20.500.12556/RUL-622 Mehanske in sorpcijske lastnosti lesa impregniranega z etanolaminom diplomski projekt Mechanical and sorption properties of wood impregnated with ethanolamine B. Sc. thesis Etanolamin je ena pomembnejših kemikalij, ki se uporablja v lesarstvu in z lesarstvom povezanimi panogami. Etanolamin dodajamo zaščitnim sredstvom za boljšo vezavo Cu v les, uporablja se v papirništvu za pulpanje, v restavratorstvu za patiniranje, itd. Kljub dolgoletni uporabi etanolamina, interakcije med etanolaminom in lesom še niso v celoti pojasnjene. Znano je, da reagira predvsem z ligninom in hemicelulozo. Pri tem se lahko spremenijo mehanske in sorpcijske lastnosti. Da bi ugotovili, kako velike so te spremembe, smo vzorce smreke (Picea abies) in bukve (Fagus sylvatica) impregnirali z 2 različnima koncentracijama vodne raztopine etanolamina in jih izpostavili 4 različnim načinom kondicioniranja. Suhe vzorce smo izpostavili 2 različnim relativnim zračnim vlažnostim in gravimetrično spremljali vlažnost in določali dimenzije vzorcev. Tlačno trdnost smo določili z destruktivno metodo. Rezultati so pokazali, da se tlačna trdnost z etanolaminom impregniranih vzorcev poveča. Po drugi strani je v večini primerov ravnovesna vlažnost z etanolaminom obdelanih vzorcev višja od vlažnosti vzporednih kontrolnih vzorcev. Ethanolamine is one of the most important chemicals used in wood and wood related industries. Ethanolamine is a component of wood preservatives that improves fixation of Cuč it is used in paper industry for pulping, and in restoration for patination, etc. Despite the fact, that ethanolamine has been used for decades, complete interactions between wood and ethanolamine have not yet been fully explained. It is known that it reacts with lignin and hemi-celluloseč therefore, this might affect mechanical and sorption properties. In order to determine how significant these changes are, the samples of spruce (Picea abies) and beech (Fagus sylvatica) were impregnated with 2 different concentrations of aqueous solution of ethanolamine, and conditioned according to 4 different methods. Afterwards, dried samples were exposed to 2 different relative humidities, and then moisture content and dimensions were determined. Compression strength was measured by a destructive method. The results show that the compression strength of the samples, impregnated with ethanolamine, increases. On the other hand, the equilibrium moisture content of the samples is often higher than that of the control ones. les impregnacija lesa etanolamin mehanske lastnosti sorpcijske lastnosti wood impregnation ethanolamine mechanical properties sorption properties true false false [M. Pajk] Slovenski jezik Angleški jezik Diplomsko delo 2014-07-11 12:26:24 2014-07-11 12:26:24 2022-07-11 10:36:26 0000-00-00 00:00:00 2011 0 Ljubljana 0 VIII, 44 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*841.12 1961609 dv1_pajk_matjaz.pdf dv1_pajk_matjaz.pdf 1 DBC9D5BE739B7ABF2399CA033EF8BAD1 8936c6822f76ae19b69726110928a7dd81396e47449a5be5480824c774d61684 65ab51c8-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/2f528a41-9333-4cf9-8444-91163f199c29 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132435 Biotehniška fakulteta 0 0 0