Flexural properties of sisal fibre/epoxy Composites

Alqahtani, Rafi Ali (2014) Flexural properties of sisal fibre/epoxy Composites. [USQ Project]

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Abstract

Nowadays, using natural fibres is becoming a very promising reinforcement for polymeric composites for different applications in mechanical and civil engineering. From research and industrial point of views, there are demands to understanding the potential of using such fibres and their impact on the mechanical properties of the composites. Moreover, exploring the potential of different types of natural fibres is an aim to overcome environmental pollution and degradation issues. Based on the literature, there is still demand on the need to understand natural fibre with polymer matrix for different loading conditions. This motivates the current study on flexural behaviour of sisal fibres reinforced epoxy composites. The composites were fabricated using hand layup techniques considering treated and untreated sisal fibres. 6% of NaOH chemical treatment was used owing to improve the interfacial adhesion of the fibres with the matrix. Three point bending technique was used in this study. SEM (Scanning Electron Microscopy) has been used to study the morphology of the failure surface of the composite after flexural tests.
The result revealed that untreated fibres did not improve the composite’s flexural strength due to a poor interfacial adhesion of the fibre with the matrix, which is consistent with the morphology study, i.e. debonding, detachment, and fibre pull out were observed on the fractured surfaces. However, 6% NaOH treated sisal fibres significantly improved the composite’s flexural strength and modulus by about 76% and 162%, respectively compared to pure epoxy. Morphology study on flexural fracture surfaces of treated sisal fibre composite showed the bonding between epoxy matrix and treated sisal fibre has much improved with the aid of the 6% NaOH. Also, epoxy resin penetrated into core of the treated sisal fibres which in turn assisted to interlock the fibre in the bulk of the composites (high interfacial adhesion) resulting in the high performance of treated sisal fibre/epoxy composite’s flexural properties compared to the untreated fibres.


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering Science (Mechanical Engineering) project.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Supervisors: Yousif, Belal
Date Deposited: 01 Jul 2015 23:52
Last Modified: 18 Aug 2015 00:45
Uncontrolled Keywords: sisal fiber ; epoxy Composites ; Flexural Properties
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
URI: http://eprints.usq.edu.au/id/eprint/27306

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