Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids

Abstract To discuss the factors that greatly affect the stabilization and destabilization of the conformation of lignin caused by changes in temperature and/or swelling, the temperature dependence of the loss tangent (tanδ) of the sample given the different cooling rates and the changes in the stora...

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Main Authors: Yuka Miyoshi, Ai Sakae, Nao Arimura, Keisuke Kojiro, Yuzo Furuta
Format: Article
Language:English
Published: SpringerOpen 2020-02-01
Series:Journal of Wood Science
Subjects:
Online Access:https://doi.org/10.1186/s10086-020-1856-7
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spelling doaj-cdc5b8d6bc874eb69b11d426491c17852021-02-07T12:29:27ZengSpringerOpenJournal of Wood Science1435-02111611-46632020-02-0166111010.1186/s10086-020-1856-7Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquidsYuka Miyoshi0Ai Sakae1Nao Arimura2Keisuke Kojiro3Yuzo Furuta4Wood Physics Laboratory, Department of Wood Properties and Processing, Forestry and Forest Products Research Institute, Forest Research and Management OrganizationDivision of Environmental Sciences, Graduate School of Life and Environmental Sciences, Kyoto Prefectural UniversityDivision of Environmental Sciences, Graduate School of Life and Environmental Sciences, Kyoto Prefectural UniversityDivision of Environmental Sciences, Graduate School of Life and Environmental Sciences, Kyoto Prefectural UniversityDivision of Environmental Sciences, Graduate School of Life and Environmental Sciences, Kyoto Prefectural UniversityAbstract To discuss the factors that greatly affect the stabilization and destabilization of the conformation of lignin caused by changes in temperature and/or swelling, the temperature dependence of the loss tangent (tanδ) of the sample given the different cooling rates and the changes in the storage elastic modulus (E′) and the loss elastic modulus (Eʺ) over time during the swelling process were measured using the untreated or the acetylated wood samples swollen by water or organic liquids. The difference in the glass transition temperature of lignin mainly affects the degree of the destabilization of the conformation of lignin caused by quenching in the untreated and acetylated wood samples. The changes in E′ and Eʺ during swelling process were significantly different between the liquids in the untreated wood sample. The differences of E′ and Eʺ in the different liquids were considered to be caused by the balance of the stabilization depending on the swelling amount and passage of time and the destabilization due to the rapid swelling.https://doi.org/10.1186/s10086-020-1856-7Organic liquidSwelling rateDestabilizationConformation of ligninQuenching
collection DOAJ
language English
format Article
sources DOAJ
author Yuka Miyoshi
Ai Sakae
Nao Arimura
Keisuke Kojiro
Yuzo Furuta
spellingShingle Yuka Miyoshi
Ai Sakae
Nao Arimura
Keisuke Kojiro
Yuzo Furuta
Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids
Journal of Wood Science
Organic liquid
Swelling rate
Destabilization
Conformation of lignin
Quenching
author_facet Yuka Miyoshi
Ai Sakae
Nao Arimura
Keisuke Kojiro
Yuzo Furuta
author_sort Yuka Miyoshi
title Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids
title_short Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids
title_full Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids
title_fullStr Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids
title_full_unstemmed Dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids
title_sort dynamic viscoelastic properties of wood and acetylated wood in nonequilibrium states swollen by water or organic liquids
publisher SpringerOpen
series Journal of Wood Science
issn 1435-0211
1611-4663
publishDate 2020-02-01
description Abstract To discuss the factors that greatly affect the stabilization and destabilization of the conformation of lignin caused by changes in temperature and/or swelling, the temperature dependence of the loss tangent (tanδ) of the sample given the different cooling rates and the changes in the storage elastic modulus (E′) and the loss elastic modulus (Eʺ) over time during the swelling process were measured using the untreated or the acetylated wood samples swollen by water or organic liquids. The difference in the glass transition temperature of lignin mainly affects the degree of the destabilization of the conformation of lignin caused by quenching in the untreated and acetylated wood samples. The changes in E′ and Eʺ during swelling process were significantly different between the liquids in the untreated wood sample. The differences of E′ and Eʺ in the different liquids were considered to be caused by the balance of the stabilization depending on the swelling amount and passage of time and the destabilization due to the rapid swelling.
topic Organic liquid
Swelling rate
Destabilization
Conformation of lignin
Quenching
url https://doi.org/10.1186/s10086-020-1856-7
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