Production of cellulose nanofibrils and films from elephant grass using deep eutectic solvents and a solid acid catalyst. Issue 23 (13th April 2021)

• Record Type: Journal Article
• Authors: Wu, Xi-Que; Liu, Pan-Dao; Liu, Qun; Xu, Shu-Ying; Zhang, Yu-Cang; Xu, Wen-Rong; Liu, Guo-Dao
• Is Part Of: RSC advances. Volume 11:Issue 23(2021)
• Page Start: 14071
• Page End: 14078
• Publication Date: 2021-04-13
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra02259h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A new strategy was developed to produce cellulose nanofibrils and films from elephant grass using deep eutectic solvents and a recyclable solid acid catalyst with assistance of ultrasonic disintegration and a suction filtration film forming method. Abstract : 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-SO3 H) 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-SO3 H 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-SO3 H-4 catalyst was close to that obtained with the first use. The SC-SO3 H could be reused by a simple decantation method, meaning this novel method has the potential for green and sustainable preparation of CNFs and films.