数字农科院2.0

Light-colored cellulose nanofibrils produced from raw sisal fibers without costly bleaching

文献类型： 外文期刊

作者： Wang Yu;Yongjian Yi;Hongying Wang;Yuanru Yang;Liangbin Zeng;Zhijian Tan

作者机构：

关键词： Ball milling;Cellulose nanofibrils;Light color;Maleic acid;Sisal fibers

期刊名称： Industrial Crops and Products

ISSN： 0926-6690

年卷期： 2021 年 172.0 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Although nanocelluloses can be isolated from unbleached lignocellulosic fibers, the presence of residual lignin may result in nanocellulose products with dark colors, which limit their application in many fields. In this study, maleic acid pretreatment is utilized prior to the ball milling of raw sisal fibers to produce white or light-colored cellulose nanofibrils (CNFs). Pretreatment of the unbleached sisal fibers can facilitate the fibrillation of CNFs through the depolymerization of cellulose and the dissolution of non-cellulosic cell wall components and non-crystalline cellulose. After 2 h of maleic acid hydrolysis at 90 °C, the obtained light-colored CNFs shows a glucan content of 91.03 % and an average width of 12.35 nm. Self-standing films produced from the CNFs exhibit a high tensile strength of 92.73 MPa and an elastic modulus of 3.13 GPa. This study presents an innovative approach for using raw lignocellulosic fibers to produce light-colored CNFs without requiring a costly bleaching process.

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