Nanofibrillated Cellulose Extracted by Enzymatic Hydrolysis Followed by Mechanical Fibrillation. Issue 14 (28th October 2022)

• Record Type: Journal Article
• Authors: Ribes, Débora Duarte; Acosta, Andrey Pereira; Gatto, Darci Alberto; Piva, Evandro; De Avila Delucis, Rafael; Beltrame, Rafael
• Is Part Of: Journal of natural fibers. Volume 19:Issue 14(2022)
• Page Start: 9363
• Page End: 9372
• Publication Date: 2022-10-28
• Subjects: Nanocellulose -- biological pretreatment -- cellulase -- eucalyptus; 纳米纤维素 -- 生物预处理 -- 纤维素酶 -- 桉树; Textile research -- Periodicals; Textile research; Periodicals; 677.005
• DOI: 10.1080/15440478.2021.1982826
• Languages: English
• ISSNs: 1544-0478

Abstract

ABSTRACT: In a comparison with certain one-step processes, enzymatic hydrolysis followed by mechanical defibrillation may avoid the use of nonrenewable resources, mitigate the generation of toxic effluents, and reduce the energy consumption related to a single mechanical process. In the present study, bleached and unbleached hardwood pulps were employed as raw materials for producing nanofibrillated cellulose (CNF) using a two-step process, in which a cellulase enzyme was inoculated to act as a pretreatment for a subsequent grinding process. The obtained CNF reached high crystallinity indexes (above 70%) and high thermal stability (degradation onset temperatures around 200°C). Increases in enzyme concentration yielded decreases in diameter and increases in both thermal stability and crystallinity index. These findings indicated that the enzymatic hydrolysis used as a pretreatment to a further grinding process can allow the production of valuable CNF-based products.