Chemical and Enzymatic Fiber Modification to Enhance the Mechanical Properties of CMC Composite Films

Xiaobao Li; Zhengjie Tang; Zhenbing Sun; John Simonsen; Zhinan Luo; Xiaoping Li; Jeffery J. Morrell

doi:10.3390/polym14194127

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Chemical and Enzymatic Fiber Modification to Enhance the Mechanical Properties of CMC Composite Films

Journal article

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Chemical and Enzymatic Fiber Modification to Enhance the Mechanical Properties of CMC Composite Films

Xiaobao Li, Zhengjie Tang, Zhenbing Sun, John Simonsen, Zhinan Luo, Xiaoping Li and Jeffery J. Morrell

Polymers, Vol.14(19), pp.1-14

2022

DOI: https://doi.org/10.3390/polym14194127

PMCID: PMC9573683

PMID: 36236075

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Abstract

eucalyptus bark

Yunnan pine wood

bamboo culms

industrial hemp hurd

FTIR

XRD

mechanical properties

Carboxymethyl cellulose (CMC) is a cellulose derivative that can be obtained from wood, bamboo, rattan, straw, and other cellulosic materials. CMC can be used to produce biofilms for many purposes, but the properties of these resulting films make them unsuitable for some applications. The effects of three kinds of plant fiber addition on CMC film properties was investigated using CMC derived from eucalyptus bark cellulose. Tensile strength (TS) and elongation at break (EB) of CMC or sodium alginate or glycerol composite films were 26.2 MPa and 7.35%, respectively. Tensile strength of CMC composite films substantially increased, reaching an optimum at 0.50 g of fiber. The enhancement due to industrial hemp hurd fiber on CMC composite films was more obvious. Pretreatment with hydrogen peroxide (H2O2) and glacial acetic acid (CH3COOH) produced films with a TS of 35.9 MPa and an EB of 1.61%. TS values with pectinase pretreated fiber films was 41.3 MPa and EB was 1.76%. TS of films pretreated with pectinase and hemicellulase was 45.2 MPa and EB was 4.18%. Chemical and enzymatic treatment both improved fiber crystallinity, but film tensile strength was improved to a greater extent by enzymatic treatment. Surface roughness and pyrolysis residue of the film increased after fiber addition, but Fourier transform infrared spectroscopy (FTIR), opacity, and water vapor transmission coefficients were largely unchanged. Adding fiber improved tensile strength of CMC or sodium alginate or glycerol composite films and broadened the application range of CMC composite films without adversely affecting film performance.

Details

Title: Chemical and Enzymatic Fiber Modification to Enhance the Mechanical Properties of CMC Composite Films
Authors: Xiaobao Li (Author) - Southwest Forestry University
Zhengjie Tang (Author) - Southwest Forestry University
Zhenbing Sun (Author) - Southwest Forestry University
John Simonsen (Author) - Oregon State Univ, Dept Wood Sci & Engn, Corvallis, OR 97331 USA
Zhinan Luo (Author) - Southwest Forestry University
Xiaoping Li (Corresponding Author) - Southwest Forestry University
Jeffery J. Morrell (Corresponding Author) - University of the Sunshine Coast, Queensland, National Centre for Timber Durability and Design Life
Publication details: Polymers, Vol.14(19), pp.1-14
Publisher: MDPI AG
Date published: 2022
DOI: 10.3390/polym14194127
ISSN: 2073-4360
PMID: 36236075; PMC9573683
Copyright note: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Organisation Unit: University of the Sunshine Coast, Queensland; National Centre for Timber Durability and Design Life; Forest Research Institute
Language: English
Record Identifier: 99681396602621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Polymer Science