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International Journal of Polymer Science
Volume 2016 (2016), Article ID 2361284, 9 pages
http://dx.doi.org/10.1155/2016/2361284
Research Article

Reaction Behavior of Cellulose in the Homogeneous Esterification of Bagasse Modified with Phthalic Anhydride in Ionic Liquid 1-Allyl-3-methylimidazium Chloride

1State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
2College of Materials and Energy, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, South China Agricultural University, Guangzhou 510642, China
3Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China

Received 3 June 2016; Revised 11 August 2016; Accepted 31 August 2016

Academic Editor: Antje Potthast

Copyright © 2016 Hui-Hui Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In order to elucidate the reaction behavior of cellulose component in bagasse, the homogeneous phthalation of bagasse was investigated comparatively with the isolated cellulose in 1-allyl-3-methylimidazium chloride (AmimCl) with phthalic anhydride (PA) at the dosage of 10–50 mmol/g. The phthalation degrees of bagasse and the isolated cellulose were in the range of 5.66% to 22.71% and 11.61% to 44.11%, respectively. A phthalation degree increase of cellulose was proportional to phthalic anhydride dosage due to its regular macromolecular structure and followed the equation . FT-IR and 2D HSQC NMR analyses confirmed the attachment of phthaloyl group. The phthalation reactivity of the three hydroxyls in the isolated cellulose followed the order of C-6 > C-2 > C-3, and the more selective phthalation to C-6 position was found in the cellulose component in bagasse. These results provide detailed understanding of the homogenous modification mechanism of lignocellulose.