Abstract:

Regenerated cellulose film is prepared successfully from sugarcane bagasse cellulose in ionic liquid 1-allyl-3-methylimidazolium chloride (［Amim］Cl).Its dissolution process was viewed by polarizing microscope.Properties and structures of the regenerated cellulose films obtained were characterized by infrared spectroscopes, scanning electron microscopy, X-ray diffraction, thermogravimetry (TGA) and strength test.The results showed that ［Amim］Cl is a good non-derivatizing solvent for sugarcane bagasse cellulose whose crystalline form transformed completely from cellulose Ⅰ to cellulose Ⅱ after regenerated directly from ［Amim］Cl solution.The cellulose film obtained by regeneration showed a dense structure and its thermal stability and tensile strength could be up to 292℃ and 144 MPa respectively.

Key words:

离子液体, 蔗渣纤维素, 溶解, 再生

摘要：

以蔗渣纤维素为原料, 在1-烯丙基-3-甲基咪唑氯盐（［Amim］Cl）离子液体中，制备出蔗渣纤维素再生膜。通过偏光显微镜观察了蔗渣纤维素的溶解过程，采用红外光谱、扫描电镜、X射线衍射、热重及力学性能等分析测试手段，对蔗渣纤维素及再生膜进行表征，结果表明：未经活化的蔗渣纤维素可快速、直接溶解在离子液体中，再生前后蔗渣纤维素发生了从纤维素Ⅰ到纤维素Ⅱ的晶型转变，蔗渣纤维素再生膜具有致密的结构，热力学稳定性达到292℃，拉伸强度高达144 MPa。

关键词:

离子液体, 蔗渣纤维素, 溶解, 再生