数字农科院2.0

The influence of residual pectin composition and content on nanocellulose films from ramie fibers: Micro-nano structure and physical properties

文献类型： 外文期刊

作者： Liru Luo;Wang Yu;Yongjian Yi;Chen Xing;Liangbin Zeng;Yuanru Yang;Hongying Wang;Zhonghai Tang;Zhijian Tan

作者机构：

关键词： Cellulose nanofibrils;Nanocellulose films;Pectin

期刊名称： International Journal of Biological Macromolecules

ISSN： 0141-8130

年卷期： 2023 年 247 卷

页码：

收录情况： SCIE（2023版）

摘要： In this study, cellulose nanofibril (CNF) films from ramie fibers were prepared with different pectin compositions and contents, and the influence of residual pectin on the overall performances of CNF films was evaluated. There was no significant effect of the residual pectin composition on the properties of obtained CNF films. However, when the content of residual pectin was increased from 0.45 % to 9.16 %, the surface area and water absorption of CNF films were increased from 0.2223 to 0.3300 m2/g, and from 93.51 % to 122.42 %, respectively. Pectin covers the CNF surface and act as a physical barrier between the cellulose fibrils; thus the nanocellulose films with high pectin content will have a loose and porous structure, resulting in a high surface area and a high water absorption. Besides, with the residual pectin content decreasing from 9.16 % to 0.45 %, the UVA light transmittance and tensile strength of CNF films were increased from 30.6 % to 59.9 %, and from 37.67 to 100.26 MPa, respectively. After removal of amorphous pectins in CNFs, the low pectin containing CNFs are able to pack more compactly to form a strong and thin film. This paper provides guidance for the preparation of CNF films with different performance requirements.

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