离子液体与水混合溶剂应用于微晶纤维素溶剂液化研究

doi:10.3969/j.issn.1673-5854.2014.01.001

Abstract

Abstract: Ionic liquid(IL)-water mixture solvent including solid acid catalysis Nafion^®NR50 was applied in cellulose pretreatment process. The pretreated cellulose was used in the process of phenol solvent liquefaction. To obtain some information about the effects of IL-water on cellulose, the characteristic of pretreated cellulose samples was analyzed. The degree of polymerization(DP) value of pretreated cellulose was tested. X-ray diffraction(XRD), Fourier transform infrared(FT-IR) spectroscopy, Gel permeation chromatography(GPC), thermogravimetric/differential thermal analysis(TG-DTA) and scanning electron microscope(SEM) were used to describe the influence of IL-water mixture on cellulose. It was suggested that the significant effect of cellulose by IL-water mixture pretreatment was responsible for the destruction of crystalline structure, the reduction of DP and surface structure. The residues of pretreated cellulose were 19 %, and the of untreated one was 29%. The result of XRD and GPC analysis also confirmed that the effect of faster liquefaction was due to the pretreatment process. These comparative results indicated that the IL-water mixture had shown the potentiality for the biomass pretreatment using in the field of solvent liquefaction processes for biomass-base materials.

Key words: Ionic liquid, Mixture solvent, Cellulose, Solvent liquefaction

CLC Number:

TQ35

WANG Qing-yue, CHEN Qi-yu. Application of Ionic Liquid and Water Mixture in Cellulose Solvent Liquefaction as Pretreatment Step[J]. bce, 2014, 48(1): 1-8.

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Application of Ionic Liquid and Water Mixture in Cellulose Solvent Liquefaction as Pretreatment Step

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