20.500.12556/RUL-84239 Utekočinjanje lesa s pomočjo ultrazvoka in izdelava ivernih plošč z uporabo lepilnih mešanic z dodanim utekočinjenim lesom Liquefaction of wood using ultrasound and production of particleboards using adhesive mixtures with added liquefied wood Les lahko utekočinimo in uporabimo za sintezo različnih polimernih materialov, med drugim tudi za lepila. Glavni cilj naše raziskave je bil uporabiti utekočinjen les za pripravo lepila za iverne plošče ter določiti fizikalne in mehanske lastnosti izdelanih plošč. Določili smo čas želiranja različnih lepilnih mešanic v odvisnosti od deleža utekočinjenega lesa, vrste ter deleža katalizatorja in temperature. Za izdelavo ivernih plošč smo uporabili melamin-formaldehidno lepilo, ki smo mu dodali utekočinjen les in amonijev formiat kot katalizator. Ugotavljali smo vpliv deleža dodanega utekočinjenega lesa, vrste ter deleža katalizatorja in temperature stiskanja. Rezultati so pokazali, da se je čas želiranja z večanjem deleža dodanega utekočinjenega lesa podaljšal, z večanjem deleža katalizatorja in višanjem temperature pa skrajšal. Optimalne lastnosti ivernih plošč smo dosegli pri deležu utekočinjenega lesa 30 %, deležu katalizatorja 3 % in temperaturi stiskanja 180 °C. Wood can be liquefied and used for the synthesis of different polymer materials as well as for the adhesives. The aim of our research was to evaluate the utilization of liquefied wood as a part of an adhesive mixture in particleboard production and to assess physical and mechanical properties of produced particleboards. We determined gelation time for different adhesive mixtures depending on the liquefied wood portion, the type and the amount of the catalyst and temperature. For particleboard production, we used melamine-formaldehyde resin with added liquefied wood and ammonium formate as a catalyst. We examined the influence of liquefied wood portion, the type and the amount of the catalyst and pressing temperature on the particleboard properties. Results showed that gelation time increased with higher liquefied wood portion and decreased as the amount of catalyst and temperature increased. The optimal properties of particleboards were obtained at 30 % portion of liquefied wood, at 3 % amount of the catalyst and at pressing temperature of 180°C. melamin formaldehidna lepila iverne plošče melamin urea formaldehidna lepila obnovljivi viri utekočinjen les particleboards melamine-formaldehyde adhesive melamine-urea-formaldehyde adhesive renewable resources liquefied wood true false false Slovenski jezik Angleški jezik Delo ni kategorizirano 2016-07-21 02:30:28 2016-08-17 16:37:35 2022-08-02 01:03:55 0000-00-00 00:00:00 2012 0 0 Str. 116-122 št. 5 Letn. 64 2012 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 665.93:674 0024-1067 2021513 34263597 Cuk_Gozd_in_les_2012.pdf Cuk_Gozd_in_les_2012.pdf 1 478D26AF8B8FC5A7EA8DDF6F5E36039C f2d665dffe976a858bf0d66f459101c938c457aca9e46a61a777b4b29a1e32f1 5ed22b5b-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/9d0a2957-4f1a-4fe4-ab83-42d24f1b0b1f https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=100691 Biotehniška fakulteta 0 0 0