CAJ | 학술논문

通过将酸性功能化离子液体与对纤维素具有溶解作用的离子液体进行复合,构建了一类新型的高效催化纤维素分解的体系,并采用热重(TG)分析方法,研究了复合离子液体中纤维素的分解行为.结果表明:复合离子液体中纤维素的分解温度明显降低,溶于离子液体中的纤维素可被酸性离子液体原位催化分解.纤维素的分解温度受离子液体催化剂的酸性及纤维素在复合离子液体中的溶解度影响明显:酸性越强,溶解度越大,纤维素的分解温度越低.
통과장산성공능화리자액체여대섬유소구유용해작용적리자액체진행복합,구건료일류신형적고효최화섬유소분해적체계,병채용열중(TG)분석방법,연구료복합리자액체중섬유소적분해행위.결과표명:복합리자액체중섬유소적분해온도명현강저,용우리자액체중적섬유소가피산성리자액체원위최화분해.섬유소적분해온도수리자액체최화제적산성급섬유소재복합리자액체중적용해도영향명현:산성월강,용해도월대,섬유소적분해온도월저.
Cellulose, the abundant and cost-ineffective resource, is considered to be a perfect alternative for the alleviation of energy crisis and environmental pollution. However, most processes for the treatment of cellulose are rigor currently as it is insoluble in water and conventional organic solvents due to its strong intra and inter-molecular hydrogen bonds, where the phase problem hampers its utilization widely. Here, we built a novel and efficient cooperative ionic liquid pairs system for the low temperature catalytic conversion of cellulose, which was constructed through the combination of an acidic ionic liquid catalyst and a cellulose soluble ionic liquid solvent. The catalytic decomposition behavior of microcrystal cellulose in this vigorous catalytic system was studied intensively by thermogravimetry (TG). Results show that the decomposition temperature of cellulose decreases greatly in all cooperative ionic liquid pairs, cellulose dissolved in ionic liquid solvents can be in situ catalytic decomposed by acidic ionic liquids. Furthermore, the decomposition temperature is dependent on the acidic strength of the ionic liquid catalysts, stronger acidity results in a lower decomposition temperature of the cellulose. Moreover, we found that cellulose can be decomposed at lower temperature when the ionic liquid with higher solubility of cellulose is used.