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Uporaba FT-IR spektroskopije za karakterizacijo ivernih plošč : diplomsko delo
Dolinšek, Ivan (Author), Medved, Sergej (Mentor) More about this mentor... This link opens in a new window, Tišler, Vesna (Reviewer)

URLURL - Presentation file, Visit http://www.digitalna-knjiznica.bf.uni-lj.si/dn_dolinsek_ivan.pdf This link opens in a new window

Abstract
Namen naloge je ugotoviti kemijsko zgradbo ivernih plošč s pomočjo FT-IR spektroskopije. Analiza temelji na presevanju vzorcev s svetlobo v valovnem številu med 400 cm-1 in 4000 cm-1, pri čemer merimo prepustnost oz. količino absorbirane svetlobe v odvisnosti od valovne dolžine. Meritve spektrov smo opravili z DRIFT (Diffuse Reflectance Infrared Fourier Transform) tehniko, katera je najpogostejša za analiziranje prašnih delcev (v našem primeru zmletega iverja). Uporabili smo iverne plošče proizvajalcev iz Rusije, Slovenije in Italije. Ena iverna plošča je bila zlepljena z melamin-formaldehidnim, ostale pa z urea-formaldehidnim lepilom. V dobljenem spektru med 400 cm-1 in 4000 cm-1 smo se osredotočili na valovni pas od 650 cm-1 do 1750 cm-1, koder se nahajajo funkcionalne skupine celuloze, hemiceluloze in lignina v lesu. Ugotovili smo, da lahko z FT-IR metodo določimo kemijsko zgradbo iverne plošče oz. funkcionalne skupine celuloze, hemiceluloze in lignina. S primerjavo FT-IR spektrov ivernih plošč smo ugotovili, da na spremembe deleža celuloze, hemiceluloze in lignina vpliva različna uporaba lepila (MF, UF), proces izdelave ivernih plošč, drevesna vrsta, ter ionizirajoče sevanje.

Language:Slovenian
Keywords:iverne plošče, kemijska zgradba, FT-IR spektroskopija
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2007
Publisher:[I. Dolinšek]
Number of pages:VIII, 34 f.
Place:Ljubljana
UDC:630*862.:630*813
COBISS.SI-ID:1600905 Link is opened in a new window
Views:541
Downloads:137
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Secondary language

Language:English
Abstract:
Our aim was to find chemical structure of particleboards using FT-IR spectroscopy. Analysis based on shining through samples with light wave frequency from 400 cm-1 to 4000 cm-1 by measuring transparency or quantity of absorbed light, depending on the wave length. Spectra were measured using DRIFT (Diffuse Reflectance Infrared Fourier Transform) technique, which is most frequent for dust analysis (in our example ground particle). We used particleboards from Russia, Italy and Slovenia. One particleboard sample was glued together with melamine-formaldehyde, others with urea-formaldehyde glue. In receiving spectra from 400 cm-1 to 4000 cm-1, we concentrated on wave range from 650 cm-1 to 1750 cm-1. In that range, functional group cellulose, hemi-cellulose and lignin in wood occur. Using FT-IR spectroscopy we determined chemical structure in particleboards or functional group cellulose, hemi-cellulose and lignin. It was found out that by comparing FT-IR spectra of particleboards the ratio of cellulose, hemi-cellulose and lignin is changed, influenced by different use of glue (MF, UF), process of making particleboards, tree species and ionizing radiation.

Keywords:particleboard, chemical structure, FT-IR spectroscopy

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