Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Sorption and thermodynamic properties of cork from the 35ºC and 50ºC isotherms
Year:2012
Research Areas
  • Engineering
Information
Abstract
Because of its characteristics, cork currently has no substitute in the bottle stopper industry for high quality wines and champagnes. Few studies have been conducted on water-cork interactions, and especially on the thermodynamic behaviour of cork. The hygroscopic and thermodynamic properties of two cork samples of the same quality, harvested in 1968 and 2006, were studied to determine any differences in behaviour over time. The 35°C and 50°C isotherms were plotted following the saturated salts method and fitted using the GAB model. The isotherms were compared by means of hysteresis coefficients. The infrared spectra were recorded to analyse chemical changes in the cell wall, and the thermodynamic parameters were determined using the integration method based on the Clausius- Clapeyron equation. No significant differences were observed between the equilibrium moisture content obtained in the two samples, although the monolayer saturation moisture content was significantly lower in the older cork. In both types of cork, as also occurs with wood, the points of inflexion where multilayer sorption begins to predominate over monolayer sorption occurred at very similar values, at around 31- 35% relative humidity (RH). In terms of thermodynamic properties, the net isosteric heat curves were similar to those obtained for wood, and the bond energy in the recently harvested cork was lower than in the older cork.
International
Si
JCR
Si
Title
Bois Et Forets Des Tropiques
ISBN
0006-579X
Impact factor JCR
0,439
Impact info
Volume
311
Journal number
1
From page
63
To page
74
Month
MARZO
Ranking
45/59 FORESTRY (SCI)
Participants
  • Autor: Francisco Garcia Fernandez (UPM)
  • Autor: Paloma de Palacios De Palacios (UPM)
  • Autor: Luis Garcia Esteban (UPM)
  • Autor: Alberto García Iruela (UPM)
  • Autor: Jose Ramon Gonzalez Adrados (UPM)
  • Autor: Jose Vicente Lopez Alvarez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Tecnología de la Madera y el Corcho
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