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A facile ionic liquid approach to prepare cellulose fiber with good mechanical properties directly from corn stalks

查看全文 作　　者：Jiming [1,2]Yang;Xingmei [1,2]Lu;Yanqiang [1]Zhang;Junli [1]Xu;Yongqing [1,2]Yang;Qing [1,2]Zhou 高影响力作者 机构地区：[1]Beijing Key Laboratory of Ionic Liquids Clean Process,CAS Key Laboratory of Green Process and Engineering,State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing,100190,China;[2]School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing,100049,China高影响力机构 出　　处：《Green Energy & Environment》索引2020年第5卷第2期,共9页高影响力期刊 基　　金：This research was financially supported by the National Natural Science Foundation of China(No.21878292,No.21606240,No.21878314);K.C.Wong Education Foundation(No.GJTD-2018-04);the Strategic Priority Research Program of Chinese Academy of Science(No.XDA21060300). 摘　　要：It is very difficult to directly spin the lignocellulose without pretreatment.Ionic liquids(ILs)are promising solvent to dissolve lignocellulose to prepare cellulose fiber.However,the degree of cellulose polymerization(DP)is reduced when lignocellulose is dissolved in ILs,and the lignin removal rate is low.The elongation at break and tensile strength of the fibers obtained by spinning the lignocellulose dissolved in ILs are poor.In this paper,preparing cellulose fiber directly from lignocellulose based on dissolving corn stalk via[C4mim]Cl-L-arginine binary system is achieved.It shows that the removal rate of lignin can reach 92.35%and the purity of cellulose can reach 85.32%after corn stalk was dissolved at 150℃C for 11.5 h when the mass fraction of arginine is 2.5%.The elongation at break of fiber reached 10.12%and the tensile strength reached 420 MPa.It is mainly due to the fact that L-arginine not only inhibits the degradation of cellulose but also promotes the delignination.Without any pulping or pretreatment,preparing cellulose fibers via direct dissolution and extrusion may provide a simple and effective way to prepare many novel cellulose materials. 关 键 词：Cellulose fibers Ionic liquids Corn stalks DISSOLVING Directly spinning
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