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Adsorpcija baker-etanolaminskih zaščitnih pripravkov v les = Adsorption of coper-ethanolamine preservatives in wood
Humar, Miha
Baker-etanolaminski pripravki so trenutno ena izmed najpomembnejših skupin za zaščito lesa v tretjem in četrtem razredu izpostavitve. Kljub večletni komercialni uporabi celotni mehanizem vezave teh ...pripravkov v les še ni pojasnjen. Znano je, da se v les vežejo hitreje kot pripravki na osnovi bakra bakrovih in kromakromovih spojin. V literaturi pa še ni podatkov o tem, kdaj je ta reakcija končana in kateri dejavniki vplivajo nanjo. V prispevku je opisan vpliv časa impregnacije, lesne vrste (smrekovine in bukovine), temperature in koncentracije komercialnega baker-etanolaminskega zaščitnega pripravka Silvanolin na adsorpcijo bakra bakrovih spojin v lesne iveri. Vsebnost bakra v ivereh smo določali z rentgensko fluorescenčno spektroskopijo(XRF). Ugotovili smo, da je adsorpcija bakrovih učinkovin v les,impregniran z baker-etanolaminskimi pripravki, hiter proces. V prvih šestih urah impregnacije se adsorbira med 60 in 80 % navzetega bakra v les. Z višjo koncentracijo pripravka narašča tudi adsorpcija bakrovih učinkovin v iveri. Impregnacija pri 50 °C močno izboljša adsorpcijo bakrovih učinkovin v les.
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