Effect of hemp fibre surface treatment on the fibre-matrix interface and the influence of cellulose, hemicellulose and lignin contents on composite strength properties

Kabir, Mohammad Mazedul and Alhaik, Mohammad Yousef and Aldajah, Saud Hamad and Lau, Kin Tak and Wang, Hao and Islam, Md Mainul (2021) Effect of hemp fibre surface treatment on the fibre-matrix interface and the influence of cellulose, hemicellulose and lignin contents on composite strength properties. Advances in Materials Science and Engineering, 2021:9753779. pp. 1-17. ISSN 1687-8434

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Natural fibres have recently become an attractive alternative to synthetic fibres in the implementation of polymer composite structures. Inherent flaws within natural fibres in terms of their constituent contents (hemicellulose, cellulose, and lignin) reduce the compatibility of these fibres with polymer matrices. In this study, the effects of chemical treatments on hemp fibres and the resulted polyester matrix composite are investigated. The fibres were treated with alkali (0-10% NaOH), acetyl, and silane chemicals. Long unidirectional fibre composites were prepared by vacuum-assisted resin transfer moulding (VARTM) process. Thermal properties of the fibres were tested using differential scanning calorimetry (DSC) analyses. The mechanical properties of the composite samples were tested using compression and bending tests. Failure analysis of tested composites was undertaken through Optical Microscope (OM) and Scanning Electron Microscope (SEM). The results showed that the treatments of the 4% NaOH reduced interfacial bonding strength and decreased composite properties compared to untreated samples. At higher concentrations (6-10% NaOH), the mechanical properties of the composites increased as a result of greater interfacial bonding. Different trends were observed in the case of alkalised fibres that were further treated with acetyl and silane treatments. It was observed that the treated fibres effectively improved the bonding properties of composites and was in agreement with the micrographs.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 18 Jan 2022 02:03
Last Modified: 19 Jan 2022 02:40
Uncontrolled Keywords: Cellulose content; Chemical treatments; Composite strength; Effect of chemicals; Fiber surface treatments; Fiber/matrix interface; Lignin contents; Polyester matrix composites; Polymer matrices; Strength property
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2008): B Economic Development > 86 Manufacturing > 8604 Leather Products, Fibre Processing and Textiles > 860403 Natural Fibres, Yarns and Fabrics
Socio-Economic Objectives (2020): 24 MANUFACTURING > 2411 Leather products, fibre processing and textiles > 241103 Natural fibres, yarns and fabrics
Identification Number or DOI: https://doi.org/10.1155/2021/9753779
URI: http://eprints.usq.edu.au/id/eprint/45516

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