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Izguba mase termično modificiranega lesa in njegova odpornost proti lesnim glivam : diplomsko delo - univerzitetni študij = Mass loss of thermally modified wood and its resistance against wood decay fungi : graduation thesis - university studiesŠušteršič, ŽigaTermična modifikacija lesa povzroči v oleseneli celični steni vrsto kemijskih sprememb, ki izboljšajo dimenzijsko stabilnost in odpornost lesa proti glivam, poslabšajo pa nekatere mehanske lastnosti. ... Les rdečega bora smo termično modificirali v prisotnosti dušika pri temperaturah 220 °C, 240 °C in 250 °C. Po koncu modifikacije smo vzorcem z gravimetrično metodo določili izgubo mase. Z mini blok testom smo ugotavljali odpornost modificiranega lesa proti beli hišni gobi (Poria placenta). Z metodo GC-MS smo spremljali kemijske spremembe v lesu med modifikacijo in po njej. Analizirali smo vsebnost C, H in O ter izračunali razmerje O/C. Ugotovili smo, da so izgube mase večje pri višji temperaturi in daljšem času modifikacije. Odpornost lesa se s stopnjo modifikacije povečuje. Pri 15 % izgubi mase so bili vsi vzorci popolnoma odporni proti glivi, ne glede na temperaturo. Vzrok izboljšanja odpornosti je razgradnja glavnih lesnih komponent, predvsem hemiceluloze, ki je glivam glavni vir hrane. Posledica termičnega razkroja je zmanjšanje deleza O/C po modifikaciji. Razmerje O/C se spreminja linearno s stopnjo modifikacije, kar omogoča posredno določanje izgube mase.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [Ž. Šušteršič], 2009Language - slovenianCOBISS.SI-ID - 1778569
Author
Šušteršič, Žiga
Other authors
Pohleven, Franc |
Humar, Miha
Topics
les |
rdeči bor |
termična modifikacija |
odpornost |
lesne glive |
razmerje O/C |
wood |
Scots pine |
thermal modification |
resistance |
wood decay fungi |
O/C ratio |
O/C ratio
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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Shelf entry
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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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Šušteršič, Žiga | |
Pohleven, Franc | 05248 |
Humar, Miha | 19106 |
Source: Personal bibliographies
and: SICRIS
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