Changes in the surface properties of wood due to sanding

• Published in: Holzforschung Vol. 58; no. 3; pp. 246 - 251
• Main Authors: Sinn, G., Gindl, M., Reiterer, A., Stanzl-Tschegg, S.
• Format: Journal Article
• Language: English
• Published: Berlin Walter de Gruyter 12.05.2004; New York, NY de Gruyter
• Subjects: Applied sciences; Exact sciences and technology; Polymer industry, paints, wood; Properties and testing; Wood; Wood. Paper. Non wovens; Grain size; Scanning electron microscopy; Roughness; Hardwood; Softwood; Fagaceae; Experimental study; Free energy; Dicotyledones; Sanding; Angiospermae; Gymnospermae; Surface properties; Coniferales; Spermatophyta; Picea abies; Surface energy; Fagus sylvatica; X-ray photoelectron spectra
• ISSN: 0018-3830; 1437-434X
• DOI: 10.1515/HF.2004.038

Spruce and beech wood specimens were sanded with four different grain sizes. Surface morphological and chemical changes were determined by roughness measurement, surface free energy determination according to acid-base theory and X-ray photoelectron spectroscopy. An analysis model was proposed to describe chemical changes due to sanding and the data were analysed according to it. It could be shown that spruce and beech behave similarly over a wide range and that chemical changes are non-linear functions of grain size and thus surface roughness. A maximum of surface free energy and a maximum of carbon C1s sub-peak ratio (ratio of carbon bonded to a single non-carbonyl oxygen to carbon bonded only to hydrogen or other carbon atoms) was found for middle grain size.