Laboratory of Polymer Chemistry, Department of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, Finland.
Laboratory of Organic Chemistry, Department of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, Finland.
Carbohydr Polym. 2014 Nov 26;113:67-76. doi: 10.1016/j.carbpol.2014.07.001. Epub 2014 Jul 9.
In this work, interactions between cellulose and ionic liquids were studied calorimetrically and by optical microscopy. Two novel ionic liquids (1,5-Diazabicyclo[4.3.0]non-5-enium propionate and N-methyl-1,5-diazabicyclo[4.3.0]non-5-enium dimethyl phosphate) and 1-ethyl-3-methylimidazolium acetate-water mixtures were used as solvents. Optical microscopy served in finding the extent of dissolution and identifying the dissolution pattern of the cellulose sample. Calorimetric studies identified a peak relating to dissolution of cellulose in solvent. The transition did, however, not indicate complete dissolution, but rather dissolution inside fibre or fibrils. This method was used to study differences between four cellulose samples with different pretreatment or origins.
在这项工作中，通过量热法和光学显微镜研究了纤维素与离子液体之间的相互作用。使用了两种新型离子液体（1,5-二氮杂双环[4.3.0]壬-5-烯丙酸盐和 N-甲基-1,5-二氮杂双环[4.3.0]壬-5-烯基二甲磷酸盐）和 1-乙基-3-甲基咪唑𬭩乙酸盐-水混合物作为溶剂。光学显微镜用于寻找纤维素样品的溶解程度和识别溶解模式。量热研究确定了与纤维素在溶剂中溶解相关的峰。然而，该转变并没有表明完全溶解，而是在纤维或原纤内部溶解。该方法用于研究具有不同预处理或来源的四种纤维素样品之间的差异。
