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Alternativne metode za vrednotenje kakovosti termično modificiranega lesa : magistrsko delo = Alternative methods for quality assesment of thermally modified wood : M. Sc. thesisRepič, RožleTermična modifikacije lesa je postopek, pri katerem v odsotnosti atmosferskega kisika les segrevamo pri temperaturah med 180 °C in 240 °C in s tem spremenimo določene lastnosti lesa. Glavne prednosti ... TML (termično modificiran les) so izboljšana odpornost proti škodljivcem, nižja ravnovesna vlažnost in boljša dimenzijska stabilnost. Zaradi vedno večjega povpraševanja po TML se je pojavila potreba po enostavnem in hitrem določanju kakovosti. Smrekovino, bukovino, jesenovino in topolovino smo termično modificirali po treh različnih postopkih pri temperaturah od 180 °C do 230 °C. Primerjali smo vpliv lesne vrste, temperature in postopka modifikacije na relevantne lastnosti lesa. Vzorcem smo gravimetrično določili izgubo mase med modifikacijo, izmerili smo barvo po CIE L*a*b* sistemu, določili osnovno gostoto in gostoto celične stene, tlačno trdnost in modul elastičnosti, izmerili vrednost pH, stični kot vodne kapljice na površini spremljali smo navzem vode in vodne pare. Izguba mase je višja pri vzorcih modificiranih pri višji temperaturi, enako je s spremembo barve. Stični kot vodne kapljice je pri vzorcih modificiranih pri višji temperaturi večji. Kratkotrajni navzem skozi čelno površino vzorca pri bukovini je manjši pri višji temperaturi modifikacije, tudi ravnovesna vlažnost je nižja. Kot najbolj indikativna metoda za določanje stopnje modifikacije se je izkazala metoda DVS (dinamična sorpcija vodne pare).Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [R. Repič], 2018Language - slovenianCOBISS.SI-ID - 2946953
Author
Repič, Rožle
Other authors
Humar, Miha |
Lesar, Boštjan
Topics
modifikacija lesa |
termična modifikacija |
gostota lesa |
sorpcijske lastnosti |
kontrola kakovosti |
kontrola kakovosti |
modification of wood |
thermal modification |
wood density |
sorption properties |
quality control |
quality control
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Repič, Rožle | 51944 |
Humar, Miha | 19106 |
Lesar, Boštjan | 28503 |
Source: Personal bibliographies
and: SICRIS
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