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Improving the Interface Strength in Flax Fibre Poly(lactic) Acid Composites

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In this study, the influence of four particular treatments on the mechanical properties of composites made from flax fibres and poly(lactic) acid is investigated. Unidirectional composite sheets with a fibre volume fraction between 30% and 50% have been produced using the film stacking method and then cut into specimens for tensile and three-point bending tests according to ASTM standards (D638 and D790). Samples using different matrix materials and fibre modifications have been manufactured using glycerol triacetate, thermoplastic starch, -methacryloxypropyltrimethoxysilane (MS) and boiled flax yarn. For matrix modification, mass percentages of 3, 5 and 8% of glycerol triacetate or 5, 10 and 30% of thermoplastic starch were added to a commercially available grade (2002D) of poly(lactic) acid polymer. Chemical modification of flax fibres via silane treatment has been carried out using -MS. As a more eco-friendly method of fibre treatment, boiled flax is also used in an attempt to achieve improved mechanical properties. The property results are presented along with differential scanning calorimeter and scanning electron microscope analyses examining the interfacial properties of the composite material.
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Keywords: COMPRESSION MOULDING; FLAX FIBRES; POLY(LACTIC) ACID

Document Type: Research Article

Publication date: 01 June 2009

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  • The goal of the creation of a biobased economy is challenging to agriculture, forestry, academia, government and industry. The extractable resources of the Earth are finite, regardless of the quibble over when they will be depleted. The economic, political and social demands for biobased chemicals, materials and energy are expected to radically transform the materials industries, particularly the plastics industry as well as the biofuel industry. These changes will be based on the principles of sustainability, eco-efficiency, industrial ecology, and green chemistry and engineering. In keeping with the growth of knowledge in this field, there is a strong need for a forum to share original research related to biobased materials and bioenergy. The Journal of Biobased Materials and Bioenergy (JBMB) has been created as an international peer-reviewed periodical to fulfill the need for communication in these research areas. This journal will encompass related research activities in all fields of science, engineering and the life sciences.
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