Woven hemp fabric reinforced vinyl ester composite: effect of water absorption on the mechanical properties degradation

Misnon, Mohd Iqbal and Islam, Md Mainul and Epaarachchi, Jayantha Ananda and Wang, Hao and Lau, Kin-tak (2016) Woven hemp fabric reinforced vinyl ester composite: effect of water absorption on the mechanical properties degradation. International Journal of Advances in Science, Engineering and Technology, 4 (3). pp. 96-101. ISSN 2321-8991


Natural fibre composites are potentially used in manufacturing industries and for that purpose, their water absorption properties are essential to be analysed. In this study, untreated and fire retardant chemical (FR) treated woven hemp fabrics (WHF) were used to reinforce vinyl ester resin. Water absorption tests were utilised to study the behaviour of water penetration into the composites. The diffusion coefficient were measured using Fick’s law while degradations of their mechanical properties were measured after 0, 168, 840 and 2688 hours of water immersion. It was found that the maximum water uptakes, times to saturation point and diffusion coefficient for fabricated composites were ranging 3.27-3.43%, 552-1848 hours and 1.45E-06 - 4.71E-06 mm2/s respectively. In terms of mechanical properties, the presence of water reduced the tensile strength and modulus up to 24% and 39% respectively due to the penetration of water which weakened the adhesion between the fibres and resin. The greater decline in tensile modulus than tensile strength due to the plasticisation of water on the vinyl ester and hemp fibres. Similar reasons can be applicable to the flexural properties for both samples since they show quite similar behaviour with tensile properties.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 02 Mar 2017 00:16
Last Modified: 18 Dec 2017 06:34
Uncontrolled Keywords: woven hemp fabric, water absorption, tensile, flexural, diffusion coefficient.
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8604 Leather Products, Fibre Processing and Textiles > 860403 Natural Fibres, Yarns and Fabrics
URI: http://eprints.usq.edu.au/id/eprint/30311

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