机械力与碱处理对不同木质纤维在LiCl/DMSO溶剂体系中溶解性能的影响比较  

Influences of Mechanical and Alkali Treatment on Dissolution of Lignocellulosic Biomass in LiCl/DMSO

作　　者：任浩 杨艳 翟华敏 REN Hao;YANG Yan;ZHAI Hua-min(College of Light Industry and Food Engineering,NanJing Forestry University,Nanjing 210037,China)

机构地区：[1]南京林业大学轻工与食品学院,江苏南京210037

出　　处：《纤维素科学与技术》2018年第3期9-15,31,共8页Journal of Cellulose Science and Technology

基　　金：国家自然科学基金(31070524);南京林业大学杰出青年基金(NLJQ2015-005)

摘　　要：木质纤维素原料由于具有复杂的细胞壁结构,其组分的溶解和分离成了其高效转化和利用的难点和关键所在。Li Cl/DMSO溶剂体系作为木质纤维素的可全溶体系开发以来,在木质纤维素的转化和利用方面备受关注。木质纤维原料在应用于LiCl/DMSO溶剂体系之前,通常都是经过一定的机械力预处理的。鉴于木质纤维原料的粒径大小及化学组分对溶解性能影响很大,粒径越小,木质纤维原料的结晶度越低,越利于溶剂分子的渗透,本研究采用不同的球磨时间及不同的NaOH/Na_2S制浆工艺条件预处理杨木原料,制备粒径大小、化学结构及组成有很大差别的系列试样,在相同浓度的8%LiCl/DMSO溶剂体系下比较、探讨不同球磨时间及不同程度的化学制浆处理对杨木在LiCl/DMSO溶剂体系中的溶解性能的影响,同时探讨相似的预处理及溶解条件下杨木和麦草溶解性能的差异。The cell walls of lignocellulosic materials have complex structure, the dissolution and separation of which compositions has become the key of its efficient conversion and utilization. Since LiCl/DMSO solvent system had been developed, it caused a major concern in the research field of lignocellulose utilization. Before lignocellulosic raw materials were applied to LiCl/DMSO solvent systems, usually it will be pretreated by a certain mechanical force. The particle size and chemical compositions of lignocellulosic have great influence on its dissolve performance. The smaller the particle size and the lower crystallinity, the easier the solvent permeation is. The different physics or chemistry pretreatment methods will greatly affect particle size, chemical structure and composition, which further affect dissolve performance. The influences of mechanical and chemical treatment on the dissolution of poplar and wheat straw in 8% LiCl/DMSO were firstly compared to study.

关 键 词：木质纤维素 机械力 化学作用 LiCl/DMSO溶剂体系 溶解性能 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]