DBU/DMSO/CO<sub>2</sub>溶剂体系中纤维素聚离子液体的合成及性质

doi:10.11896/cldb.18090142

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Abstract In view of environmental pollution and the non-renewable problem of petroleum resources, it is of great significance to develop renewable resources that are environmentally friendly and widely available for modification.The present study, one of the most abundant biomass resources, cellulose, was dissolved and activated in the DBU/DMSO/CO₂ reversible ionic liquid dissolution system, and then was chemically modified by 2,3-pyridine dicarboxylic anhydride to synthesize pyridine cationic cellulose polyionic liquid. The impact of reaction temperature, molar ratio and reaction time on the degree of substitution was studied. As can be seen from the results, the product achieved the highest substitution degree of 2.18, under the molar ratio of 2,3-pyridine dicarboxylic anhydride to cellulose anhydroglucose unit (AGU) of 1.2∶1, the reaction temperature of 80 ℃, and the reaction time of 4 h. Fourier transform infrared spectroscope (FTIR) and nuclear magnetic resonance (NMR) were employed to characterize the structure of cellulose polyionic liquid. In addition, the synchronous thermal analyzer was adopted to measure the thermal properties of the cellulose polyionic liquid, and its initial decomposition temperature of 152 ℃ was obtained. The proposed approach for preparing cellulose polyionic liquid exhibited simple operation process, no environmental pollution and by-products generally, showing certain guiding significance for the development of new cellulose derivatives.

Key words： DBU/DMSO/CO₂ polyionic liquid cellulose 2,3-pyridine dicarboxylic anhydride chemical modification

Published: 16 May 2019

CLC number:

TQ352.2

Fund:This work was financially supported by the National Natural Science Foundation of China (21774028,21574030).

About author:: Qian Wang graduated from Guizhou University in July 2018. She studied at the College of Materials and Metallurgy, Guizhou University from September 2015 to July 2018. She is mainly engaged in research in the field of green polymer new materials.
Haibo Xie, Professor, doctoral supervisor, School of Materials and Metallurgy, Guizhou University. In 2006, he obtained a Ph.D. in organic chemistry from Changchun Yinghua Institute of Chinese Academy of Sciences. From July 2006 to February 2010, he worked as a postdoctoral and junior researcher at the University of North Carolina, Biomass Resources, Dublin City University, Ireland, and the National Cell and Biotechnology Research Center. In March 2015, he went to the Department of Polymer Science and Engineering at the School of Materials and Metallurgy, Guizhou University. He has published more than 50 SCI papers, and he has accumulated more than 1 800 times. Co-editor edited 1 English academic monograph, participated in writing 6 Chinese and English monographs (including Chinese one); applied for 20 Chinese patents in the past 5 years.

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Cite this article:

WANG Qian,XIE Haibo. Cellulose Polyionic Liquids in DBU/DMSO/CO₂ Solvent System: Synthesis and Properties[J]. Materials Reports, 2019, 33(10): 1768-1772.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.18090142 OR http://www.mater-rep.com/EN/Y2019/V33/I10/1768

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