Homogenization of Maritime Pine Wood Color by Alkaline Hydrogen Peroxide Treatment

Coatings

Jérémy Mehats¹  Stéphane Grelier¹  Etienne Grau¹  Laurent Castets² 

[1] CNRS, University of Bordeaux, Bordeaux INP, LCPO, UMR 5629, 33600 Pessac, France;Gascogne Bois Escource, Route de Cap de Pin, 40210 Escource, France;

关键词: heartwood;    sapwood;    color homogenization;    hydrogen peroxide;   

DOI  :  10.3390/coatings11070839

来源: DOAJ

【 摘 要 】

The color of maritime pine wood is a critical parameter for manufacturing high added value materials (wood flooring or wood paneling for indoor applications). Actually, the color inhomogeneity between heartwood (Hw) and sapwood (Sw) can lead to a depreciation of the wood value and, therefore, to financial losses for wood products companies. In this article, the development of a color homogenization process based on alkaline hydrogen peroxide chemistry was studied. Maritime pine heartwood and sapwood powders were used to facilitate the chemical characterizations and colorimetric analyses by the CIEL*a*b* system. Brighter materials were obtained after the treatment by reducing significantly the color difference. The chemical modifications of wood surface were characterized by infrared spectroscopy analyses. The color evolution of the material overtime was also studied thanks to an accelerated ageing under UV irradiation. It was demonstrated that even if a color reversion occurred by oxidation, the color remained homogeneous between heartwood and sapwood.

【 授权许可】

Unknown