麦秸纤维素在离子液体与有机溶剂复合体系中的溶解  

Dissolution of wheat straw cellulose in co-solvent of ionic liquids and organic solvent

作　　者：胡颜荟[1] 张娟[1] 任腾杰[1] 崔云[1] 赵地顺[1] 

机构地区：[1]河北科技大学化学与制药工程学院,河北石家庄050018

出　　处：《化学工程》2015年第4期1-5,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21106032);河北科技大学博士科研启动基金

摘　　要：采用一步法合成了N-烯丙基吡啶氯盐离子液体([APy]Cl),用傅里叶变换红外光谱(FT-IR)和质谱分析(MS)进行结构表征,并与5种有机溶剂[二甲基亚砜(DMSO)、N,N-二甲基甲酰胺(DMF)、N,N-二甲基乙酰胺(DMAC)、吡啶及BS-12]形成复合溶剂,考察了麦秸纤维素在其复合溶剂中的溶解性能。结果表明:质量分数2%的麦秸纤维素在[APy]Cl/DMSO复合溶剂中溶解性能较佳,当复合溶剂m([APy]Cl)∶m(DMSO)=1∶0.5、120℃时,75 min可溶解完全。利用IR和X射线衍射对再生前后的纤维素进行结构表征,可知[APy]Cl/DMSO复合溶剂对麦秸纤维素溶解为直接溶解过程,溶解后麦秸纤维素由晶型Ⅰ转变成晶型Ⅱ。N-allylpyridinium chloride ionic liquid （[ APy ] Cl ） was synthesized by one-step process, which was characterized by FF-IR and MS. The dissolubilities of wheat straw cellulose in [ APy ] Cl/co-solvent （ dimethylsulfoxide （DMSO） , N, N-dimethyl-1 formamide （DMF）, N, N-dimethylacetamide （DMAC）, pyridine or BS-12） were measured and compared. The results show that the solubility in [ APy] C1/DMSO is better than that in several other solvents under the same conditions. [ APy ] Cl /DMSO （ mass ratio 1 ： 0.5 ） can dissolve wheat straw cellulose within 75 min at 120 ℃. The wheat straw cellulose and the regenerated cellulose were analyzed by FT-IR, XRD. It reveals that there is no derivatization of reaction in the process of dissolution, and dissolving the wheat straw cellulose is a direct process. Furthermore, the crystal form of regenerated cellulose is transformed from cellulose I to cellulose Ⅱ.

关 键 词：离子液体 二甲基亚砜 麦秸纤维素 溶解 再生 

分 类 号：TQ352[化学工程]