diplomsko delo
Nino Sorčan (Author), Boštjan Lesar (Reviewer), Marko Petrič (Mentor), Matjaž Pavlič (Co-mentor)

Abstract

Izvedli smo obžiganje smrekovine s plamenom in vplive tega površinskega postopka obdelave na izbranih lastnostih primerjali z rezultati termične modifikacije lesa v vakuumu. Pripravljene vzorce smo analizirali z metodo FTIR spektroskopije, na površinah izmerili stične kote destilirane vode, formamida in dijodometana ter izračunali prosto površinsko energijo. Vzorce smo premazali s transparentnim premazom in z metodo odtrgovanja pečatov izmerili oprijemno trdnost premaza. Določili smo tudi spremembo barve. Rezultati nakazujejo na to, da so učinki obžiganja podobni vplivom termične modifikacije na izbrane površinske lastnosti. Pri postopku v vakuumu modifikacija poteče po celotnem prerezu lesa, medtem ko pri obžiganju le na površini. Obžiganje je v primerjavi s termično modifikacijo hitrejše, cenovno ugodnejše in bolj enostavno.

Keywords

površina lesa;obžiganje s plamenom;termična modifikacija;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [N. Sorčan]
UDC: 630*829.1
COBISS: 3112585 Link will open in a new window
Views: 736
Downloads: 167
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Other data

Secondary language: English
Secondary title: Wood charring as a finishing technique
Secondary abstract: We performed surface charring of spruce wood with the flame treatment, and compared its surface effects on selected properties with the influence of thermal modification of wood in vacuum. The samples were analysed with the method of FTIR spectroscopy, we measured contact angles of distilled water, formamide and diodomethane and calculated the surface free energy. The treated samples were coated with a transparent coating and its adhesion strengrh was determined with the pull-off test method. The results indicate that the effects of flame treatment are similar to those caused by thermal modification in vacuum, in the case of selected surface properties. When the samples are heat treated in vacuum, bulk modification occurs, while in the case of flame treatment only the surface is affected. Charring of wood with a flame burner is in comparison with thermal modification in vacuum faster, cheaper, enonomically more efficient and less demanding.
Secondary keywords: wood surface;charring with flame;thermal modification;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages: VIII, 26 f.
ID: 11227601