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Cellulose sample was isolated from pinewood by Kürschner-Hoffer method. Degradation of cellulose in a water suspension was conducted using laboratory homogeniser with rotating knives. The resulting cellulose was analysed by size exclusion chromatography to obtain molar mass. A simple zero-order kinetic model was applied to approximate the experimental data and degradation rate constants were estimated...
Four methods of cellulose preparation was applied for samples of natural cellulose from Merck and pinewood. The methods insist on successive solvent exchanges, which allows cellulose structure to open for the action of LiCl/dimethylacetamide. The samples were investigated by size exclusion chromatography in order to obtain molar mass distribution of cellulose. The results confirm that the activation...
1R spectrophotometry was applied to investigate chemical composition of water extracts of after-use particle boards. The samples of mechanically and hydrothermally fragmented particle boards were analysed. Pure particles of beech, alder and a mixture of pine-spruce wood were used as the reference material, along with the sample of cured urea- formaldehyde resin and ammonium chloride as curing agent...
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