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

第一作者： Wu, Xi-Que

作者： Wu, Xi-Que;Liu, Qun;Xu, Shu-Ying;Xu, Wen-Rong;Liu, Pan-Dao;Liu, Guo-Dao;Zhang, Yu-Cang

作者机构：

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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