Wax treatment of wood slows photodegradation

Boštjan Lesar (Avtor), Matjaž Pavlič (Avtor), Marko Petrič (Avtor), Andrijana Sever Škapin (Avtor), Miha Humar (Avtor)

Povzetek

Waxes and wax emulsions are one of the most important solutions for non-biocidal wood protection. Wax treated wood is designed for outdoor use, therefore it is of considerable importance to elucidate the influence of weathering on the photodegradation processes. It is presumed, that wax treatment will reduce water uptake and thus reduce or slow down photodegradation processes. In order to test this hypothesis, three types of wax emulsions at two different concentrations were vacuum impregnated into Norway spruce wood specimens: an emulsion of montan wax (LGE), an emulsion of polyethylene (WE1) and an emulsion of oxidized polyethylene (WE6) wax. The samples were exposed to artificial accelerated weathering (AAW) for 500 cycles. Before and after AAW colour, the contact angle of water and moisture content were determined. Chemical and morphological changes at exposed surfaces were also investigated with FTIR spectroscopy and SEM. In parallel, the uptake of wax emulsions and water into the axial surfaces of samples was determined with a tensiometer. The moisture content measurements showed that the best hydrophobic effect was achieved with LGE treated wood, where the lowest colour and FTIR changes were observed as well. These results were supported by tensiometer measurements as well. Presented data clearly showed that high loadings of waxes reduce or at least slow down weathering. Among tested waxes, montan wax was found the most effective.

Ključne besede

wax emulsions;contact angle;CIELAB;FTIR;water repellent;

Podatki

Jezik:	Angleški jezik
Leto izida:	2011
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL BF - Biotehniška fakulteta
UDK:	630*841
COBISS:	1914761
ISSN:	0141-3910
Št. ogledov:	1198
Št. prenosov:	371
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarne ključne besede:	emulzija voskov;kontaktni kot;
Vrsta dela (COBISS):	Delo ni kategorizirano
Strani:	str. 1271-1278
Letnik:	ǂVol. ǂ96
Zvezek:	ǂno. ǂ7
Čas izdaje:	2011
ID:	1033436