20.500.12556/RUL-346 Vpliv širine branik smrekovine na vezavo bakrovih pripravkov za les diplomsko delo - visokošolski strokovni študij Influence of spruce wood growth ring width on fixation of copper based wood preservatives graduation thesis - higher professional studies Bakrove spojine, kljub slabi vezavi v les, spadajo med najbolj razširjene in učinkovite aktivne sestavine zaščitnih pripravkov. Za izboljšanje vezave bakrovim pripravkom dodajamo amine, najpogosteje etanolamin. Raziskovali smo vpliv širine branik smrekovine na vezavo bakrovih pripravkov v les. Vzorce smrekovine smo s postopkom polnih celic impregnirali z 2 različnima pripravkoma: komercialnim Silvanolinom in vodno raztopino modre galice 3 različnih koncentracij. Impregnirane vzorce smo 4 tedne sušili, nato pa izprali po standardni metodi SIST EN 1250/2. Z atomsko absorbcijsko spektroskopijo smo določili delež v izpirkih izločenega bakra. Ugotovili smo, da se pri vzorcih s širšimi branikami izpere več bakrovih učinkovin kot pa pri vzorcih z ozkimi. Prav tako smo potrdili, da se je izpralo več bakrovih učinkovin iz vzorcev impregniranih z vodno raztopino bakrovega(II) sulfata kot pa iz vzorcev prepojenih s komercialnim pripravkom Silvanolin. Ta rezultat potrjuje, da etanolamin izboljša vezavo bakra v les in tako posledično vpliva na manjše izpiranje bakrovih učinkovin. Despite of insufficient fixation, copper based preservatives belong to the group of the most frequently used and effective wood preservatives. As copper compounds do not react with wood in the absence of biocides, ethanolamine is introduced into the preservative solution. Influence of spruce wood ring width on fixation of copper based preservatives was studied. Spruce wood specimens were vacuum impregnated with 2 different copper based preservatives namely: commercial preservative Silvanolin and aqueous solution of copper sulphate of 3 different concentrations. Impregnated wood specimens were dried 4 weeks and afterwards leached according to the SIST EN 1250/2 procedure. Atomic absorption spectroscopy was used to determine copper content in collected leachates. The results show, that copper fixation is much better at the specimens with narrow ring width compared to the ones with wide ones. Furthermore, it was proved, that copper leaching was more prominent at specimens impregnated with aqueous solution of copper(II) sulphate compared to Silvanolin impregnated specimens. This is another prove, that ethanolamine can significantly improve copper fixation in wood in this way influencing smaller leaching of copper. zaščita lesa bakrovi pripravki širina branike gostota navzem izpiranje wood preservation copper based preservatives growth ring width density retention leaching true false false [S. Jug] Slovenski jezik Angleški jezik Diplomsko delo 2014-07-11 12:25:11 2014-07-11 12:25:11 2022-07-11 10:19:49 0000-00-00 00:00:00 2009 0 Ljubljana 0 IX, 40 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*841.13 1703561 vs_jug_samo.pdf vs_jug_samo.pdf 1 962BB48C496D397C6DBEE7BC8CB0E62D 7c14a7b76f2aef9201a30cecefc9e729186bde4b7f3bfb359fa6eab55bdd3012 5d8e2275-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/c3a35ecc-80b3-4ddb-9ba7-4b822e057df7 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132312 Biotehniška fakulteta 0 0 0