【摘要】 研究1-丁基-3-甲基咪唑氯盐(BmimCl)和1-乙基-3-甲基咪唑乙酸盐(EmimOAc)两种咪唑类离子液体在不同条件下对玉米秸秆的溶解和再生情况.采用傅里叶变换红外光谱(IR)、X-射线粉末衍射(XRD)、扫描电镜(SEM)热重分析(TGA)手段分析溶解前后秸秆的化学结构与结晶结构.结果表明,秸秆纤维素溶解再生后结晶度变低,热稳定性也略有降低;离子液体是秸秆的直接溶剂,秸秆在其中并未发生衍生化反应.更多还原

【Abstract】 Dissolution of cornstalk in 1-butyl-3-methylimidazolium chloride(BmimCl) and 1-ethyl-3-methylimidazolium acetate(EmimOAc) was studied.Chemical structure and crystalline form of cornstalk before and after dissolution were analyzed by means of FT-IR,TGA,SEM,and XRD.The results show that the crystallinity and thermostability of the regenerated cellulose-rich material slightly decreased after dissolution.Cornstalk directly dissolved in ionic liquids,and no derivatization reaction occurred.更多还原