. Therefore, the combination of the two calorimetric methods is a powerful too] to study composition-temperature phase diagrams. While calorimetry can be used to determine boundaries of the phases, NMR and SAXS methods are used to study their structures. A detailed phase diagram of the system is presented. A liquid crystalline cubic phase previously not reported in the system was found. The hydration in the system is endothermic, excluding the exothermic formation of hydrates. Using the sorption calorimetric method the lengths of the very short tie lines between the isotropic micellar and liquid crystalline phases were determined. Van der Waals's differential equation was used to calculate the slopes of t

e phase boundaries. The parameters of the lamellar, cubic and hexagonal liquid

crystalline phases were determined by means of SAXS. It was found that

the area per surfactant headgroup in the liquid crystalline phases

varied with composition. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Chemistry Chemical Physics
volume
5
issue
23
pages
5262 - 5270
publisher
Royal Society of Chemistry
external identifiers
  • wos:000187086000019
  • scopus:0344197003
ISSN
1463-9084
DOI
10.1039/b306350j
language
English
LU publication?
yes
id
8b0de25d-b4f3-4bb0-b6e4-338a24f18cae (old id 122074)
date added to LUP
2007-07-11 14:35:58
date last changed
2018-10-14 04:05:54
@article{8b0de25d-b4f3-4bb0-b6e4-338a24f18cae,
  abstract     = {Four experimental methods were used to study the phase diagram, as well as the thermodynamic and structural properties of the binary system n-octyl alpha-D-glucoside<br/><br>
water in the temperature range 25-130degreesC. Sorption calorimetry allows one to determine the activity of water and enthalpy of mixing as functions of water content at constant temperature, while DSC scans temperature at constant composition and provides information on enthalpies of phase transitions. Therefore, the combination of the two calorimetric methods is a powerful too] to study composition-temperature phase diagrams. While calorimetry can be used to determine boundaries of the phases, NMR and SAXS methods are used to study their structures. A detailed phase diagram of the system is presented. A liquid crystalline cubic phase previously not reported in the system was found. The hydration in the system is endothermic, excluding the exothermic formation of hydrates. Using the sorption calorimetric method the lengths of the very short tie lines between the isotropic micellar and liquid crystalline phases were determined. Van der Waals's differential equation was used to calculate the slopes of t<br/><br>
e phase boundaries. The parameters of the lamellar, cubic and hexagonal liquid<br/><br>
	crystalline phases were determined by means of SAXS. It was found that<br/><br>
	the area per surfactant headgroup in the liquid crystalline phases<br/><br>
	varied with composition.},
  author       = {Kocherbitov, Vitaly and Söderman, Olle},
  issn         = {1463-9084},
  language     = {eng},
  number       = {23},
  pages        = {5262--5270},
  publisher    = {Royal Society of Chemistry},
  series       = {Physical Chemistry Chemical Physics},
  title        = {Phase diagram and physicochemical properties of the n-octyl alpha-D-glucoside/water system},
  url          = {http://dx.doi.org/10.1039/b306350j},
  volume       = {5},
  year         = {2003},
}