Interior wood joints by mechanical fusion welding of wood surfaces.

Gfeller, B.; Lehmann, Martin; Properzi, M.; Pichelin, Frédéric; Zanetti, M.; Pizzi, A.; Delmotte, L. (2004). Interior wood joints by mechanical fusion welding of wood surfaces. Forest Products Journal, 54(7/8), 72 - 79.

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Mechanically induced wood fusion welding, without any adhesive, is shown here to rapidly yield wood joints that satisfy the relevant requirements for structural application. The mechanism of mechanically induced vibrational wood fusion welding is shown to be due mostly to the melting and flowing of amorphous cells-interconnecting polymer material in the structure of wood` mainly lignin, but also some hemicelluloses. This causes the partial detachment ("ungluing") of long wood cells (wood fibers) and the formation of an entanglement network drowned in a matrix of melted material, which then solidifies. This creates a wood cells entanglement network composite with a molten lignin polymer matrix. During the welding period, some of the detached wood fibers that are not being held anymore by the interconnecting material are pushed out of the joint as excess fiber. Cross-linking chemical reactions of lignin and of carbohydrates-derived furfural also occur. Their presence has been identified

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology BFH Centres and strategic thematic fields > BFH Centre for Wood - Resource and Material School of Architecture, Wood and Civil Engineering > Institut for Building Materials and Biobased Products IBBM
Name:	Gfeller, B.; Lehmann, Martin0000-0002-0813-7023; Properzi, M.; Pichelin, Frédéric0000-0003-3856-6707; Zanetti, M.; Pizzi, A. and Delmotte, L.
Subjects:	Q Science > Q Science (General) T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General)
ISSN:	0015-7473
Language:	English
Submitter:	Sally Haddad
Date Deposited:	12 May 2020 11:30
Last Modified:	18 Dec 2020 13:30
Uncontrolled Keywords:	Welding Forest products industry Timber joints Wood products Forest products
URI:	https://arbor.bfh.ch/id/eprint/11535