Could biopolymers reinforced by randomly scattered flax fibre be used in structural applications? |
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| Affiliation: | 1. School of Engineering, University of Borås, SE-501 90 Borås, Sweden;2. Department of Materials Science, Tampere University of Technology, P.O. Box 589, FI-33101 Tampere, Finland;1. Mechanics Department, National Technical University of Athens, IroonPolytechniou 9, Zografou, 15780 Athens, Greece;2. National Centre of Scientific Research “Demokritos”, Patr. Gregoriou E & 27 NeapoleosStr, AgiaParaskevi, 15341 Athens, Greece;1. Centre of Automotive Technology, Cranfield University, Cranfield, UK;2. Institute for Innovation, Design and Sustainability, School of Engineering, Robert Gordon University, Aberdeen AB10 7GJ, UK;1. Mechanics Department, National Technical University of Athens, Iroon Polytechniou 9, Zografou, 15780, Athens, Greece;2. Physics Department, National Technical University of Athens, Iroon Polytechniou 9, Zografou, 15780, Athens, Greece |
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| Abstract: | Thermoplastics reinforced by natural fibres are mainly used for fitting-up products in the automotive industry. The aim of this work is to study the tensile properties of natural fibre-biopolymer composites in order to determine whether or not, biocomposites may replace glass fibre reinforced unsaturated polyester resins. The materials used are flax fibre, polylactic acid (PLA), l-polylactide acid (PLLA), poly(3-hydroxylbutyrate) (PHB), polycaprolactone and starch thermoplastic (MaterBi® Z), poly(butylene succianate) (PBS) and poly(butylene adipate-co-terephtalate) (PBAT). The tensile properties of the flax fibres have already been determined C. Baley, Analysis of the flax fibres tensile behaviour and analysis of the tensile stiffness increase, Comp Part A 2002;33:939–948]. The composites are manufactured using a film stacking technique. After studying the processing parameters, these are then adapted to each thermoplastic composites. Test samples are cut out from the composites to test their mechanical properties under tensile loading conditions. These tensile properties are then compared to those of similar polypropylene flax composites. Preliminary results show that the tensile properties are improved with the fibre volume fraction. The tensile strength and Young’s modulus of PLLA and PLA flax composites are greater than those of similar PP/flax fibre composites. The specific tensile strength and modulus of flax fibre/PLLA composite have proved to be very close to those of glass fibre polyester composites. |
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