Microstructural and physical aspects of heat treated wood. Part 2. Hardwoods

Heat treatment of wood is an effective method to improve the dimensional stability and durability against biodegradation. Optimisation of a two-stage heat treatment process at relatively mild conditions (<200° C) and its effect on the anatomical structure of hardwoods were investigated by means o...
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Autor*in:	M.J. Boonstra [verfasserIn] J.F. Rijsdijk [verfasserIn] C. Sander [verfasserIn] E. Kegel [verfasserIn] B. Tjeerdsma [verfasserIn] H. Militz [verfasserIn] J. Van Acker [verfasserIn] M. Stevens [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch ; Spanisch

Erschienen:	2014

Schlagwörter:	Wood modification heat treatment hardwood microscopy.

Übergeordnetes Werk:	In: Maderas: Ciencia y Tecnología - Universidad del Bío-Bío, 2019, 8(2014), 3
Übergeordnetes Werk:	volume:8 ; year:2014 ; number:3

Links:	Link aufrufen Link aufrufen Journal toc Journal toc

Katalog-ID:	DOAJ097623911

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callnumber-first	S - Agriculture
author	M.J. Boonstra
spellingShingle	M.J. Boonstra misc SD1-669.5 misc TS1-2301 misc Wood modification misc heat treatment misc hardwood misc microscopy. misc Forestry misc Manufactures Microstructural and physical aspects of heat treated wood. Part 2. Hardwoods
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topic_title	SD1-669.5 TS1-2301 Microstructural and physical aspects of heat treated wood. Part 2. Hardwoods Wood modification heat treatment hardwood microscopy
topic	misc SD1-669.5 misc TS1-2301 misc Wood modification misc heat treatment misc hardwood misc microscopy. misc Forestry misc Manufactures
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title	Microstructural and physical aspects of heat treated wood. Part 2. Hardwoods
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title_full	Microstructural and physical aspects of heat treated wood. Part 2. Hardwoods
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title_sort	microstructural and physical aspects of heat treated wood. part 2. hardwoods
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title_auth	Microstructural and physical aspects of heat treated wood. Part 2. Hardwoods
abstract	Heat treatment of wood is an effective method to improve the dimensional stability and durability against biodegradation. Optimisation of a two-stage heat treatment process at relatively mild conditions (<200° C) and its effect on the anatomical structure of hardwoods were investigated by means of a light and scanning electron microscopic analysis. Hardwood species such as beech and poplar, were predominantly sensitive to collaps of the vessels and some deformation of the libriform fibres directly near the vessels. In treated beech and birch radial cracks were observed near the rays. Optimisation of the heat treatment process conditions including the application of a steam hydro thermolysis stage reduced such damages to a minimum. Broken cell walls perpendicular to the fibre direction resulting in transverse ruptures has been noticed in heat treated hardwood species. This contributes to abrupt fractures of treated wood as observed in bending tests which can lead to considerably different failure behavior after impact of mechanical stress. In some treated hardwood species maceration (small cracks between tracheids) was noticed after heat treatment. Heat treatment did not reveal damage to the ray parenchyma pit membranes, bordered pits and large window pit membranes; and the margo fibrils appeared without damage.
abstractGer	Heat treatment of wood is an effective method to improve the dimensional stability and durability against biodegradation. Optimisation of a two-stage heat treatment process at relatively mild conditions (<200° C) and its effect on the anatomical structure of hardwoods were investigated by means of a light and scanning electron microscopic analysis. Hardwood species such as beech and poplar, were predominantly sensitive to collaps of the vessels and some deformation of the libriform fibres directly near the vessels. In treated beech and birch radial cracks were observed near the rays. Optimisation of the heat treatment process conditions including the application of a steam hydro thermolysis stage reduced such damages to a minimum. Broken cell walls perpendicular to the fibre direction resulting in transverse ruptures has been noticed in heat treated hardwood species. This contributes to abrupt fractures of treated wood as observed in bending tests which can lead to considerably different failure behavior after impact of mechanical stress. In some treated hardwood species maceration (small cracks between tracheids) was noticed after heat treatment. Heat treatment did not reveal damage to the ray parenchyma pit membranes, bordered pits and large window pit membranes; and the margo fibrils appeared without damage.
abstract_unstemmed	Heat treatment of wood is an effective method to improve the dimensional stability and durability against biodegradation. Optimisation of a two-stage heat treatment process at relatively mild conditions (<200° C) and its effect on the anatomical structure of hardwoods were investigated by means of a light and scanning electron microscopic analysis. Hardwood species such as beech and poplar, were predominantly sensitive to collaps of the vessels and some deformation of the libriform fibres directly near the vessels. In treated beech and birch radial cracks were observed near the rays. Optimisation of the heat treatment process conditions including the application of a steam hydro thermolysis stage reduced such damages to a minimum. Broken cell walls perpendicular to the fibre direction resulting in transverse ruptures has been noticed in heat treated hardwood species. This contributes to abrupt fractures of treated wood as observed in bending tests which can lead to considerably different failure behavior after impact of mechanical stress. In some treated hardwood species maceration (small cracks between tracheids) was noticed after heat treatment. Heat treatment did not reveal damage to the ray parenchyma pit membranes, bordered pits and large window pit membranes; and the margo fibrils appeared without damage.
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title_short	Microstructural and physical aspects of heat treated wood. Part 2. Hardwoods
url	https://doaj.org/article/e3e41a9445ad4755a327ddf74b66b0a8 https://revistas.ubiobio.cl/index.php/MCT/article/view/1471 https://doaj.org/toc/0717-3644 https://doaj.org/toc/0718-221X
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Microstructural and physical aspects of heat treated wood. Part 2. Hardwoods

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