离子液体[bmim]Cl对甘蔗渣中纤维素的溶解与再生

化工进展

离子液体[bmim]Cl对甘蔗渣中纤维素的溶解与再生

石锦志1，2，李状1，2，廖兵1，付铁柱1，庞浩1

1中国科学院广州化学研究所，中国科学院纤维素化学重点实验室，广东广州 510650；2中国科学院研究生院，北京 100049

出版日期:2010-11-05 发布日期:2010-11-05

Dissolution and regeneration of cellulose in sugarcane bagasse from ionic liquid [bmim]Cl

SHI Jinzhi1，2，LI Zhuang1，2，LIAO Bing1，FU Tiezhu1，PANG Hao1

1Key Laboratory of Cellulose and Lignocellulosics Chemistry，Guangzhou Institute of Chemistry，Chinese Academy of Sciences，Guangzhou 510650，Guangdong，China；2Graduate University of the Chinese Academy of Sciences，Beijing 100049，China

Online:2010-11-05 Published:2010-11-05

摘要/Abstract

摘要：

研究了利用离子液体1-丁基-3-甲基咪唑氯盐（[bmim]Cl）对甘蔗渣中的纤维素直接溶解并再生，考察了温度、NaOH浓度以及溶解时间对溶解率的影响，同时分别通过FT-IR、X射线衍射及热失重对再生纤维素的结构、结晶性及热性能进行了研究。实验表明：温度80 ℃、NaOH浓度为1%、溶解时间为1.5 h时，离子液体[bmim]Cl对甘蔗渣有最好的溶解性，溶解率可达到48%。离子液体主要溶解甘蔗渣中的纤维素，且为非衍生化的直接溶解，再生后的纤维素结晶形态由纤维素Ⅰ变为Ⅱ，热稳定性能同纯纤维素相比有所降低。

Abstract:

1-Butyl-3-methylimidazolium chloride（[bmim]Cl）was used to dissolve cellulose in sugarcane bagasse and cellulose regeneration. Influence of temperature，NaOH concentration and time on the dissolution of cellulose in sugarcane bagasse was investigated. The regenerated cellulose from ionic liquid（IL）was characterized using X-ray diffraction，FT-IR spectroscopy and TGA. Results showed that [bmim]Cl is a good solvent for cellulose and at optimal conditions of 80℃ for 90min with 1% NaOH solution for cellulose activation，by which 48% of dissolution rate of cellulose was achieved. It was also observed that [bmim]Cl is a non-detribalizing solvent for cellulose. The regenerated cellulose from IL showed a crystalline form of cellulose II and was less thermally stable than pure cellulose.

石锦志1，2，李状1，2，廖兵1，付铁柱1，庞浩1. 离子液体[bmim]Cl对甘蔗渣中纤维素的溶解与再生 [J]. 化工进展.

SHI Jinzhi1，2，LI Zhuang1，2，LIAO Bing1，FU Tiezhu1，PANG Hao1. Dissolution and regeneration of cellulose in sugarcane bagasse from ionic liquid [bmim]Cl[J]. Chemical Industry and Engineering Progree.