Fabrication process optimization of hemp fibre-reinforced polypropylene composites

Yan, Z. L. and Zhang, J. C. and Lin, G. and Zhang, H. and Ding, Y. and Wang, H. (2013) Fabrication process optimization of hemp fibre-reinforced polypropylene composites. Journal of Reinforced Plastics and Composites, 32 (20). pp. 1504-1512. ISSN 0731-6844

Abstract

Natural fibre-reinforced composites have attracted great research and economic interests because of their outstanding
'green' characteristics compared with glass fibre-reinforced composites. It is very important to understand the processing effect on the natural fibre-reinforced composites mechanical properties because of the natural fibre degradation characteristics. Optimizing the fabrication process, especially the compounding process, is effective to achieve the optimal properties of the composites. In this research a natural fibre, noil hemp fibre, was applied to reinforce polypropylene with internal mixing process. The influence of compounding parameters, such as mixing temperature, mixing time and rotor speed, on the mechanical properties (tensile strength, flexural strength and impact strength) of the noil hemp fibre/polypropylene composites was investigated using orthogonal method and the evidence of thermogravimetric
analysis test of fibre and the observation of fibre dispersion in resin. The range analysis and variance of analysis demonstrated that the mixing temperature has significant effect on the three mechanical properties, mixing time has minor influence on the tensile and flexural strengths, and rotor speed mainly affects the impact strength. The thermogravimetric analysis test of noil hemp fibre and the fibre dispersion in resin show that a combination of low mixing temperature, short mixing time and high rotor speed of compounding process is helpful to achieve certain fibre dispersion without serious thermal degradation of fibre. Noil hemp fibre/polypropylene composites with the best comprehensive mechanical properties could be obtained at 165 degree C for 12 min with rotor speed 50 r/min.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © The Author(s) 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav. Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 19 Nov 2013 22:35
Last Modified: 11 Aug 2014 02:05
Uncontrolled Keywords: hemp fibre; natural fibre composites; internal mixing process; mechanical properties; orthogonal design
Fields of Research : 09 Engineering > 0910 Manufacturing Engineering > 091006 Manufacturing Processes and Technologies (excl. Textiles)
03 Chemical Sciences > 0305 Organic Chemistry > 030502 Natural Products Chemistry
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1177/0731684413501925
URI: http://eprints.usq.edu.au/id/eprint/24279

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