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Fiksacija pripravka na osnovi bakra, etanolamina, oktanojske kisline in bora v impregniranem lesu : diplomsko delo (visokošolski strokovni študij) = Fixation of wood preservative composed of copper, ethanolamine, octanonic acidand boron in impregnated wood : graduation thesis (higher professional studies)Jecl, BoštjanNajvečja slabost zaščitnih sredstev na osnovi bakra je, da se baker zelo slabo veže na lesne komponente. To omejuje uporabo impregniranega lesa na mestih, kjer je nevarnost izpiranja aktivnih ... komponent. Težave z izpiranjem so rešili z dodajanjem kromovih spojin, ki baker dobro fiksirajo v komponente lesa. Ker so kromove spojine zdravju in okolju škodljive, v zadnjem času intenzivno razvijajo okoljsko primernejše pripravke. Kot še posebej primeren fiksator se je izkazal etanolamin z dodatkom oktanojske kisline. Dokazano je, da etanolamin kemijsko reagira z lesom in bakrom ter izboljša njegovo vezavo v les, oktanojska kislina pa deluje hidrofobno. Zato smo raziskovali vpliv koncentracije novega pripravka, postopka zaščite in drevesne vrste na izpiranje bakrovih učinkovin iz lesa. V ta namen smo vzorce 3 drevesnih vrst (bukev, smreka in bor) impregnirali z različnimi kombinacijami in koncentracijami zaščitnih pripravkov na osnovi bakra, etanolamina, oktanojske kisline, kvartarne amonijeve spojine ter bora. Zaščita se je izvajala na 3 načine: s premazovanjem, potapljanjem in v impregnacijski komori. Izpiranje različno zaščitenih vzorcev je potekalo po modificirani standardni metodi SIST EN 1250/2. Delež bakra v izpirkih smo določili z atomsko absorpcijsko spektroskopijo. Ugotovili smo, da se je pri vzorcih, zaščitenih z nižjo koncentracijo izpralo manj bakra kot pri vzorcih, ki so bili prepojeni z višjo koncentracijo zaščitnega pripravka. V povprečju se je najmanj bakra izpralo iz smrekovih vzorcev, prepojenih z raztopino na osnovi bakra, etanolamina in oktanojske kisline. Najslabšo fiksacijo smo dosegli pri premaznih vzorcih.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [B. Jecl], 2005Language - slovenianCOBISS.SI-ID - 1335689
Author
Jecl, Boštjan
Other authors
Pohleven, Franc |
Humar, Miha |
Petrič, Marko, 1962-
Topics
zaščita lesa |
bakrovi pripravki |
koncentracija pripravkov |
izpiranje bakra |
wood preservation |
copper based preservatives |
preservatives concentration |
copper leaching
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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DRS, in which the journal is indexed
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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Jecl, Boštjan | |
Pohleven, Franc | 05248 |
Humar, Miha | 19106 |
Petrič, Marko, 1962- | 00395 |
Source: Personal bibliographies
and: SICRIS
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