Impact Property of Flexible Epoxy Treated Natural Fiber Reinforced PLA Composites

Nuthong, Wiphawee; Uawongsuwan, Putinun; Pivsa‐Art, Weraporn; Hamada, Hiroyuki

doi:10.1016/j.egypro.2013.06.820

Cited by 72 publications

(31 citation statements)

References 10 publications

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“…Due to the fact that PLA is classified as brittle at room temperature, it is extremely important to increase its impact strength. It is known that low impact strength is a result of weak interfacial adhesion between fibre and matrix, which causes debonding, pull-out, fracture of the fibre and strain resistance [29,30]. The addition of lignocellulose fibres has been found to cause a decrease in impact strength, and the negative effect of natural fillers has also been described in the literature [27,28].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

The Influence of Wood and Basalt Fibres on Mechanical, Thermal and Hydrothermal Properties of PLA Composites

2020

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In this study, biodegradable biocomposites based on polylactide with basalt fibres (BFs) or wood fibres (WFs) of 7.5 or 15 wt% were prepared by injection moulding. Various tests, including tensile test, bending test and impact test, were carried out to investigate the mechanical properties of the composites. Additionally, the samples were tested at different temperatures. Depending on the type of fibre, differences were noted in their mechanical properties; the addition of WF caused a decrease in strength and the higher the fibre content, the higher the decrease was noted from 18% up 25% in the case of tensile strength. However, the Young modulus was improved by 45% for composites with 15 wt% of WF. The addition of BF improved all the properties, especially Young modulus was improved by over 45%. Despite the low strength observed in neat polylactide at high temperatures-394 MPa, the addition of WF or BF improved the flexural strength more than twofold up to 1684 MPa (PLA/15BF). Moreover, the addition of natural fibres caused an increase in dimensional stability as shown by the decrease of the coefficient of thermal expansion which dropped over 50% for composites with 15 wt% of BF, which significantly expands the areas of use of materials. After 4 weeks of biodegradation, only a slight decrease approximately 5% was observed in the mechanical properties together with an increase in crystallinity. Overall, the results confirm that the prepared composites can be successfully used in engineering applications with long-term operation.

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Section: Mechanical Propertiesmentioning

confidence: 99%

The Influence of Wood and Basalt Fibres on Mechanical, Thermal and Hydrothermal Properties of PLA Composites

2020

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“…Desta forma, diversas pesquisas estão sendo realizadas [13][14] com o intuito de melhorar as propriedades físicas, mecânicas e térmicas de matrizes poliméricas biodegradáveis com a incorporação de fibras naturais de origem vegetal, uma vez que a variedade de plantas disponíveis na biodiversidade do nosso planeta, além de ser um recurso renovável e são menos abrasivas que as fibras artificiais usualmente utilizadas como reforços, como a fibra de vidro e de carbono [15][16].…”

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Influência de fatores ambientais nas propriedades mecânicas de biocompósitos de pla reforçado com fibra de coco e borra de café

Santos

Passador

Montagna³

2020

Tecno-log.

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________________________________________________________________________________________________________ RESUMOO desenvolvimento de biocompósitos poliméricos tem despertado tanto o interesse científico quanto industrial em desenvolver produtos ecologicamente corretos para diversas aplicações. Desta forma, este trabalho de pesquisa teve o intuito de desenvolver e caracterizar compósitos biodegradáveis de poli (ácido lático) (PLA), reforçado com diferentes porcentagens (5% e 15% m/m) de fibra de coco (FC) e borra de café (BC), sem tratamento superficial. Tanto a FC quanto a BC são popularmente tratadas como resíduos sólidos e apresentam grande potencial para serem utilizados como cargas naturais agindo como reforço e também como aceleradores da biodegradação em matrizes poliméricas para a obtenção de um material biodegradável. Os compósitos foram processados em um homogeneizador DRAIS seguido de prensagem a quente. As amostras foram caracterizadas pela análise visual (imagens macroscópicas) e medidas de ângulo de contato (goniômetro), bem como foram submetidas aos testes de absorção de água e envelhecimento em estufa, seguido do ensaio de resistência ao impacto Izod. Após, verificou-se absorção de água, perda de massa, análise visual, resistência mecânica ao impacto Izod e a caracterização morfológica por microscopia eletrônica de varredura (MEV) da superfície de fratura das amostras após ensaio mecânico. A partir dos resultados obtidos verificou-se a boa adesão entre as cargas naturais e a matriz de PLA, resultando em valores de resistência ao impacto próximo ao do PLA puro, porém os fatores ambientais influenciaram diretamente nessas propriedades mecânicas, tendo a umidade interferida na redução e no envelhecimento do leve acréscimo dos valores de resistência ao impacto.

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“…This has given an impetus to the research in the field of polymer composites and researchers are faced with the challenge of bringing out better composite materials. As a result, various natural fibers have been explored for reinforcing polymer matrices . The advantages of using natural fibers for reinforcement of polymers are easy availability, renewability, biodegradability, low density, high specific strength, noncorrosive nature, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of murta bast fiber reinforced epoxy composites

Barbhuiya

Choudhury²,

Ismail

2016

J of Applied Polymer Sci

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The growing global concern over environment protection has led to the application of natural fiber reinforced polymer composites as alternative materials in manufacturing sectors. Various natural fibers are therefore being explored for reinforcement of polymer matrices. In the present work, murta bast fibers of varying length and weight percent are mixed randomly with the epoxy matrix and the composites are prepared from these mixtures by using the hand lay-up method. The composites are characterized on the basis of density, thermal gravimetric analysis, infrared spectroscopy, scanning electron microscopy, tensile strength, flexural strength, compressive strength, impact strength, and Rockwell hardness studies. Tensile, flexural, and compressive moduli of the composites are also determined. The tensile strength of the composite was analyzed in the light of the different analytical models. Composites containing 30 weight % fibers of length 25 or 35 mm have the optimum mechanical properties. Murta bast fiber has the characteristics to become a good natural material for reinforcement.

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Impact Property of Flexible Epoxy Treated Natural Fiber Reinforced PLA Composites

Cited by 72 publications

References 10 publications

The Influence of Wood and Basalt Fibres on Mechanical, Thermal and Hydrothermal Properties of PLA Composites

The Influence of Wood and Basalt Fibres on Mechanical, Thermal and Hydrothermal Properties of PLA Composites

Influência de fatores ambientais nas propriedades mecânicas de biocompósitos de pla reforçado com fibra de coco e borra de café

Characteristics of murta bast fiber reinforced epoxy composites

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