TY - JOUR
T1 - Colour alteration and chemistry changes in oak wood (Quercus pedunculata Ehrh) during plain vacuum drying
AU - Sandoval-Torres, Sadoth
AU - Jomaa, Wahbi
AU - Marc, Françoise
AU - Puiggali, Jean Rodolphe
N1 - Funding Information:
This work was supported by The National Council for Science and Technology of Mexico (CONACYT) and SFERE-France. Sadoth Sandoval-Torres PhD is thankful to Instituto Politécnico Nacional (CIIDIR Oaxaca) for its support.
PY - 2012/1
Y1 - 2012/1
N2 - The formation of chromophore groups from a phenolic compound oxidized with air and the formation of dark materials from hydrolysable extractives are considered as causes of discoloration. In this work, the colour changes, antioxidant capacity, and Fourier Transform Infrared Spectra of dust-wood are investigated in European oak wood under different plain vacuum drying conditions. The conductive heat source is maintained at four temperatures (46, 61, 70 and 80°C), and vacuum in the chamber is controlled at three different intervals (60-100, 150-200, and 250-300 mbar). Drying kinetics and temperature profiles are presented. The results suggest that degradation of extractives allows yellowing in wood and temperature improves lightness under these special drying conditions (plain vacuum). Furthermore, the presence of carbonyl groups in surfaces is related to the loss in antioxidant potency.
AB - The formation of chromophore groups from a phenolic compound oxidized with air and the formation of dark materials from hydrolysable extractives are considered as causes of discoloration. In this work, the colour changes, antioxidant capacity, and Fourier Transform Infrared Spectra of dust-wood are investigated in European oak wood under different plain vacuum drying conditions. The conductive heat source is maintained at four temperatures (46, 61, 70 and 80°C), and vacuum in the chamber is controlled at three different intervals (60-100, 150-200, and 250-300 mbar). Drying kinetics and temperature profiles are presented. The results suggest that degradation of extractives allows yellowing in wood and temperature improves lightness under these special drying conditions (plain vacuum). Furthermore, the presence of carbonyl groups in surfaces is related to the loss in antioxidant potency.
UR - http://www.scopus.com/inward/record.url?scp=84855810525&partnerID=8YFLogxK
U2 - 10.1007/s00226-010-0381-z
DO - 10.1007/s00226-010-0381-z
M3 - Artículo
SN - 0043-7719
VL - 46
SP - 177
EP - 191
JO - Wood Science and Technology
JF - Wood Science and Technology
IS - 1-3
ER -