Vpliv staranja na barierne premaze za naknadno zaščito lesa

diplomsko delo - visokošolski strokovni študij

Iztok Škrinjar (Avtor), Franc Pohleven (Recenzent), Marko Petrič (Mentor)

Povzetek

Raziskovali smo lastnosti premazov, ki so pomembne za naknadno zaščito lesa, v katerem predhodno uničimo lesne škodljivce z okolju prijaznim nebiocidnim anoksi postopkom. Površinsko bariero bi lahko uporabili za naknadno zaščito površin na lesenih predmetih kulturno-zgodovinske dediščine. Zato nas je za oceno trajnosti premazov zanimalo, kako vpliva staranje na premaz. Ugotavljali smo, kako umetno pospešeno staranje vpliva na prepustnost premazov za vodno paro, njihovo barvo in sijaj. Deset različnih premazov smo nanesli na podlage iz smrekovine, starane smrekovine, lipovega in staranega lipovega lesa. Za kontrolo smo uporabili nepremazane vzorce. Najprej smo na vzorcih izmerili debelino filma, nato pa določili navzem in oddajanje vodne pare, barvo in sijaj. Drugo skupino preizkušancev smo izpostavili umetnemu pospešenemu staranju in po staranju ponovno določili navzem in oddajanje vodne pare, barvo in sijaj. Tako kontrolni kot premazani vzorci so po umetnem pospešenem staranju spremenili sorpcijske lastnosti, sijaj in barvo. S prostim očesom na premazih, ki so bili izpostavljeni staranju, nismo zaznali nastanka površinskih razpok. Med vsemi preizkušenimi premazi se je za najbolj primeren barierni premaz izkazal Stipol-AF. Uporabimo ga lahko tako na lesenih plastikah za uporabo v notranjih prostorih, kot za predmete, ki so izpostavljeni vremenskim vplivom.

Ključne besede

barierni površinski premaz;umetno pospešeno staranje;vodna para;permeabilnost;barva;sijaj;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2016
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL BF - Biotehniška fakulteta
Založnik:	[I. Škrinjar]
UDK:	630*829.1
COBISS:	2634377
Št. ogledov:	331
Št. prenosov:	82
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Impact of ageing on barrier coatings for postponed protection of wood
Sekundarni povzetek:	We investigated the properties of surface wood coatings which are relevant for the subsequent (postponed) protection of wood, which has been pre-treated for destroying of wood pests with environmentally friendly non-biocidal anoxic treatment. Surface barrier can be used for the postponed protection of surfaces of wooden artefacts of cultural and historical heritage. To assess the durability of the coatings, we wanted to investigate how does the ageing influence on a surface wood coating. We explored how artificial accelerated ageing influences the water vapour permeability of selected wood coatings, their colour and gloss. Ten different wood coatings were applied to spruce wood, aged spruce wood, lime-treewood and aged lime-treewood substrates. For control purposes, we used uncoated spruce wood and lime-treewood samples. At first, we measured the thickness of the film on the samples. Then we determined the uptake and release of water vapour, and colour and gloss on the selected samples. The second group of samples was exposed to artificial accelerated ageing after which we re-determined the uptake and release of water vapour, colour and gloss on the selected samples. Following the accelerated aging, both the control and coated samples changed their sorption properties, their colour and gloss. With the naked eye, we did not see any surface cracks on the coatings exposed to artificial accelerated ageing. Stipol-AF proved to be the most appropriate barrier coating from amongst the coatings tested. It can be used on wooden statuaries used in interior, as well as for items which are exposed to the weather.
Sekundarne ključne besede:	barrier surface coating;artificial accelerated ageing;water vapour;permeability;colour;gloss;
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Strani:	XI, 63 f., [14] f. pril.
ID:	11928303