20.500.12556/RUL-158799 Mehanske lastnosti termično modificirane pirave bukovine diplomski projekt Mechanical properties of thermally modified white rot in beachwood B. Sc. thesis V gozdovih in na lesnopredelovalnih skladiščih se zaradi piravosti razvrednoti veliko bukovine. Z namenom izboljšanja lastnosti smo piravo bukovino termično modificirali. Pri postopku termične modifikacije se lesu poveča dimenzijska stabilnost in odpornost na škodljivce, poslabšajo pa se mu mehanske lastnosti. Spremeni se tudi barva lesa. Spremembe so odvisne od temperature modifikacije. Postopek uravnavamo tako, da s pomočjo parametrov, se pravi temperature in časa, dosežemo želeno stopnjo sprememb strukture celične stene lesa. Termično smo modificirali piravo bukovino pri temperaturah 170 °C, 190 °C in 210 °C. Pri tem smo ugotavljali izgubo mase, spremembo barve in mehanske lastnosti, pri katerih smo največjo pozornost namenili upogibni trdnosti in modulu elastičnosti. Ugotovili smo, da se pri termični modifikaciji mehanske lastnosti piravi bukovini poslabšajo, še zlasti pri najvišji uporabljeni temperaturi (210 °C). White rot fungi are the main cause of beech wood degradation in forests or wood procesing storages. To enhance wood's properties, we performed a thermal modification of a beech wood, colonized by a white rot fungi. Thermal modification processes of wood is used to increase it's dimensional stability and pest resistance, it however deteriorates the mechanical properties and colour of wood. Level of change depends of temperature height during modification process. We can control the process by managing parameters, such as temperature level and duration, to achieve desired level of the cell-wall structural change. We did a thermal modification of beech wood colonized by a white rot fungi, at a temperature of 170 °C, 190 °C and 210 °C. During the process, we attempted to determine the loss of mass, colour changes and differences in mechanical properties, mainly focusing on bending hardness. We concluded, that mechanical properties of a beech wood, colonized by white rot fungi, do in fact deteriorate, especially when processing it at the highest temperature of 210 °C. les termična modifikacija vakuum mehanske lastnosti wood termally modification vacuum mehanical properties true false false M. Susman Slovenski jezik Angleški jezik Delo diplomskega projekta/projektno delo 2024-06-20 13:18:08 2024-06-20 13:18:10 2024-07-05 03:22:28 0000-00-00 00:00:00 2016 0 Ljubljana 2016 Ljubljana VIII, 23 f., [9] f. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*84 2579081 DIP_Susman_Matej_2016.pdf DIP_Susman_Matej_2016.pdf 1 6F99661B619677C5380D2B40BB076E42 62fd99b227c26c3be63442e16ab3ae95d4bdb86c7eca89dea1ca537b83c96d44 c709b429-2ef6-11ef-a73e-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186521 Biotehniška fakulteta 0 0 0