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Original Article | Open Access

Structure Elucidation of Hydroxypropyl Cellulose Homogenously Prepared from NaOH/Urea Aqueous Solution

HaiSong Qi1,2, Tao Song1, Fachuang Lu1( )
South China University of Technology, School of Light Industry and Engineering, Guangzhou, Guangdong Province, 510640, China
Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, D-01069 Dresden, Germany
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Abstract

Hydroxypropyl celluloses (HPC) were homogenously synthesized by the reaction of cellulose with propylene oxide in NaOH/urea aqueous solution. Water-soluble HPC with molar degree of substitution (MSNMR) in the range of 0.52~0.78 was prepared from microcrystalline cellulose, cotton linters, and spruce sulfite pulp. The structure of the HPC samples was characterized by means of FT-IR, NMR, gas chromatography (GC), and size exclusion chromatography (SEC) analyses. Three types of cellulose samples with different molecular weights were found to dissolve well in the NaOH/urea solvent with no obvious differences in reactivity and regioselectivity. The relative reactivity of hydroxyl groups in the glycosyl unit was in the following order: O-6 > O-2 > O-3. In addition, the results of the study indicated that the tandem reaction during hydroxypropylation could be ignored.

Keywords

hydroxypropyl celluloseNaOH/urea aqueous solutionstructurehomogenous synthesisgas chromatography analysis

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Paper and Biomaterials
Volume 1 Issue 2,
October 2016
Pages 1-7
DOI: 10.26599/PBM.2016.9260009
Cite this article:
Qi H, Song T, Lu F. Structure Elucidation of Hydroxypropyl Cellulose Homogenously Prepared from NaOH/Urea Aqueous Solution. Paper and Biomaterials, 2016, 1(2): 1-7. https://doi.org/10.26599/PBM.2016.9260009

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Received: 23 May 2016
Accepted: 01 July 2016
Published: 25 October 2016
© 2016 Published by Paper and Biomaterials Editorial Board

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
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