This study was undertaken to investigate corn gluten meal (CGM) as a biodegradable matrix material for wood fibre reinforced composites.
CGM was used alone, as well as hybridized with polypropylene, and reinforced with radiata pine (Pinus Radiata) fibre using a twin-screw extruder
followed by injection moulding. Tensile testing, scanning electron microscopy and differential scanning calorimetry were carried out to assess
the composites. For composites from CGM and wood fibres, extrusion was carried out with the aid of the following plasticizers: octanoic acid,
glycerol, polyethylene glycol and water. Windows of processability for the different plasticizers were obtained for all plasticizers. These were found
to lie between 20 and 50 wt.% of plasticizer with a maximum of approximately 20% wood fibre reinforcement. The best mechanical properties
were obtained with a matrix containing 10 wt.% octanoic acid and 30 wt.% water, which gave a tensile strength and Young’s modulus of 18.7 MPa
and 4 GPa, respectively. Hybrid matrix composites were compounded with a maleated polypropylene coupling agent and benzoyl peroxide as a
cross-linking agent. The highest tensile strength and Young’s modulus obtained from hybrid matrix composites were 36.9 MPa and 5.8 GPa with
50 wt.% fibre.
This study was undertaken to investigate corn gluten meal (CGM) as a biodegradable matrix material for wood fibre reinforced composites.CGM was used alone, as well as hybridized with polypropylene, and reinforced with radiata pine (Pinus Radiata) fibre using a twin-screw extruderfollowed by injection moulding. Tensile testing, scanning electron microscopy and differential scanning calorimetry were carried out to assessthe composites. For composites from CGM and wood fibres, extrusion was carried out with the aid of the following plasticizers: octanoic acid,glycerol, polyethylene glycol and water. Windows of processability for the different plasticizers were obtained for all plasticizers. These were foundto lie between 20 and 50 wt.% of plasticizer with a maximum of approximately 20% wood fibre reinforcement. The best mechanical propertieswere obtained with a matrix containing 10 wt.% octanoic acid and 30 wt.% water, which gave a tensile strength and Young’s modulus of 18.7 MPaand 4 GPa, respectively. Hybrid matrix composites were compounded with a maleated polypropylene coupling agent and benzoyl peroxide as across-linking agent. The highest tensile strength and Young’s modulus obtained from hybrid matrix composites were 36.9 MPa and 5.8 GPa with50 wt.% fibre.
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