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Hyperspectral imaging and chemometrics reveal wood acetylation on different spatial scales

Mäkelä, Mikko and Altgen, Michael and Belt, Tiina and Rautkari, Lauri (2021). Hyperspectral imaging and chemometrics reveal wood acetylation on different spatial scales. Journal of Materials Science. 56 , 5053-5066
[Research article]

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Abstract

Acetylation is a chemical treatment method commonly used to improve the hygroscopic properties of wood. Although acetylation has been industrially used for decades, its effects on the different hierarchical structures of wood are still poorly understood. In the laboratory, acetylation is generally measured gravimetrically. Weighing a sample before and after the modification procedure provides an indirect measure of the degree of acetylation within the entire sample but does not provide detailed information on the different structural regions of wood. Here, we determined acetylation of wood surfaces using hyperspectral near-infrared image regression. Our results show significant differences in the acetylation of earlywood and latewood, which suggests different durations for complete acetylation of earlywood and latewood cells. We have also illustrated our findings on the wood cell level based on the chemical differences in earlywood and latewood cell walls using cluster analysis of Raman images. These findings are an important step in understanding how chemical treatment affects the different hierarchical structures of wood on different spatial scales.

Authors/Creators:Mäkelä, Mikko and Altgen, Michael and Belt, Tiina and Rautkari, Lauri
Title:Hyperspectral imaging and chemometrics reveal wood acetylation on different spatial scales
Series Name/Journal:Journal of Materials Science
Year of publishing :2021
Volume:56
Page range:5053-5066
Number of Pages:14
Publisher:SPRINGER
ISSN:0022-2461
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
URN:NBN:urn:nbn:se:slu:epsilon-p-109506
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109506
Additional ID:
Type of IDID
DOI10.1007/s10853-020-05597-0
Web of Science (WoS)000597436100002
ID Code:21201
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:12 Jan 2021 08:23
Metadata Last Modified:12 Jan 2021 08:31

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