秸秆制备再生木质纤维素多孔球:原料溶液浓度的影响

doi:10.7523/j.issn.2095-6134.2017.06.003

中国科学院大学学报 ›› 2017, Vol. 34 ›› Issue (6): 667-674.DOI: 10.7523/j.issn.2095-6134.2017.06.003

秸秆制备再生木质纤维素多孔球:原料溶液浓度的影响

张华珍, 张志国, 郭存悦

中国科学院大学化学与化工学院, 北京 100049

收稿日期:2016-12-23 修回日期:2017-02-22 发布日期:2017-11-15
通讯作者: 张志国, 郭存悦
基金资助:
中国科学院大学校部教师与研究所科研合作专项（Y552017Y00）及校部青年教师科研启动基金（Y55103GY00）资助

Preparation of porous regenerated lignocellulose-beads from wheat straw:influence of the concentration of raw materials on the performance of beads

ZHANG Huazhen, ZHANG Zhiguo, GUO Cunyue

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-12-23 Revised:2017-02-22 Published:2017-11-15

摘要/Abstract

摘要： 秸秆的高值转化一直备受研究人员的关注。以[Bmim]Cl（1-丁基-3-甲基咪唑氯盐）溶解小麦秸秆，经乳化-固化-冻干过程制备再生秸秆木质纤维素多孔球。比较不同浓度秸秆溶液制备的木质纤维素球。结果如下：秸秆溶液浓度为5%时球形态和微观结构最好，具有最大的比表面积和氮吸附能力；较低浓度秸秆溶液制备的球粒径分布更窄；球中纤维素结晶度与秸秆溶液浓度呈正相关。研究表明，秸秆溶液浓度是制备秸秆木质纤维素多孔球的重要影响因素。本工作对研究再生秸秆木质纤维素多孔球的理化性质和优化制球工艺有指导意义。

关键词: 小麦秸秆, 再生木质纤维素多孔球, 木质纤维素, 离子液体

Abstract: The utilization of lignocellulose such as straw has spurred wide interests. In this study, wheat straw was employed to prepare porous regenerated lignocellulose-beads (LBs) by an emulsification-solidification-freeze drying process using[Bmim]Cl as a solvent. The lignocellulose-beads fabricated at four different concentrations of wheat straw-solution were compared. The beads derived from 5% wheat straw-solution was found to have regular morphology, uniform micro-structure, the biggest specific surface area, and the maximum ability of nitrogen adsorption rate. The thinner the wheat straw-solution was, the narrower the particle size distribution was. There existed a positive correlation between the degree of crystallinity of cellulose in LBs and the concentration of wheat straw-solution. These results suggest that the concentration of wheat straw-solution was the predominant factor for the preparation of porous regenerated lignocellulose-beads. This work contributes significantly to the understanding of physical and chemical properties of LBs and to the optimization of process parameters.

Key words: wheat straw, porous regenerated lignocellulose-beads, lignocellulose, ionic liquid

中图分类号:

O636.1

张华珍, 张志国, 郭存悦. 秸秆制备再生木质纤维素多孔球:原料溶液浓度的影响[J]. 中国科学院大学学报, 2017, 34(6): 667-674.

ZHANG Huazhen, ZHANG Zhiguo, GUO Cunyue. Preparation of porous regenerated lignocellulose-beads from wheat straw:influence of the concentration of raw materials on the performance of beads[J]. , 2017, 34(6): 667-674.

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秸秆制备再生木质纤维素多孔球:原料溶液浓度的影响

Preparation of porous regenerated lignocellulose-beads from wheat straw:influence of the concentration of raw materials on the performance of beads

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