期刊
CELLULOSE
卷 16, 期 3, 页码 393-405出版社
SPRINGER
DOI: 10.1007/s10570-009-9288-y
关键词
Cellulose; Catalyzed liquefaction; Size-exclusion chromatography; Ethylene glycol; Crystallinity; X-ray
资金
- Ministry of Higher Education, Science and Technology of the Republic of Slovenia and Slovenian Research Agency [P2-0145]
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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