Effects of alkali treatment and elevated temperature on the mechanical properties of bamboo fibre-polyester composites

Manalo, Allan C. and Wani, Evans and Zulkarnain, Noor Azwa and Karunasena, Warna and Lau, Kin-tak (2015) Effects of alkali treatment and elevated temperature on the mechanical properties of bamboo fibre-polyester composites. Composites Part B: Engineering, 80 (1). pp. 73-83. ISSN 1359-8368

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Abstract

Bamboo fibre reinforced composites are not fully utilised due to the limited understanding on their mechanical characteristics. In this paper, the effects of alkali treatment and elevated temperature on the mechanical properties of bamboo fibre reinforced polyester composites were investigated. Laminates were fabricated using untreated and sodium hydroxide (NaOH) treated (4 to 8% by weight) randomly oriented bamboo fibres and tested at room and elevated temperature (40, 80 and 120oC). An improvement in the mechanical properties of the composites was achieved with treatment of the bamboo fibres. An NaOH concentration of 6% was found optimum and resulted in the best mechanical properties. The bending, tensile and compressive strength of this composite is 44.2, 21.0, 111.2 MPa, respectively while the stiffness is 4.0 GPa which are 7, 10, 81, and 25%, respectively higher than the untreated composites. When tested up to 80oC, the flexural and tensile strength are slightly enhanced but the bending stiffness and compressive strength decreased as these latter properties are governed by the behaviour of resin. At 40 and 80oC, the bond between the untreated fibres and polyester is comparable to that of untreated composites and resulted in almost same mechanical properties. However, a significant decrease in all mechanical properties was observed for composites tested at 120oC.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Submitted version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 19 Feb 2016 04:32
Last Modified: 13 Sep 2016 04:27
Uncontrolled Keywords: bamboo; polyester; bio-composites; alkali treatment; elevated temperature; mechanical properties
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870303 Polymeric Materials (e.g. Paints)
Identification Number or DOI: 10.1016/j.compositesb.2015.05.033
URI: http://eprints.usq.edu.au/id/eprint/27928

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