【摘要】 竹纤维组分综合利用的前提是有效实现其充分分离,对竹纤维组分分离工艺条件进行了研究。采用有机溶剂-酸-水混合体系,利用单因素试验和正交试验对主要因素进行分析优化,得到较优分离条件。结果表明,当液固比为10 mL/g,反应时间为4 h,有机溶剂体积分数为80%,硫酸体积分数为5%时,纤维素保留率为90.70%,半纤维素水解率为92.38%,木质素去除率为56.26%。该体系可较好地实现竹纤维组分的分离,不需高温高压,且有机溶剂可回收再利用。更多还原

【Abstract】 Comprehensive utilization of bamboo fiber component is on the premise that the effective realization of their full separation. Separation process conditions for bamboo fiber components are studied. Organic solvents-acid-water mixing system,single-factor test and orthogonal test are used to analyze and optimize the main factors to obtain optimal separation conditions. The results show that preservation rate of cellulose,hydrolysis rate of hemicelluloses and removal rate of lignin are 90. 70%,92. 38% and 56. 26%,respectively,under the optimal conditions: 10 of liquid-solid ratio,4 hours of reaction time,80% volume fraction of organic solvent and 5% volume fraction of sulfuric acid. This system can achieve a better separation of bamboo fiber component,without high temperature and high pressure,and the organic solvent can be recycled.更多还原