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Thermal transitions of DODAB vesicular dispersions

Cocquyt, J; Olsson, Ulf LU ; Olofsson, Gerd LU and Van der Meeren, P (2005) In Colloid and Polymer Science 283(12). p.1376-1381
Abstract
Two endothermic transitions, at 36 degrees C and 44 degrees C, were observed with differential scanning calorimetry (DSC) upon heating dioctadecyldimethylammonium bromide vesicle dispersions that were equilibrated below 15 degrees C while in samples kept at 25 degrees C there was only the transition at 44 degrees C, which was shown to be the gel to liquid-crystalline transition by H-1-NMR measurements. The transition at 36 degrees C was reversed in an exothermic transition around 13 degrees C upon cooling. The slowness of this transition at ambient temperatures suggests that the presence of the transition at 36 degrees C in a DSC upscan depends strongly on the sample history.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Colloid and Polymer Science
volume
283
issue
12
pages
1376 - 1381
publisher
Springer
external identifiers
  • wos:000232778200015
  • scopus:27744565710
ISSN
0303-402X
DOI
10.1007/s00396-005-1347-9
language
English
LU publication?
yes
id
35917e1a-1576-48b3-ac82-5a0aba6a0f12 (old id 157272)
date added to LUP
2007-07-11 09:02:08
date last changed
2017-11-05 03:46:17
@article{35917e1a-1576-48b3-ac82-5a0aba6a0f12,
  abstract     = {Two endothermic transitions, at 36 degrees C and 44 degrees C, were observed with differential scanning calorimetry (DSC) upon heating dioctadecyldimethylammonium bromide vesicle dispersions that were equilibrated below 15 degrees C while in samples kept at 25 degrees C there was only the transition at 44 degrees C, which was shown to be the gel to liquid-crystalline transition by H-1-NMR measurements. The transition at 36 degrees C was reversed in an exothermic transition around 13 degrees C upon cooling. The slowness of this transition at ambient temperatures suggests that the presence of the transition at 36 degrees C in a DSC upscan depends strongly on the sample history.},
  author       = {Cocquyt, J and Olsson, Ulf and Olofsson, Gerd and Van der Meeren, P},
  issn         = {0303-402X},
  language     = {eng},
  number       = {12},
  pages        = {1376--1381},
  publisher    = {Springer},
  series       = {Colloid and Polymer Science},
  title        = {Thermal transitions of DODAB vesicular dispersions},
  url          = {http://dx.doi.org/10.1007/s00396-005-1347-9},
  volume       = {283},
  year         = {2005},
}