Cellulose liquefaction in acidified ethylene glycol |
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Authors: | Edita Jasiukaityt? Matja? Kunaver Matija Strli? |
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Institution: | (1) National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia;(2) Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, 1000 Ljubljana, Slovenia |
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Abstract: | Wood pulp cellulose was used in a study of its catalyzed liquefaction in the presence of ethylene glycol, p-toluene sulfonic acid monohydrate or sulphuric acid being the catalysts. For this study, microcrystalline cellulose, Whatman
filter paper no. 1 and cotton linters with molar masses of 76,000, 699,000 and 1,910,000 g mol−1, respectively were used. This liquefaction was studied by gravimetric determinations, by X-ray diffraction analysis of the
residual cellulose and by monitoring of the molar mass decrease over different time intervals, using size-exclusion chromatography.
The disordered regions, even of cellulose with the highest molar mass degraded in the initial minute of liquefaction. However,
the highly ordered cellulose regions remained relatively stable for a longer time. None the less, partial degradation of the
highly ordered regions of the cellulose was achieved. |
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Keywords: | Cellulose Catalyzed liquefaction Size-exclusion chromatography Ethylene glycol Crystallinity X-ray |
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