Natural fibre-reinforced composite parts for automotive applications

Furtado, Samuel; Araújo, Aurélio L.; Silva, Arlindo; Alves, Camila Xavier; Ribeiro, A. M. R.

doi:10.1504/ijautoc.2014.064112

Cited by 39 publications

(33 citation statements)

References 30 publications

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“…Extensive research and a number of publications on the terms cellulose and biocomposites have increased drastically in recent years [3]. Many cellulose reinforced composites have potential applications in the automotive component industry, construction and packaging [4][5][6]. This is due to the sustainability, availability, low density, high specific strength and stiffness of natural fibers which can be compared to that of glass fibers [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…This is due to the sustainability, availability, low density, high specific strength and stiffness of natural fibers which can be compared to that of glass fibers [7][8][9]. To date, almost 50% of a vehicle's internal parts are made out of polymeric materials and the global average weight of plastic in a modern day passenger vehicle is 105 kg accounting for 10-12% of the vehicle weight [4]. As government regulations and automotive makers are trending towards fuel economy, high efficiency, and cleaner ways of operating with reduced CO 2 levels, the demand for biocomposites is expected to increase [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Fiber Orientation on the Mechanical Properties of PA6/Cellulose Composite

Sridhara

Vilaseca

2020

Applied Sciences

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Cellulose is being considered as a suitable renewable reinforcement for materials production. In particular, cellulose based composites are attracting global interest for their unique and intrinsic properties such as strength to weight ratio, dimensional stability and low thermal expansion and contraction. This article investigates the preparation of cellulose pulp fibers with polyamide-6 (PA6) polymer and the effect of fiber orientation within the matrix on the final properties of the biocomposite. Cellulose pulp fibers were melt compounded with PA6 using a thermo-kinetic mixer. Different formulations were prepared and the compounds were manufactured into test samples by injection molding. Mechanical characterization revealed that elastic modulus and the flexural properties increased linearly with the fiber composition. The effect of fiber orientation was examined from square samples out of which individual specimens were cut at different directions with respect to the flow direction. The contributions related to fiber content and effect of fiber orientation on the tensile properties assessed lent positively towards parallel oriented samples (0°) with respect to flow direction. Furthermore, the cellulose network within the biocomposite revealed the superior interfacial properties between the cellulose and PA6 matrix when observed under a scanning electron microscope.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of Fiber Orientation on the Mechanical Properties of PA6/Cellulose Composite

Sridhara

Vilaseca

2020

Applied Sciences

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“…Due to the high cellulose content, flax is among the strongest and stiffest natural fibres. Cellulose is a semi-crystalline polysaccharide with a large amount of hydroxyl groups that reflects hydrophilic nature and incompatibility with hydrophobic polymer matrix, resulting in poor adhesion [6][7][8][9]. Hence, chemical or physical modification is required to enhance the fibre-matrix adhesion for both thermoplastic and thermoset compounds.…”

Section: Introductionmentioning

confidence: 99%

Non-woven flax fibre reinforced acrylic based polyester composites: The effect of sodium silicate on mechanical, flammability and acoustic properties

Rasyid¹,

Salim²,

Akil³

et al. 2019

Express Polym. Lett.

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Non-woven flax fibre reinforced acrylic-based polyester (NFA) composites were prepared using an impregnation process. A mixture of acrylic-based polyester (Acrodur ®) with varying sodium silicate (SS) loadings was applied to impregnate the non-woven flax fibre mat. Flexural tests were performed to evaluate the mechanical properties of the composites. Flammability properties were assessed via UL94 test and limiting oxygen index (LOI). The mechanical properties of NFA composites decreased substantially with increment in SS loading. The addition of SS resulted in significant improvement of flame retardancy, whereby UL94 rating enhanced from V-1 to V-0, while the LOI values increased from 24 to 40. Sound absorption coefficients of the NFA composites were measured via two-microphone transfer function technique in impedance tube. The sound absorption properties of NFA composites also improved with the incorporation of SS, whereby the sound absorption coefficient increased up to 0.87 at 2000 Hz frequency. Based on the overall evaluation, 20 wt% of SS effectively increased flame retardancy and sound absorption properties, along with moderate deterioration in flexural properties. The scanning electron microscopic (SEM) analysis of the composites surfaces displayed formation of voids and irregular structures at higher SS loading, which reduced the mechanical properties of NFA composites. The SEM images offered supportive evidences on the role of hollow lumen structures in natural fibres to ensure better sound absorption performance in NFA composites.

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“…The fibre length is controlled by the numbers of cutters on the rolling cartridge. Discontinuous natural fibers such as hemp and flax have the potential to serve as the reinforcement in spray layup applications [ 1 , 10 ] but only if a method of feeding discontinuous fibres in a reliable way can be found.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Design and Experimental Investigation of a Novel Pneumatic Conveying Method to Disperse Natural Fibers in Thermoset Polymers

2016

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Natural fibers can be attractive reinforcing materials in thermosetting polymers due to their low density and high specific mechanical properties. Although the research effort in this area has grown substantially over the last 20 years, manufacturing technologies to make use of short natural fibers in high volume fraction composites; are still limited. Natural fibers, after retting and preprocessing, are discontinuous and easily form entangled bundles. Dispersion and mixing these short fibers with resin to manufacture high quality, high volume fraction composites presents a significant challenge. In this paper, a novel pneumatic design for dispersion of natural fibers in their original discontinuous form is described. In this design, compressed air is used to create vacuum to feed and convey fibres while breaking down fibre clumps and dispersing them in an aerosolized resin stream. Model composite materials, made using proof-of-concept prototype equipment, were imaged with both optical and X-ray tomography to evaluate fibre and resin dispersion. The images indicated that the system was capable of providing an intimate mixture of resin and detangled fibres for two different resin viscosities. The new pneumatic process could serve as the basis of a system to produce well-dispersed high-volume fraction composites containing discontinuous natural fibres drawn directly from a loosely packed source.

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Natural fibre-reinforced composite parts for automotive applications

Cited by 39 publications

References 30 publications

Assessment of Fiber Orientation on the Mechanical Properties of PA6/Cellulose Composite

Assessment of Fiber Orientation on the Mechanical Properties of PA6/Cellulose Composite

Non-woven flax fibre reinforced acrylic based polyester composites: The effect of sodium silicate on mechanical, flammability and acoustic properties

Preliminary Design and Experimental Investigation of a Novel Pneumatic Conveying Method to Disperse Natural Fibers in Thermoset Polymers

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