Arnaud Maxime Cheumani-Yona (Author), Franc Budija (Author), David Hrastnik (Author), Matjaž Pavlič (Author), Pavel Pori (Author), Črtomir Tavzes (Author), Marko Petrič (Author)

Abstract

Liquefied wood-based polyurethane wood coatings of an aesthetically acceptable light colour were prepared and characterised. Liquefied black poplar wood was obtained by solvolysis in a polyethylene glycol/glycerol mixture, and it was bleached with hydrogen peroxide. The bleaching treatment converted liquefied wood from a dark brown to a yellowish product. Polyurethane films were prepared by the curing of liquefied wood with polymeric diphenylmethane diisocyanate or trimethylolpropane toluene diisocyanate prepolymer (TMP/TDI) isocyanate-type hardeners. It was found that the selected properties of the films prepared from the bleached liquefied wood were, in general, equivalent to those prepared from unbleached liquefied wood. The mechanical properties of the films obtained with the TMP/TDI curing agent were acceptable for wood coating applications. The initial poor resistance of the films to water and ethanol was substantially improved by the addition of n-octyltriethoxysilane to the liquefied wood prior to the preparation of the polyurethane coatings; the hardness of the films also increased.

Keywords

utekočinjen les;poliuretanski premaz;les;beljenje;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 630*8
COBISS: 2375049 Link will open in a new window
ISSN: 1930-2126
Views: 958
Downloads: 349
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Unknown
Type (COBISS): Not categorized
Pages: str. 3347-3363
Volume: ǂVol. ǂ10
Issue: ǂiss. ǂ2
Chronology: 2015
ID: 9142124