Higroskopnost in dimenzijska stabilnost lesa modificiranega z derivatom imidazola : diplomsko delo : visokošolski strokovni študij; Hygroscopity and dimensional stability of wood modified with imidazol derivate : graduation thesis : higher professional studies

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Higroskopnost in dimenzijska stabilnost lesa modificiranega z derivatom imidazola : diplomsko delo : visokošolski strokovni študij = Hygroscopity and dimensional stability of wood modified with imidazol derivate : graduation thesis : higher professional studies

Bižal, Uroš

Preučili smo možnost kemične modifikacije bukovine (Fagus sylvatica L.), beljave smrekovine (Picea abies Karst.) ter beljave borovine (Pinus sylvestris L.) s sredstvom, katerega glavna komponenta je ... derivat imidazola - dihidroksidimetiloletilen sečnina (DMES). Modifikacijo smo izvedli z dvema različnima koncentracijama sredstva (5 in 20 %) pri dveh temperaturah modifikacije (150 in 170 °C). Potek reakcije in stopnjo modifikacije smo ovrednotili z odstotnim povečanjem mase (WPG). Določili smo razliko v ravnovesni vlažnosti modificiranih in kontrolnih vzorcev ter vpliv modifikacije na dimenzijsko stabilnost vzorcev (ASE). Preučili smo tudi vpliv parametrov procesa modifikacije na izpiranje sredstva iz modificiranih vzorcev(SIST EN 84) . Optimalen postopek modifikacije je postopek z 20 % raztopino sredstva (čeprav ni velikih odstopanj v primerjavi s 5 % raztopino) pri temperaturi 170 °C. Z navedenim postopkom dosežemo najmanjše izpiranje sredstva, kar kaže na to, da je premreženje pri temperaturi 170 °C boljše kot pri temperaturi 150 °C. S to metodo modifikacije smo dosegli boljšo dimenzijsko stabilnost in nižjo ravnovesno vlažnost modificiranih vzorcev v primerjavi s kontrolnimi vzorci.

Type of material - undergraduate thesis ; adult, serious

Publication and manufacture - Ljubljana : [U. Bižal], 2008

Language - slovenian

COBISS.SI-ID - 1689481

Link(s):
http://www.digitalna-knjiznica.bf.uni-lj.si/vs_bizal_uros.pdf
Repository of the University of Ljubljana – RUL

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Other authors
Pohleven, Franc | Gorišek, Željko

Topics
modifikacija lesa | DMES | WPG | dimenzijska stabilnost | ASE | wood modification | DMHEU | WPG | dimensional stability | ASE | ASE

Availability in libraries

Library/institution	City	Acronym	For loan	Other holdings
BF, Department of Wood Science and Technology, Lj.	Ljubljana	BFLES	reading room 1 cop.

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Year	Impact factor		Edition		Category		Classification
Year	JCR	SNIP	JCR	SNIP	JCR	SNIP	JCR	SNIP

Links to authors' personal bibliographies	Links to information on researchers in the SICRIS system
Bižal, Uroš
Pohleven, Franc	05248
Gorišek, Željko	05732

Source: Personal bibliographies and: SICRIS

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