Advanced

Transport properties of water in hydroxypropyl methylcellulose

Trotzig, Charlotte LU ; Abrahmsen-Alami, Susanna and Maurer, Frans LU (2009) In European Polymer Journal 45(10). p.2812-2820
Abstract
The relation between the self-diffusion coefficient, D-self, of water and the free volume hole size, V-h, has been investigated in a hydroxypropyl methylcellulose (HPMC)-water system in the water content range 0.08-0.36 w/w, at room temperature. Furthermore, the thermal properties of the water in the HPMC-water system, as measured with differential scanning calorimetry (DSC) and the tensile storage, E', and tensile loss, E '', moduli, of the HPMC-water systems, as determined with dynamic mechanical analysis (DMA), have been probed. Pulsed-field gradient nuclear magnetic resonance (PFG NMR) was used to measure the D-self of water and positron annihilation lifetime spectroscopy (PALS) was used to measure the ortho-Positronium (o-Ps) lifetime... (More)
The relation between the self-diffusion coefficient, D-self, of water and the free volume hole size, V-h, has been investigated in a hydroxypropyl methylcellulose (HPMC)-water system in the water content range 0.08-0.36 w/w, at room temperature. Furthermore, the thermal properties of the water in the HPMC-water system, as measured with differential scanning calorimetry (DSC) and the tensile storage, E', and tensile loss, E '', moduli, of the HPMC-water systems, as determined with dynamic mechanical analysis (DMA), have been probed. Pulsed-field gradient nuclear magnetic resonance (PFG NMR) was used to measure the D-self of water and positron annihilation lifetime spectroscopy (PALS) was used to measure the ortho-Positronium (o-Ps) lifetime in the HPMC-water system. The glass transition temperature of the HPMC was found to be reduced by the water to room temperature in the water content range 0.10-0.15 w/w. The relation between ln D-self of water and the inverse free volume hole size of the HPMC-water system was non-linear. Furthermore, the PALS measurements showed that molecular water co-existed with water clusters in the HPMC-water system. (C) 2009 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Water clusters, Self-diffusion coefficient, Free volume, Positron, annihilation, NMR
in
European Polymer Journal
volume
45
issue
10
pages
2812 - 2820
publisher
Elsevier
external identifiers
  • wos:000273019600009
  • scopus:70249136196
ISSN
0014-3057
DOI
10.1016/j.eurpolymj.2009.07.010
language
English
LU publication?
yes
id
88f30a76-f2c0-483b-afa1-9a4fe70efdcb (old id 1567949)
date added to LUP
2010-03-24 13:13:49
date last changed
2017-01-01 06:25:32
@article{88f30a76-f2c0-483b-afa1-9a4fe70efdcb,
  abstract     = {The relation between the self-diffusion coefficient, D-self, of water and the free volume hole size, V-h, has been investigated in a hydroxypropyl methylcellulose (HPMC)-water system in the water content range 0.08-0.36 w/w, at room temperature. Furthermore, the thermal properties of the water in the HPMC-water system, as measured with differential scanning calorimetry (DSC) and the tensile storage, E', and tensile loss, E '', moduli, of the HPMC-water systems, as determined with dynamic mechanical analysis (DMA), have been probed. Pulsed-field gradient nuclear magnetic resonance (PFG NMR) was used to measure the D-self of water and positron annihilation lifetime spectroscopy (PALS) was used to measure the ortho-Positronium (o-Ps) lifetime in the HPMC-water system. The glass transition temperature of the HPMC was found to be reduced by the water to room temperature in the water content range 0.10-0.15 w/w. The relation between ln D-self of water and the inverse free volume hole size of the HPMC-water system was non-linear. Furthermore, the PALS measurements showed that molecular water co-existed with water clusters in the HPMC-water system. (C) 2009 Elsevier Ltd. All rights reserved.},
  author       = {Trotzig, Charlotte and Abrahmsen-Alami, Susanna and Maurer, Frans},
  issn         = {0014-3057},
  keyword      = {Water clusters,Self-diffusion coefficient,Free volume,Positron,annihilation,NMR},
  language     = {eng},
  number       = {10},
  pages        = {2812--2820},
  publisher    = {Elsevier},
  series       = {European Polymer Journal},
  title        = {Transport properties of water in hydroxypropyl methylcellulose},
  url          = {http://dx.doi.org/10.1016/j.eurpolymj.2009.07.010},
  volume       = {45},
  year         = {2009},
}