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Dissolution and regeneration of cellulose in a functionalized ionic liquid 1-(2-chloroethyl)-3-methyl imidazolium chloride
HUANG Mingming 1,CHEN Feiran 2,MA Hao 2,ZHOU Bo 2,LI Yiqun 2 *
1.School of Science and Technology, Jinan University, Guangzhou 510632
2.Department of Chemistry, Jinan University, Guangzhou 510632
*Correspondence author
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Funding: the Guangdong Natural Science Foundation（No.No. 10151063201000051）, the National Natural Science Foundation of China （No.Nos. 21072077, 20672046 ）
Opened online:22 April 2013
Accepted by: none
Citation: HUANG Mingming,CHEN Feiran,MA Hao.Dissolution and regeneration of cellulose in a functionalized ionic liquid 1-(2-chloroethyl)-3-methyl imidazolium chloride[OL]. [22 April 2013] http://en.paper.edu.cn/en_releasepaper/content/4538016
 
 
Functionalized ionic liquid 1-(2-chloroethyl)-3-methylimidazolium chloride ([ClC2MIM]Cl) used as the powerful and nonderivatizing solvent for dissolution and regeneration of cellulose is reported here. Microcrystalline cellulose can be dissolved in this functionalized ionic liquid without activation or pretreatment with the dissolubility of 20% at 100?C by conventional heating. Cellulose can be easily regenerated from its ionic liquid solutions by addition of deionized water. After its regeneration, the ionic liquids can be recovered and reused. The regenerated cellulose was characterized by XRD, FT-IR, TGA and SEM. The XRD, FT-IR indicated that the regenerated cellulose has the same chemical structure with the initial one. But the SEM shows the morphology of regenerated cellulose is significantly changed from its microfibrils to relatively homogeneous amorphous microstructures. The TGA exhibited that the regenerated sample has a lower onset temperature at 242.4?C for decomposition and gives a higher residual masses after the decomposition step. The possible mechanism of the dissolution of cellulose in [ClC2MIM]Cl is also discussed in this paper. Therefore, this research has shown that ionic liquid [ClC2MIM]Cl can be used as nonderivatizing solvents for cellulose.
Keywords:dissolution; regeneration; 1-(2-chloroethyl)-3-methylimidazolium chloride; microcrystalline cellulose
 
 
 

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