Preparation of two-component polyurethane coatings from bleached liquefied wood

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

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Title:	Preparation of two-component polyurethane coatings from bleached liquefied wood
Authors:	ID Cheumani-Yona, Arnaud Maxime (Author) ID Budija, Franc (Author) ID Hrastnik, David (Author) ID Pavlič, Matjaž (Author) ID Pori, Pavel (Author) ID Tavzes, Črtomir (Author) ID Petrič, Marko (Author)
Files:	http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_3347_Cheumani_Yona_Polyurethane_Coatings_Liquefied_Wood
Language:	English
Work type:	Not categorized
Typology:	1.01 - Original Scientific Article
Organization:	UPR - University of Primorska
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
Year of publishing:	2015
Number of pages:	str. 3347-3363
Numbering:	Vol. 10, iss. 2
PID:	20.500.12556/RUP-7759
ISSN:	1930-2126
UDC:	630*8
COBISS.SI-ID:	2375049
Publication date in RUP:	03.04.2017
Views:	4503
Downloads:	135
Metadata:
:	CHEUMANI-YONA, Arnaud Maxime, BUDIJA, Franc, HRASTNIK, David, PAVLIČ, Matjaž, PORI, Pavel, TAVZES, Črtomir and PETRIČ, Marko, 2015, Preparation of two-component polyurethane coatings from bleached liquefied wood. [online]. 2015. Vol. 10, no. 2, p. 3347–3363. [Accessed 30 March 2025]. Retrieved from: http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_3347_Cheumani_Yona_Polyurethane_Coatings_Liquefied_Wood Copy citation