BF, Dept. of Wood Technology, Lj. (BFLES)
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Fiksacija pripravkov na osnovi bakra in etanolamina v lesu pri različnih temperaturah : diplomsko delo (visokošolski strokovni študij) = Fixation of copper-ethanolamine based wood preservatives into wood at different temperatures : graduation thesis (higher professional studies)Karlo, DarkoBakrovi zaščitni pripravki so učinkoviti in zelo razširjeni fungicidi. Njihova poglavitna slabost je slaba vezava v les. Ta lastnost omejuje uporabo zaščitenega lesa tam, kjer lahko prihaja do ... izpiranja aktivnih komponent iz lesa. Fiksacijo bakrovih učinkovin lahko močno izboljšamo z dodajanjem aminov in karboksilnih kislin. Raziskovali smo vpliv povišane temperature na vezavo baker-etanolaminskih pripravkov v les. Smrekove vzorce smo, s postopkom polnih celic impregnirali s tremi različnimi kombinacijami in koncentracijami zaščitnih pripravkov na osnovi bakra, etanolamina, oktanojske kisline, kvartarnih amonijevih spojin in bora. Po gravimetrično določenem mokrem navzemu smo impregnirane vzorce sušili pri različnih temperaturah in sicer: 25 °C, 50 °C, 75 °C in 103 °C. Izpiranje smrekovih vzorcev je potekalo v skladu z nekoliko modificirano standardno metodo SIST EN 1250/2. Delež izpranega bakra v izpirkih smo določili z atomsko absorpcijsko spektroskopijo. Ugotovili smo, da povišana temperatura sušenja negativno vpliva na vezavo zaščitnih pripravkov na osnovi bakra in etanolamina v les. Najmanj bakra se je izpralo pri naravno sušenih vzorcih (25 °C), največ pa pri impregniranih, sušenih pri 103 °C, ne glede na sestavo zaščitnega pripravka s katerim smo prepojili les. Verjetno je pri povišanih temperaturah sušenja prišlo do razgradnje lignina, na katerega se je vezalo največ bakra; to se je poznalo v večjem deležu izpranega bakra.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [D. Karlo], 2006Language - slovenianCOBISS.SI-ID - 1447305
Author
Karlo, Darko
Other authors
Humar, Miha |
Petrič, Marko, 1962-
Topics
zaščita lesa |
bakrovi pripravki |
izpiranje |
vezava |
wood preservation |
copper based preservatives |
leaching |
fixation
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Knjižnica BF za lesarstvo 0000000168 IN: 020060145 Knjižnica BF za lesarstvo 168 IN: 020060145 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Karlo, Darko | ![]() |
Humar, Miha | 19106 |
Petrič, Marko, 1962- | 00395 |
Source: Personal bibliographies
and: SICRIS
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