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

doi:10.7523/j.issn.2095-6134.2017.06.003

Abstract

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

CLC Number:

O636.1

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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