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Termična modifikacija različnih vrst lesa : diplomsko delo - visokošolski strokovni študij = Thermal modification of different wood species : graduation thesis - higher professional studiesVeg, TineS postopkom termične modifikacije lesu povečamo dimenzijsko stabilnost, obenem mu poslabšamo mehanske lastnosti in spremenimo barvo. Spremembe so zelo odvisne od temperature modifikacije. Postopek ... lahko uravnavamo tako, da s pomočjo parametrov modifikacije (temperature in časa) dosežemo želeno stopnjo spremembe strukture celične stene. Izbira vrednosti omenjenih parametrov se razlikuje glede na vrsto lesa. Termično smo modificirali 6 domačih drevesnih vrst: bor, smreko, jelko, kostanj, gaber in bukev. Polovico smo jih termično modificirali pri temperaturah 150 °C, 170 °C, 190 °C in 210 °C, ugotavljali izgubo mase in spremembo barve. Izguba mase se povišuje z naraščanjem temperature postopka, enako pa je tudi s potemnitvijo lesa; ta je zelo odvisna od drevesne vrste. Tako je npr. pri temperaturi 210 °C les gabra izgubil 16,27 % mase. Opazili smo, da pri nekaterih vzorcih že pri nižjih temperaturah prihaja do spremembe barve (170 °C). Gabrov les je potemnel za 39,7 % pri temperaturi modifikacije 210 °C. Z merjenjem barve obrušenih površin vzorcev smo ugotovili, da je notranjost lesa manj barvno spremenjena kot zunanja površina.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [T. Veg], 2009Language - slovenianCOBISS.SI-ID - 1778825
Author
Veg, Tine
Other authors
Pohleven, Franc |
Petrič, Marko, 1962-
Topics
les |
lesne vrste |
termična modifikacija |
vakuum |
wood |
wood species |
thermal modification |
vacuum |
vacuum
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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Veg, Tine | |
Pohleven, Franc | 05248 |
Petrič, Marko, 1962- | 00395 |
Source: Personal bibliographies
and: SICRIS
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