The Effect of Natural Fibres Mercerization on Natural Fibres/Polypropylene Composites: A Study of Thermal Stability, Morphology and Infrared Spectrum

Elammaran, Jayamani and Sinin, Hamdan and Soon, Kok Heng and Md Rezaur, Rahman and Muhammad Khusairy, Bin Bakri and Akshay, Kakar (2014) The Effect of Natural Fibres Mercerization on Natural Fibres/Polypropylene Composites: A Study of Thermal Stability, Morphology and Infrared Spectrum. Australian Journal of Basic and Applied Sciences, 8 (15). pp. 332-340. ISSN 1991-8178

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Abstract

This research was carried out to evaluate how alkali treatment of selected natural fibres (kenaf, luffa, betel nut, banana and rice straw) influences thermal properties, morphological properties and infrared spectrum properties of the composites made from polypropylene reinforced with natural fibres. Composites were made by compression moulding technique using hydraulic hot press. Composites were characterized by thermo-gravimetric analysis (TGA) to establish their thermal stability. The infrared spectrum of both treated and untreated natural fibres/PP composites were studied using Fourier transforms infrared spectrometer (FTIR). Infrared spectroscopy is sensitive to the presence of chemical functional groups in the composites. A functional group is a structural fragment within a molecule. Scanning electron microscopy (SEM) was used to investigate the morphology of composites. Increase in the thermal stability and better fibre-matrix compatibility of the composites were noticed in the treated fibres. Thermal stability of all the reinforced natural fibres was found to be around 205oC. Decomposition of both cellulose and hemicellulose in the fibres took place at 310oC and above, whereas the degradation of reinforced fibre composites took place above 430oC. After the chemical treatment, the FTIR results showed the reduction of OH bonds for all natural fibre composites used in this study. Mercerization had successfully modified the structure of natural fibres and these modifications improved the thermal stability of the composites by promoting better fibre-matrix bonding.

Item Type: Article
Uncontrolled Keywords: Natural fibres, infrared spectroscopy, alkali treatment, thermal analysis, scanning electron microscope, research, Universiti Malaysia Sarawak, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Academic Faculties, Institutes and Centres > Faculty of Engineering
Depositing User: Karen Kornalius
Date Deposited: 20 Oct 2015 02:55
Last Modified: 20 Oct 2015 02:55
URI: http://ir.unimas.my/id/eprint/9195

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