Gamon, Guillaume and Evon, Philippe and Longieras, Antoine and Rigal, Luc Incorporation of natural fibres in a biodegradable thermoplastic polymer via a twin-screw extruder. (2011) In: 5th International Wood Fibre Polymer Composites Symposium, 26 September 2011 - 27 September 2011 (Biarritz, France). (Unpublished)
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Abstract
Incorporation of a widely available agricultural by-product, wheat bran, into polylactic acid (PLA) have been investigated and compared to miscanthus and highly cellulosic fibres. They were compounded at different ratio from 10 to 40% wt. Influence on energy consumption during the process showed that the more filler added, the more energy needed but wheat-bran based composites consume less energy to be processed than the other fibres (131 W.h/kg for SME instead of 144 W.h/kg for miscanthus fibres in the case of the 40% wt fibre-filled PLA compounds). Viscosity behaviour was evaluated, highlighting a thinning effect of the wheat bran when compounded to PLA. Comparison of mechanical properties raised some negative effects on composite strength (-59% for tensile strength for the PLA-40% wheat bran compound) and stiffening was not as important as comparative fibres (4290 MPa for tensile modulus instead of 8790 MPa for miscanthus fibres in the case of the 40% wt fibre-filled PLA compounds). Complex chemical composition of the bran with lower fibre content can explain this. However, wheat bran is a promising filler to produce cheap sustainable composites.
Item Type: | Conference or Workshop Item (Paper) |
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Audience (conference): | International conference without published proceedings |
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Institution: | Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE) Other partners > VEGEPLAST (FRANCE) |
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Deposited On: | 06 Jan 2014 12:38 |
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