摘要
对竹纤维组分的分级分离工艺进行了研究。以乙醇为溶剂的分级分离条件:第一级分离中NaOH2.1%、H2O21.5%,第二级分离中NaOH2.4%、H2O2 2.0%,第三级分离中NaOH2.4%、H2O2 1.0%。NaOH对各级半纤维素、木质素和纤维素的结构影响程度依次降低,而H2O2对各组分的结构影响不大。乙醇可同时提取木质素和半纤维素,而乙酸乙酯和丙酮不能提取半纤维素;乙酸乙酯提取的木质素具有较高的得率和纯度。丙酮和乙醇对纤维素、木质素的结构影响不大,而乙酸乙酯对纤维素和木质素的结构影响较大。
Fractional separation of bamboo fiber was studied.With ethanol as solvent,the suitable conditions of fractional separation are 2.1% of NaOH and 1.5% of H2O2 in the first fractional separation,2.4% of NaOH and 2.0% of H2O2 in the second fractional separation and 2.4% of NaOH and 1.0% of H2O2 in the third fractional separation.Effects of NaOH on the structures of hemicellulose,lignin and cellulose gradually decrease,while H2O2 has little influence on it.Ethanol can simultaneously extract lignin and hemicellulose,while ethyl acetate and acetone can′t extract hemicellulose.The higher yield and purity of lignin extracted by ethyl acetate are achieved.Ethanol and acetone have little influence on the structures of cellulose and lignin,while ethyl acetate has a great influence on it.
出处
《生物质化学工程》
CAS
2010年第3期11-16,共6页
Biomass Chemical Engineering
基金
湖南工程学院大学生科技创新基金(0812)
关键词
竹纤维
分级分离
提取条件
bamboo fiber
fractional separation
extraction condition
