Production of cellulose nanofibrils and films from elephant grass using deep eutectic solvents and a solid acid catalyst
文献类型： 外文期刊
作者： Wu, Xi-Que 1 ; Liu, Pan-Dao 2 ; Liu, Qun 1 ; Xu, Shu-Ying 1 ; Zhang, Yu-Cang 3 ; Xu, Wen-Rong 1 ; Liu, Guo-Dao 2 ;
作者机构： 1.Hainan Univ, Sch Sci, Sch Chem Engn & Technol,Key Lab Solid Waste Resou, Hainan Prov Key Lab Fine Chem,Minist Educ,Key Lab, Haikou 570228, Hainan, Peoples R China
2.Chinese Acad Trop Agr Sci, Inst Trop Crop Genet Resources, Haikou 571101, Hainan, Peoples R China
3.Jimei Univ, Coll Food & Biol Engn, Xiamen 361021, Peoples R China
期刊名称：RSC ADVANCES （ 影响因子：3.119； 五年影响因子：3.098 ）
ISSN：
年卷期： 2021 年 11 卷 23 期
页码：
收录情况： SCI
摘要： A new strategy was developed to produce cellulose nanofibrils (CNFs) and films from raw elephant grass using deep eutectic solvents and a recyclable spent coffee-derived solid acid (SC-SO3H) catalyst with assistance of ultrasonic disintegration and a suction filtration film forming method. The effects of a solid acid and reused solid acid were comprehensively studied by comparing with catalyst-free conditions and using sulfuric acid as the catalyst. The CNF fibers obtained from this novel SC-SO3H catalyst method showed the longest fiber length. The corresponding films achieved the strongest tensile strength of 79.8 MPa and the elongation at break of 13.6%, and best thermostability. In addition, the performance of CNFs and films prepared by the fourth recovered SC-SO3H-4 catalyst was close to that obtained with the first use. The SC-SO3H could be reused by a simple decantation method, meaning this novel method has the potential for green and sustainable preparation of CNFs and films.
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