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Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood

The thermal degradation reactivities of hemicellulose and cellulose in wood cell walls are significantly different from the thermal degradation behavior of the respective isolated components. Furthermore, the degradation of Japanese cedar (Cryptomeria japonica, a softwood) is distinct from that of J...

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Main Authors: Wang, Jiawei, Minami, Eiji, Mohd. Asmadi, Mohd. Asmadi, Kawamoto, Haruo
Format: Article
Language:English
Published: Springer Japan 2021
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/95112/1/MohdAsmadi2021_ThermalDegradationOfHemicelluloseAndCelluloseInBallMilled.pdf
http://eprints.utm.my/id/eprint/95112/
http://dx.doi.org/10.1186/s10086-021-01962-y
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spelling my.utm.951122022-04-29T22:24:10Z http://eprints.utm.my/id/eprint/95112/ Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood Wang, Jiawei Minami, Eiji Mohd. Asmadi, Mohd. Asmadi Kawamoto, Haruo TP Chemical technology The thermal degradation reactivities of hemicellulose and cellulose in wood cell walls are significantly different from the thermal degradation behavior of the respective isolated components. Furthermore, the degradation of Japanese cedar (Cryptomeria japonica, a softwood) is distinct from that of Japanese beech (Fagus crenata, a hardwood). Lignin and uronic acid are believed to play crucial roles in governing this behavior. In this study, the effects of ball milling for various durations of time on the degradation reactivities of cedar and beech woods were evaluated based on the recovery rates of hydrolyzable sugars from pyrolyzed wood samples. The applied ball-milling treatment cleaved the lignin ß-ether bonds and reduced the crystallinity of cellulose, as determined by X-ray diffraction. Both xylan and glucomannan degraded in a similar temperature range, although the isolated components exhibited different reactivities because of the catalytic effect of uronic acid bound to the xylose chains. These observations can be explained by the more homogeneous distribution of uronic acid in the matrix of cell walls as a result of ball milling. As observed for holocelluloses, cellulose in the ball-milled woods degraded in two temperature ranges (below 320 °C and above); a significant amount of cellulose degraded in the lower temperature range, which significantly changed the shapes of the thermogravimetric curves. This report compares the results obtained for cedar and beech woods, and discusses them in terms of the thermal degradation of the matrix and cellulose microfibrils in wood cell walls and role of lignin. Such information is crucial for understanding the pyrolysis and heat treatment of wood. Springer Japan 2021 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/95112/1/MohdAsmadi2021_ThermalDegradationOfHemicelluloseAndCelluloseInBallMilled.pdf Wang, Jiawei and Minami, Eiji and Mohd. Asmadi, Mohd. Asmadi and Kawamoto, Haruo (2021) Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood. Journal of Wood Science, 67 (1). p. 32. ISSN 1435-0211 http://dx.doi.org/10.1186/s10086-021-01962-y
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Wang, Jiawei
Minami, Eiji
Mohd. Asmadi, Mohd. Asmadi
Kawamoto, Haruo
Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood
description The thermal degradation reactivities of hemicellulose and cellulose in wood cell walls are significantly different from the thermal degradation behavior of the respective isolated components. Furthermore, the degradation of Japanese cedar (Cryptomeria japonica, a softwood) is distinct from that of Japanese beech (Fagus crenata, a hardwood). Lignin and uronic acid are believed to play crucial roles in governing this behavior. In this study, the effects of ball milling for various durations of time on the degradation reactivities of cedar and beech woods were evaluated based on the recovery rates of hydrolyzable sugars from pyrolyzed wood samples. The applied ball-milling treatment cleaved the lignin ß-ether bonds and reduced the crystallinity of cellulose, as determined by X-ray diffraction. Both xylan and glucomannan degraded in a similar temperature range, although the isolated components exhibited different reactivities because of the catalytic effect of uronic acid bound to the xylose chains. These observations can be explained by the more homogeneous distribution of uronic acid in the matrix of cell walls as a result of ball milling. As observed for holocelluloses, cellulose in the ball-milled woods degraded in two temperature ranges (below 320 °C and above); a significant amount of cellulose degraded in the lower temperature range, which significantly changed the shapes of the thermogravimetric curves. This report compares the results obtained for cedar and beech woods, and discusses them in terms of the thermal degradation of the matrix and cellulose microfibrils in wood cell walls and role of lignin. Such information is crucial for understanding the pyrolysis and heat treatment of wood.
format Article
author Wang, Jiawei
Minami, Eiji
Mohd. Asmadi, Mohd. Asmadi
Kawamoto, Haruo
author_facet Wang, Jiawei
Minami, Eiji
Mohd. Asmadi, Mohd. Asmadi
Kawamoto, Haruo
author_sort Wang, Jiawei
title Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood
title_short Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood
title_full Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood
title_fullStr Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood
title_full_unstemmed Thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood
title_sort thermal degradation of hemicellulose and cellulose in ball-milled cedar and beech wood
publisher Springer Japan
publishDate 2021
url http://eprints.utm.my/id/eprint/95112/1/MohdAsmadi2021_ThermalDegradationOfHemicelluloseAndCelluloseInBallMilled.pdf
http://eprints.utm.my/id/eprint/95112/
http://dx.doi.org/10.1186/s10086-021-01962-y
_version_ 1732945433628508160
score 13.211869

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