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Glassy crystalline state and water sorption of alkyl maltosides

Kocherbitov, Vitaly LU and Söderman, Olle LU (2004) In Langmuir 20(8). p.3056-3061
Abstract
A differential scanning calorimetric and sorption calorimetric study of two alkyl maltosides, C(8)G(2) and C(10)G(2), was performed. In the dry state, C(8)G(2) and C(10)G(2) do not form solid crystals but undergo a glass transition upon temperature change. The glass is partly ordered and has the same lamellar structure as the liquid crystals formed by the two maltosides. To reflect the presence of the glass transition and the structure, the terms "glassy crystals" and "glassy liquid crystals" can be used. A mechanism of the relaxation of the glassy crystals based on the results of small-angle X-ray scattering experiments is proposed. Experiments on water sorption showed that the glassy crystals turn into lyotropic liquid crystals upon... (More)
A differential scanning calorimetric and sorption calorimetric study of two alkyl maltosides, C(8)G(2) and C(10)G(2), was performed. In the dry state, C(8)G(2) and C(10)G(2) do not form solid crystals but undergo a glass transition upon temperature change. The glass is partly ordered and has the same lamellar structure as the liquid crystals formed by the two maltosides. To reflect the presence of the glass transition and the structure, the terms "glassy crystals" and "glassy liquid crystals" can be used. A mechanism of the relaxation of the glassy crystals based on the results of small-angle X-ray scattering experiments is proposed. Experiments on water sorption showed that the glassy crystals turn into lyotropic liquid crystals upon sorption of water at constant temperature. This isothermal glass transition can be characterized by water content and change of partial molar enthalpy of mixing of water. A method to calculate the phase diagram liquid crystals-glassy liquid crystals is proposed. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
20
issue
8
pages
3056 - 3061
publisher
The American Chemical Society
external identifiers
  • pmid:15875829
  • wos:000220750300012
  • scopus:2342441675
ISSN
0743-7463
DOI
10.1021/la035553c
language
English
LU publication?
yes
id
b8294c20-8aa2-4393-9aef-863e5be6594a (old id 153819)
date added to LUP
2007-07-11 14:45:49
date last changed
2017-09-03 03:39:54
@article{b8294c20-8aa2-4393-9aef-863e5be6594a,
  abstract     = {A differential scanning calorimetric and sorption calorimetric study of two alkyl maltosides, C(8)G(2) and C(10)G(2), was performed. In the dry state, C(8)G(2) and C(10)G(2) do not form solid crystals but undergo a glass transition upon temperature change. The glass is partly ordered and has the same lamellar structure as the liquid crystals formed by the two maltosides. To reflect the presence of the glass transition and the structure, the terms "glassy crystals" and "glassy liquid crystals" can be used. A mechanism of the relaxation of the glassy crystals based on the results of small-angle X-ray scattering experiments is proposed. Experiments on water sorption showed that the glassy crystals turn into lyotropic liquid crystals upon sorption of water at constant temperature. This isothermal glass transition can be characterized by water content and change of partial molar enthalpy of mixing of water. A method to calculate the phase diagram liquid crystals-glassy liquid crystals is proposed.},
  author       = {Kocherbitov, Vitaly and Söderman, Olle},
  issn         = {0743-7463},
  language     = {eng},
  number       = {8},
  pages        = {3056--3061},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Glassy crystalline state and water sorption of alkyl maltosides},
  url          = {http://dx.doi.org/10.1021/la035553c},
  volume       = {20},
  year         = {2004},
}