木材纤维素在LiCl/DMAc溶剂体系中的溶解特性

为了使木材纤维素改性以制备功能材料，该文研究了木材纤维素在LiCl/DMAc中的溶解特性，确定LiCl在木材纤维素溶剂体系中的重要作用，进一步验证了溶解机理，并对溶解产物进行了红外光谱分析.结果表明:①LiCl在LiCl/DMAc溶剂体系中起重要的作用，可与木材纤维素生成中间络合物，减少纤维素分子之间的氢键作用，提高其溶解性能.②非水溶剂法是对木材纤维素溶解的较好方法，红外谱图分析表明，在纤维素的特征吸收宽峰—OH的位置(3 400 cm-1)，其吸收强度大大减小，即纤维素羟基缔合程度减小，分子间氢键受到破坏.③LiCl/DMAc溶剂体系能有效地溶解木材纤维素，为木材纤维素改性制备功能材料提供了较好的均相合成体系. 

Research on the dissolubility of wood_cellulose in LiCl/DMAc solvent system

This experiment used LiCl/DMAc solvent system to dissolve wood-cellulose with the aim of broadening the application of wood-cellulose. The authors studied the dissolubility complexion of wood-cellulose in LiCl/DMAc, and ascertain the importance of LiCl in cellulose solvent to validate the dissolution mechanism through infrared spectrometry. The results are as follows: ①LiCl, which can build complex with cellulose, has the important function in LiCl/DMAc solvent system, and the dissolubility performance is optimized when the hydrogen bond is cut down between the cellulose molecule. ②The non-aqueous solvent system is a better solution to dissolve wood_cellulose, as it is found in infrared spectrometry that the absorption intensity of cellulose —OH(3 400 cm-1) decreases and meants that the association of —OH in cellulose groups reduces, with the hydrogen bond be destroyed. ③Wood-cellulose can be dissolved in LiCl/DMAc solvent thoroughly, and can be modified better for new functional material in this homogeneous synthesizing solvent system.44316