Analiza termično modificiranega lesa z infrardečo spektroskopijo in termično analizo

diplomsko delo (univerzitetni študij)

Boštjan Lesar (Author), Vesna Tišler (Reviewer), Franc Pohleven (Mentor)

Abstract

Vzorce smreke in jelke smo modificirali v vakuumu pri temeperaturah od 170 do 215 °C. Modificiranim vzorcem smo določili izgubo mase, ki je posledica termične obdelave. Posneli smo infrardeče spektre termično modificiranih in kontrolnih vzorcev v transmisijski tehniki. V dobljenih spektrih smo izmerili površine posameznih trakov ter jih primerjali z referenčnima trakovoma pri 2900 in 1510 cm(na-1), tako da smo dobili relativne površine posameznih trakov, ki smo jih primerjali z izgubo mase pri termični modifikaciji. Ugotovili smo, da obstaja linearna povezava pri trakovih: 1636, 1605, 1035 in 897 cm(na-1). Termično analizo smo izvajali na kontrolnih vzorcih in vzorcih smreke, modificiranih pri temperaturah 190 in 210 °C. Izgubo mase, ki smo jo zabeležili pri termični analizi, smo primerjali s tisto pri termični modifikaciji in ugotovili, da sta v linearni odvisnosti. Z naraščanjem izgube mase vzorcev, kot posledico termične modifikacije, se zmanjšuje izguba mase pri termični analizi.

Keywords

termična modifikacija lesa;infrardeča spektroskopija;termična analiza;

Data

Language:	Slovenian
Year of publishing:	2005
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[B. Lesar]
UDC:	630*841
COBISS:	1272457
Views:	1546
Downloads:	391
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Analysis of thermal modified wood with infrared spectroscopy and thermal analysis
Secondary abstract:	Spruce and fir samples were thermally modified in vacuum at temperatures from 170 to 215 °C. The mass losses caused by heat treatment were evaluated for modified samples. FTIR spectra of the heat treated and control samples were recorded in the transmision technique. In these spectra, the areas of single bands were measured and compared to the reference bands at 2900 and 1510 cm-1 to get the relative areas of single bands. Relative areas were then compared to the mass loss caused by thermal modification, and a linear relationship was observed for bands at 1636, 1605, 1035 and 897 cm-1. TG was also used for analysis of control spruce samples and samples modified at 190 and 210 °C. Mass losses observed by thermal analysis between 100 and 800 °C are linearly proportional with the mass losses caused by a heat treatment. Increasing the mass loss caused by a heat treatment the mass loss detected by the thermal analysis decreases.
Secondary keywords:	thermal modification of wood;infrared spectroscopy;thermal analysis;
File type:	pdf
Type (COBISS):	Undergraduate thesis
Pages:	XI, 60 f.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;agriculture and related sciences and techniques;forestry;farming;wildlife exploitation;kmetijstvo ter sorodne vede in tehnologije;forestry;gozdarstvo;forest products and their utilization;gozdni proizvodi in njihova uporaba;
ID:	20941