沙柳与柠条混合原料碱性过氧化氢法分离的纤维素特性研究  

Celluloses of Salix psammophila and Caragana korshinskii Kom.Obtained by Alkaline Hydrogen Peroxide Process

作　　者：许凤[1] 钟新春[1] 孙润仓[2] 

机构地区：[1]齐齐哈尔大学轻工纺织学院,黑龙江齐齐哈尔161006 [2]华南理工大学制浆造纸国家重点实验室,广东广州510640

出　　处：《林产化学与工业》2006年第2期19-22,共4页Chemistry and Industry of Forest Products

基　　金：国家'十五'科技攻关资助项目(2002BA517A09)

摘　　要：分析了沙柳(Salix psamm ophila)与柠条(Caragana korshinskiiKom.)质量比为1∶1的混合原料的化学组成,在NaOH 18%(质量分数)、反应温度165℃、H2O23%(质量分数)、反应时间90 m in、液固比4∶1(mL∶g)的条件下降解木质素与半纤维素,分离纤维素,计算纤维素制备物的得率及粘度。采用GC、HPLC、FT-IR及13C NMR分析了纤维素制备物的特性,结果表明,碱性过氧化氢法能高效降解大部分木质素,得到的纤维素制备物中残余木质素含量较低(酚醛和酚酸总量为4.39%),纤维素纯度较高(葡萄糖含量84.68%),纤维素结晶度可能升高。The chemical compositions of the branches of Salix psammophila and Caragana korshinskii Kom. were assessed. Degradation of mixture of these two-shrubs was carried out by non-sulfur alkaline hydrogen peroxide （HPA） process under optimized conditions （NaOH 18 %, reaction temperature 165 ℃, charge of hydrogen peroxide 3 %, time 90 min, liquid-solid ratio 4 ： 1 （ mL ： g） ） selected according to the previous orthogonal experiment. Results indicated that lignin and hemicelluloses were significantly degraded by alkaline hydrogen peroxide with only small amount of associated lignin （ 4.39 % phenolic composition ） on cellulose. Cellulose had relatively high purity （ glucose content 84.68 % ）. Characterizations of cellulose preparation were studied by using FT-IR, GC, HPLC and ^13C NMR techniques.

关 键 词：沙柳 柠条 碱性过氧化氢法 木质素 纤维素 

分 类 号：TQ351.011[化学工程]