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Sorpcijske lastnosti smrekovine impregnirane z vodnimi emulzijami polietilenskega voska : diplomsko delo - visokošolski strokovni študij
ID Grof, Tomaž (Author), ID Humar, Miha (Mentor) More about this mentor... This link opens in a new window, ID Gorišek, Željko (Reviewer)

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PID: 20.500.12556/rul/34407cef-6e01-43b9-92fe-fa61a013b2ba

Abstract
Zadnje čase se v zaščiti lesa vedno bolj uveljavljajo nebiocidne oblike zaščite. Ena od takšnih oblik je tudi zaščita z vodnimi emulzijami voskov, s katerimi želimo ohraniti les čimbolj suh in ga tako zaščititi pred glivami razkrojevalkami. Iz smrekovine (Picea abies) smo izdelali vzorce za določanje sorpcijskih lastnosti (20 mm x 20 mm x 10 mm) in vzorce namenjene določanju hitrosti navlaževanja (50 mm x 25 mm x 15 mm). Vse smo impregnirali z različno koncentriranimi vodnimi emulzijami polietilenskega in oksidiranega polietilenskega voska in z različnimi kombinacijami vodnih emulzij voska in borove kisline. Sorpcijsko krivuljo smo določali z uravnovešanjem vzorcev pri naslednjih relativnih zračnih vlažnostih: 20 %, 33 %, 65 %, 88 % in 98 %. Vzporedno smo določali tudi hitrost navlaževanja v vodi in vlažnem zraku (RZV = 88 %). V času preizkusa navlaževanja smrekovih vzorcev na zraku (RZV = 80 %) so imeli najnižjo vlažnost neimpregnirani vzorci. Pri navlaževanju vzorcev potopljenih v vodi smo ugotovili, da v prvem tednu vodne emulzije ne upočasnijo prodiranja vode, pri daljšem izpostavljanju pa je učinek impregnacije uspešen.

Language:Slovenian
Keywords:les, zaščita lesa, voski, sorpcija, vodne emulzije, navlaževanje
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Place of publishing:Ljubljana
Publisher:[T. Grof]
Year:2009
Number of pages:XII, 66 f.
PID:20.500.12556/RUL-472 This link opens in a new window
UDC:630*841.1
COBISS.SI-ID:1781641 This link opens in a new window
Publication date in RUL:11.07.2014
Views:1620
Downloads:332
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Secondary language

Language:English
Title:Sorption properties of spruce wood impregnated with water polyethilene wax emulsion : graduation thesis - higher professional studies
Abstract:
In recent years, the importance of non-biocidal solutions for wood protection is increasing. One of non-biocidal techniques is the treatment of wood with water wax emulsions. Those solutions disable moisturizing of wood and thus prevent it against fungal infestation. To elucidate this presumption, specimens for determination of sorption properties (20 mm x 20 mm x 10 mm) and specimens for determination of velocity of moisturizing (50 mm x 25 mm x 15 mm) were prepared from Norway spruce (Picea abies) wood, and impregnated with different polyethylene and oxidized polyethylene wax emulsions of various concentrations. To improve performance of impregnated wood, boric acid was added to the selected solutions. Sorption curve was determined through conditioning of the specimens in chambers with different relative air humidity (20 %, 33 %, 65 %, 88 % in 98 %). Velocity of moisturizing was determined through conditioning of the impregnated specimens in water and in achamber with high relative humidity (RH = 80 %). The results of the conditioning at RH of 80 % showed that the lowest moisture content was determined at control - unimpregnated specimens. Similar observation was observed at specimens soaked in water in the first period of immersion. However, after longer period of soaking, influence of wax treatment became more evident.

Keywords:wood, wood preservation, waxes, water emulsions, humidification, sorption

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