离子液体对甘蔗渣的微波溶解工艺与性能研究

以甘蔗渣为原料,利用微波辅助加热方法,对其在离子液体中的溶解工艺和性能进行了研究。分析了微波功率、温度、甘蔗渣含量对溶解时间的影响,并确定最佳溶解工艺。采用红外、X射线衍射、热重分析等手段对溶解前后的甘蔗渣纤维素结构进行分析。结果表明:甘蔗渣纤维素在离子液体中的溶解属于直接溶解,纤维素经离子液体溶解和再生后,结晶度下降,晶型由纤维素Ⅰ型转变为纤维素Ⅱ型,并且其热分解温度降低,热稳定性略有下降。

Study on Dissolved Technology of Bagasse in Ionic Liquid by Microwave and Its Performance

The dissolved technology of bagasse in ionic liquid by using microwave auxiliary heating method was studied,the performance of bagasse cellulose was analyzed,the influence of microwave power,temperature and bagasse content on the dissolved time was investigated,and the optimal dissolved condition was obtained.Then the structure of bagasse cellulose before and after dissolution was analyzed by using infrared ray,X-ray diffraction and thermo-gravimetric analysis methods.It was shown that the ionic liquid was a direct solvent for bagasse cellulose.After dissolution and regeneration of bagasse cellulose in ionic liquid,the crystallinity of bagasse cellulose decreased,its crystalline form transformed from cellulose Ⅰ type to cellulose Ⅱ type,its thermal decomposition temperature reduced,and its thermal stability was slightly decreased.