Department of Chemical Engineering, Faculty of Chemistry, Complutense University of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain.
Carbohydr Polym. 2013 Feb 15;92(2):1946-52. doi: 10.1016/j.carbpol.2012.11.057. Epub 2012 Nov 28.
Cellulose is currently separated from lignocellulosic materials using non-environmentally friendly processes. The development of new methods for treating biomass and separating cellulose remains a challenge and would be very useful in the context of the biorefinery philosophy. In this work, cellulose has been regenerated from solutions of Pinus radiata and Eucalyptus globulus woods in 1-allyl-3-methylimidazolium chloride. Wood dissolution was performed in a microwave oven at 120 °C for 20 min. Cellulose was characterized and compared to the reference material, microcrystalline cellulose (MCC). Regenerated celluloses showed lower crystallinity and thermal stability than MCC, although the ash contents at 400 °C were higher than in MCC. The regenerated celluloses were obtained without lignin and almost free from hemicellulose. Furthermore, cellulose was not significantly degraded in the dissolution process of both woods. The insoluble solids showed higher content of lignin and hemicellulose than the raw materials.
纤维素目前是通过非环保的方法从木质纤维素材料中分离出来的。开发处理生物质和分离纤维素的新方法仍然是一个挑战，如果能在生物精炼厂的理念下进行开发，将会非常有用。在这项工作中，从辐射松和桉树的 1-烯丙基-3-甲基咪唑氯化物溶液中再生了纤维素。在微波炉中于 120°C 下加热 20 分钟以溶解木材。对纤维素进行了表征，并与对照材料微晶纤维素（MCC）进行了比较。再生纤维素的结晶度和热稳定性低于 MCC，尽管在 400°C 时的灰分含量高于 MCC。在没有木质素的情况下获得了再生纤维素，并且几乎不含半纤维素。此外，在两种木材的溶解过程中，纤维素没有明显降解。不溶性固体的木质素和半纤维素含量高于原料。
