Obdelava površin lesa z obžiganjem

Sorčan, Nino (author), Petrič, Marko (mentor), Pavlič, Matjaž (comentor)

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.

• Language: Slovenian
• Keywords: površina lesa, obžiganje s plamenom, termična modifikacija
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [N. Sorčan]
• Year: 2019
• PID: 20.500.12556/RUL-110643
• UDC: 630*829.1
• COBISS.SI-ID: 3112585
• Publication date in RUL: 18.09.2019

SORČAN, Nino, 2019, Obdelava površin lesa z obžiganjem [online]. Bachelor’s thesis. N. Sorčan. [Accessed 2 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=110643

Secondary language

• Language: English
• Title: Burning wood as a finishing technique

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 diiodomethane and calculated the surface free energy. The treated samples were coated with a transparent coating and its adhesion strength 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 vacuume, in the case of selected surface properties. When the samples are heat treated in vacuume, 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, economically more efficient and less demanding.

• Keywords: wood surface, charring with flame, thermal modification