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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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