Facile Extraction of Cellulose Nanofibrils (Cnfs) from Wood Using Acidic Ionic Liquid-catalyzed Organosolv Pretreatment Followed by Ultrasonic Processing. Issue 13 (1st December 2022)

• Record Type: Journal Article
• Authors: Zhao, Xin; Cheng, Fangchao; Hu, Yingcheng; Cheng, Ruixiang
• Is Part Of: Journal of natural fibers. Volume 19:Issue 13(2022)
• Page Start: 5697
• Page End: 5708
• Publication Date: 2022-12-01
• Subjects: Cellulose nanofibril -- organosolv pretreatment -- acidic ionic liquid -- thermal stability -- delignification -- nanofilm; 纤维素纳米纤维 -- 有机溶剂预处理 -- 酸性离子液体 -- 热稳定性 -- 脱木素 -- 纳米薄膜; Textile research -- Periodicals; Textile research; Periodicals; 677.005
• DOI: 10.1080/15440478.2021.1889434
• Languages: English
• ISSNs: 1544-0478

Abstract

ABSTRACT: Cellulose nanofibrils (CNFs) were successfully extracted from wood flour via atwo-step process involving acidic ionic liquid-catalyzed organosolv pretreatment and ultrasonic disintegration. Acomprehensive study was performed on the yield, morphology, crystallinity, chemical structure, and thermal stability of CNFs, as well as the mechanical properties and transparency of nanofilms. The results showed that 87.06% of the total lignin and 93.78% of hemicellulose were fractionated from lignocellulose after solvothermal pretreatment using 1, 4-butylene glycol. The isolated CNF maintained the type Icrystal lattice of native cellulose. Overall, the CNFs obtained after ultrasonication displayed asimilar morphology and crystallinity, but they had ahigher yield (41.82%), better thermal stability, and film-forming properties than those produced by concentrated acid hydrolysis. Solvothermal treatment using 1, 4-butylene glycol alcohol/water followed by ultrasonication is an ideal alternative CNF production method with alow environmental impact.