2024-03-28T11:45:23Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00022969
2023-01-16T04:11:34Z
643:666:667
Hygrothermal recovery of compression wood in relation to elastic growth stress and its physicochemical characteristics
Matsuo, Ueda Miyuki
67786
Niimi, Ginji
67787
Sujan, K. C.
67788
Yoshida, Masato
67789
Yamamoto, Hiroyuki
67790
Hygrothermal recovery (HTR), the dimensional changes in wood induced by hygrothermal treatment, was investigated using both compression and normal wood of sugi (Cryptomeria japonica). The elastic released strain of growth stress was measured on living tree surfaces; subsequently, the specimens were taken from the same position to measure HTR. HTR was measured as dimensional changes due to treatment at 20, 40, 60, 80, and 100 °C in hot water ranging from 200 min to 177 days. The intensity of HTR had a positive relationship with elastic released strain of growth stress. This result suggests that HTR is the relaxation of the viscoelastic component of growth stress accumulated during the maturation process of trees. The rate of HTR clearly showed a time–temperature dependency: higher at higher treatment temperatures and lower at lower treatment temperatures. Based on kinetic analysis, the apparent activation energy (Ea) was calculated as 407 kJ/mol, which is similar to the published Ea of lignin softening implying that the HTR is a lignin-related phenomenon.
journal article
Springer
2016-09
application/pdf
Journal of Materials Science
17
51
7956
7965
http://doi.org/10.1007/s10853-016-0065-7
http://hdl.handle.net/2237/25150
0022-2461
https://nagoya.repo.nii.ac.jp/record/22969/files/20160510_repository.pdf
eng
https://doi.org/10.1007/s10853-016-0065-7
The final publication is available at Springer via http://doi.org/10.1007/s10853-016-0065-7