Resin adsorption-ultrafiltration synergistic separation of alkaline extracted hemicellulose from bagasse

被引：0
作者：
Du J. [1 ,2 ]
Gong Z. [1 ]
Huang C. [3 ]
Liang C. [1 ,2 ]
Yao S. [1 ,2 ]
Liu Y. [1 ,2 ]
机构：
[1] School of Light Industry and Food Engineering, Guangxi University, Nanning
[2] Guangxi Key Laboratory of Cleaning Pulp & Papermaking and Pollution Control, Guangxi University, Nanning
[3] Co-Innovation Center for Efficient Processing and Utilization of Forest Products, Nanjing Forestry University, Nanjing
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 04期
关键词：
Bagasse; Hemicellulose; Lignin; Membrane separation; Separation and purification; XAD resin;
D O I：
10.11949/0438-1157.20201172
中图分类号：
学科分类号：
摘要：
Aiming at the problem of high lignin content in the hemicellulose extracted by alkaline method and difficult purification, the hydrophobic resin adsorption-ultrafiltration is used for cooperative treatment. In this study, the effect of different methods on the purification and separation of hemicellulose was explored through the method of macroporous resin adsorption and ultrafiltration technology. Ion chromatography (IC), ultraviolet spectrophotometer (UV), gel permeation chromatography (GPC) and thermogravimetric analysis (TGA) were used to analyze chemical composition, molecular weight, thermal stability and other characteristics of the separated and purified hemicellulose. The results show that the resin adsorption-membrane ultrafiltration treatment can effectively remove lignin and obtain hemicellulose with higher molecular weight. No significant changes are found in the molecular backbone structure, and the thermal stability is slightly improved. The side chain unit of hemicellulose after resin adsorption has obvious changes. The hemicellulose with smaller molecular weight has more side chain lignin unit structure, and is mostly connected to carbohydrates by phenyl glycosidic bonds (PhGlc). Through the cooperative treatment of resin adsorption and ultrafiltration, hemicellulose with different side chain units and lignin content can be obtained, which provides a basis for expanding the utilization value of hemicellulose. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：2139 / 2147
页数：8
相关论文
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