Acetylation and characterization of xylan from hardwood kraft pulp

作者：Fundador Noreen Grace V; Enomoto Rogers Yukiko; Takemura Akio; Iwata Tadahisa^*

来源：Carbohydrate Polymers, 2012, 87(1): 170-176.

DOI：10.1016/j.carbpol.2011.07.034

• Hardwood xylan
• Xylan acetate
• Xylan acetate propionate
• Films
• Nanofibers

Alkaline treatment of eucalyptus hardwood kraft pulp with 10% NaOH yielded 6-8% xylan. The acetylation of the extracted xylan was carried in DMAC/LiCl/pyridine system to obtain a series of xylan acetates with different degrees of substitution (DS). Structure elucidation of xylan and xylan acetate was obtained by (1)H and (13)C NMR spectroscopy and other homonuclear and heteronuclear 2D-NMR techniques. Inversegated (13)C NMR was employed to determine the DS of xylan acetate. Furthermore, results also revealed equal reactivities at the C-2 and C-3 positions of xylan towards acetylation. Thermal stability, solubility behavior and nanofiber formation of xylan acetate were influenced by its DS values. The mechanical properties of xylan acetate propionate were also investigated.

• 出版日期2012-1-4