20.500.12556/RUL-138328 Voski in njihova uporaba v lesarstvu Vaxes and their applications in wood technology V prispevku so predstavljene osnovne značilnosti voskov in njihova delitev. Podane so lastnosti in uporaba voskov, ki se pogosto pojavljajo v lesarstvu (čebelji, karnauba, montanski, šelakov, parafinski in sintetični voski). Glavna lastnost voskov, ki jo v lesarstvu izkoriščamo, je njihova vodoodbojnost. Obdelava lesa z vodoodbojnimi sredstvi je v praksi zelo pogosta in se uporablja za zaščito pred navzemom tekoče vode ter za preprečevanje razvoja in rasti gliv. Najpogosteje se v ta namen uporablja parafinski vosek z dodatkom smol in biocidov. Vosek se na površini ne utrjuje kemijsko ampak se v lesno strukturo veže s šibkimi Van der Waalsovimi vezmi. To je vzrok, da voskana površina sčasoma izgublja vodoodbojni učinek. Basic characteristics of waxes and their classification are described in this contribution. Furthermore, basic prop- erties and potential uses of the most important waxes (bee, carnauba, montan, shellac, paraffin and synthetic wax) are described. These waxes are used in wood industry predominately due to their water repellency. Use of water repellents in wood industry is rather frequent procedure in order to limit water penetration and to prevent fungal infestation. Paraffin wax in combination with biocides and resins is the most commonly used for this purpose. However, waxes do not form chemical bonds with wood, but there are only weak Van der Waals bonds formed. This is the main reason for the fact, that wax treated surfaces lose hydrophobic properties within time. naravni voski sintetični voski les vodoodbojnost natural waxes synthetic waxes wood water repellency true false true Slovenski jezik Angleški jezik Članek v reviji 2022-07-15 12:16:26 2022-07-15 12:16:27 2022-09-15 04:16:33 0000-00-00 00:00:00 2009 0 0 Str. 188-193 št. 5 Let. 61 2009 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2009-01-01 630*829.19:638.17:665.36:665.77 0024-1067 1738889 RAZ_Lesar_Bostjan_2009.pdf RAZ_Lesar_Bostjan_2009.pdf 1 D648549393FA649E93D1B0F1EE925D34 eee03397ed1d8f55e2982291beabd6ee64b2d8a84aac509174e2b97baf0c599f f0643852-0427-11ed-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=158610 Biotehniška fakulteta Les 0 0 0