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Published in: European Journal of Wood and Wood Products 2/2023

01-11-2022 | Original Article

Effect of steaming and furfuryl alcohol impregnation pre-treatments on the spring back, set recovery and thermal degradation of densified wood of three tropical hardwood species

Authors: Carolina Tenorio, Roger Moya, Ricardo Starbird-Perez

Published in: European Journal of Wood and Wood Products | Issue 2/2023

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Abstract

Alnus acuminata, Vochysia ferruginea and Vochysia guatemalensis, low-density species, have been previously studied due to their potential in the thermomechanical densification process. However, their spring back and set recovery values are reported to be high. Therefore, the objective of this work was to investigate and evaluate the effects of steaming and furfuryl alcohol impregnation pre-treatments on the spring back, set recovery, and thermal degradation of densified wood of these three tropical hardwood species. The results indicate that both steaming and furfurylation pre-treatments improved the dimensional stability of the densified wood of these three species. The wood densified with furfurylation pre-treatment presented higher spring back values (greater than 3%) but lower set recovery (lower than 5%) than wood densified with steaming pre-treatment. In addition, compared with the un-densified wood, the DTG/TG curves of the three species showed that the furfurylation-pre-treatment presented thermal stability and chemical modification related to the structure of hemicelluloses and the amorphous zones of cellulose and lignin, which was confirmed by the FTIR spectrum. In the wood densified with steaming pre-treatment, a modification of hemicellulose was evident in the FTIR data, resulting in a displacement of the curve that was only observed at higher temperatures, making it more thermally stable. The densified wood of V. ferruginea and V. guatemalensis presented lower spring back and set recovery values in comparison to the wood of A. acuminata regardless of the treatment applied, suggesting that these two species present better conditions for the densification process.

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Metadata
Title
Effect of steaming and furfuryl alcohol impregnation pre-treatments on the spring back, set recovery and thermal degradation of densified wood of three tropical hardwood species
Authors
Carolina Tenorio
Roger Moya
Ricardo Starbird-Perez
Publication date
01-11-2022
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Wood and Wood Products / Issue 2/2023
Print ISSN: 0018-3768
Electronic ISSN: 1436-736X
DOI
https://doi.org/10.1007/s00107-022-01890-8

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