Primerjava lastnosti sodobnih lesnih premazov za zunanjo uporabo

diplomsko delo (visokošolski strokovni študij)

Matej Hočevar (Author), Vesna Tišler (Reviewer), Marko Petrič (Mentor)

Abstract

Preučevali smo možnosti uporabe avtomobilskega laka na bukovi in tako imenovanega nanopremaza ter komercialnega premaza na robinijevi podlagi. Vzorce smo izpostavili umetnemu pospešenemu staranju in izmerili debeline filmov, določili permeabilnost, barvo in sijaj. Ugotovili smo, da avtomobilski lak, kljub svoji optimiranosti za uporabo na vozilih, ni primeren za zunanjo zaščito lesa, saj je preveč nepermeabilen. V procesu staranja je površina razpokala; lak se je dobro odrezal le pri zaščiti podlage pred fotodegradacijo in diskoloracijo. Tudi nanopremaz se ni obnesel, saj ni zaščitil podlage pred fotodegradacijo; sijaj se mu je med umetnim pospešenim staranjem občutno spremenil, prav tako je bil podvržen izpiranju s podlage. Komercialni premaz se je izkazal najbolje; permeabilnost je bila zadovoljiva, kar se je kasneje pokazalo tudi pri umetnem pospešenem staranju. Spremembe barve in sijaja bi lahko ocenili kot majhne, saj razen rahle potemnitve in izgube sijaja, površina ni bistveno spremenila svojega izgleda. Menimo, da bi bilo z nadaljnjimi raziskavami smiselno proučiti in primerjati več sodobnih premazov med seboj, se posebno če bi jih dodatno modificirali.

Keywords

les;površinska obdelava lesa;nanotehnologija;nanopremazi;avtomobilski lak;

Data

Language:	Slovenian
Year of publishing:	2007
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[M. Hočevar]
UDC:	630*829.19
COBISS:	1542281
Views:	1069
Downloads:	299
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Comparison of characteristics of temporary wood coatings for exterior use
Secondary abstract:	Possible applications of the automobile coating on beech wood substrate, and the so called nano-coating and the commercially obtainable wood finish on robinia substrate, were studied. The samples were exposed to artificially accelerated ageing. Coating layers thickness was measured and permeability, colour and gloss determined. It was found out that the automobile coating, in spite of its optimal properties for the use on vehicles, is not appropriate for protection of wood exposed outdoors. During the process of aging, the surface of the automobile coating cracked, because it was not permeable enough. This finish proved its applicability only for the protection of a substrate against photodegradation and discolourations. The nano-coating also did not perform well; it did not protect the substrate against photodegradation, and furthermore, its gloss changed during artificial ageing; it also was subjected to leaching. On the contrary, the commercially available and established finish exhibited much better properties. Its permeability was satisfying, what was proved later during the accelerated aging. Changes of colour and gloss were estimated as insignificant - beside only slight darkening and loss of gloss, the appearance of the surface did not change essentially. We believe that it would be well to investigate and compare a wider spectrum of contemporary coatings, especially when additionally modified.
Secondary keywords:	wood;surface finishing;nanotechnology;nanocoating;automobile coating;
Type (COBISS):	Undergraduate thesis
Thesis comment:	Diplomsko delo, Univ. v Ljubljani, Biotehniška fakulteta, Oddelek za lesarstvo
Pages:	X, 50 f., [4 f. pril.]
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;agriculture and related sciences and techniques;forestry;farming;wildlife exploitation;kmetijstvo ter sorodne vede in tehnologije;forestry;gozdarstvo;forest products and their utilization;gozdni proizvodi in njihova uporaba;
ID:	21131