Homogeneous modification of cellulose in ionic liquid with succinic anhydride using N-bromosuccinimide as a catalyst.
The homogeneous chemical modification of cellulose with succinic anhydride was investigated in a solvent system containing 1-butyl-3-methylimidazolium chloride ionic liquid and dimethylsulfoxide using N-bromosuccinimide (NBS) as a catalyst. The results showed that the degree of substitution of the succinylated cellulosic samples, in the range of 0.24-2.31, noticeably increased as compared with the products without any catalysts, indicating that NBS was a novel efficient catalyst for cellulose succinoylation in ionic liquids. Fourier transform infrared and solid-state cross-polarization/magic angle spinning (13)C NMR spectroscopies also provided evidence of succinoylation reaction. The results indicated that the reaction of hydroxyl groups at C-6, C-2, and C-3 positions in cellulose occurred. The thermal stability of the succinylated cellulose was found to decrease upon chemical modification.
Liu
Chuan-Fu
CF
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Zhang
Ai-Ping
AP
Li
Wei-Ying
WY
Yue
Feng-Xia
FX
Sun
Run-Cang
RC
D001974:Bromosuccinimide / Q000737:chemistry*; D002384:Catalysis; D002482:Cellulose / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D015394:Molecular Structure; D013387:Succinic Anhydrides / Q000737:chemistry*
D052578:Ionic Liquids; D013387:Succinic Anhydrides; C031801:succinic anhydride; D002482:Cellulose; D001974:Bromosuccinimide