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European Journal of Wood and Wood Products

Erschienen in:

19.01.2018 | Original

Wood nails to fix softwoods: characterization of structural deformation and lignin modification

verfasst von: H. Korte, G. Koch, K. C. Krause, T. Koddenberg, S. Siemers

Erschienen in: European Journal of Wood and Wood Products | Ausgabe 3/2018

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Abstract

Softwoods can be nailed with high density solid wood like Santos Rosewood (Machaerium scleroxylon) or nails made of densified laminated beech wood composite by hammering or shooting, for example with air nail guns, without pre-drilling. Shooting with about 30 m/s causes friction between nail surface and softwood matrix, heating up the interface to temperatures high enough to soften lignin. Re-condensation of softened lignin causes wood welding which doubles pull out strength in comparison to wood nails fixed without wood welding. Changes in lignin UV-absorption within the single cell wall layer and deformation of main anatomical features of spruce wood tissue are characterized by scanning UV microspectrophotometry (UMSP) whereas structural deformations of spruce wood tissue are revealed by X-ray micro-computed tomography (µ-CT).

Vorheriger Artikel A theoretical model developed for predicting nail withdrawal load from wood by mechanics

Nächster Artikel Production and characterization of particleboards from cork-rich Quercus cerris bark

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Titel: Wood nails to fix softwoods: characterization of structural deformation and lignin modification
verfasst von: H. Korte
G. Koch
K. C. Krause
T. Koddenberg
S. Siemers
Publikationsdatum: 19.01.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: European Journal of Wood and Wood Products / Ausgabe 3/2018
Print ISSN: 0018-3768
Elektronische ISSN: 1436-736X
DOI: https://doi.org/10.1007/s00107-018-1288-x

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