Mechanical properties and biodegradability of green composites based on biodegradable polyesters and lyocell fabric

Shibata, Mitsuhiro; Oyamada, Shingo; Kobayashi, Shinichi; Yaginuma, Daisuke

doi:10.1002/app.20405

Cited by 138 publications

(75 citation statements)

References 15 publications

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“…The study observed that unidirectional biodegradable composites fabricated using an emulsion-type PLA resin and kenaf fibres at a fibre content of 70 wt.% had high tensile and flexural strengths of 223 MPa and 254 MPa respectively. Shibata et al [16] study prepared composites with PLA/lyocell fabric by compression moulding. The tensile modulus and strength of lyocell/PLA composites improved with increasing fibre content.…”

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical performance of poly(lactic acid)/flax fibre-reinforced biocomposites

Nassiopoulos

Njuguna

2015

Materials & Design

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In this study, the thermo-mechanical performance of flax fibre reinforced poly lactic acid (PLA) biocomposites was investigated for the potential use in load bearing application such as body-in-white and body structures in the automotive sector. Focus was given into the relationships between the thermal and mechanical properties, and the material response under different loading and environmental conditions. The strength (72 MPa) and stiffness (13GPa) of flax/PLA composites investigated indicate a very promising material to replace traditional choices in load bearing application. The PLA's crystallinity was measured to approximately 27%. Annealing above 100 °C for an hour decreased that value to 30%, but analysis of tensile results of annealed specimens reveals a significant reduction of both the tensile strength and modulus. This reduction is associated with micro-cracking that occurred on the surface of PLA during the heating as well as deterioration of the flax properties due to drying. The study results show that strength and modulus increased with increasing strain rates, while elongation at break reduces respectively. A modulus of 22 GPa was recorded in 4.2 m/sec crosshead velocity. Further, flax/PLA showed significantly higher modulus than flax/epoxy for the composites studied. Improvement of the interfacial bonding and the temperature characteristics, combined the thermoplastic nature of PLA, demonstrates that flax/PLA composites is ideal for use in structural automotive applications.

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Section: Introductionmentioning

confidence: 99%

Thermo-mechanical performance of poly(lactic acid)/flax fibre-reinforced biocomposites

Nassiopoulos

Njuguna

2015

Materials & Design

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“…Compósitos verdes constituídos de fibras de celulose e poliésteres biodegradáveis (poli(hidroxibutirato-co-valerato), poli(succinato de butileno) e poli(ácido lático)) foram preparados e caracterizados por Shibata e colaboradores 182 . Os módulos de tensão e a resistência mecânica de todos os compósitos preparados são maiores do que os dos polímeros puros.…”

Section: Biocompósitos: Fibras Lignocelulósicas E Polímeros Biodegradunclassified

Aplicações de fibras lignocelulósicas na química de polímeros e em compósitos

2009

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Recebido em 19/1/09; aceito em 25/3/09; publicado na web em 2/4/09 APPLICATIONS OF LIGNOCELLULOSIC FIBERS IN POLYMER CHEMISTRY AND IN COMPOSITES. The use of lignocellulosic fibers and their constituents, as raw materials in the production of polymeric and composite materials, represent an exceptional opportunity of sustainable technological development. In the present report works that discuss promising alternatives of obtaining and use of materials such as cellulose, hemicellulose, lignin, cellulose nanocrystals and biocomposites were revised. The advance in the use of biomass can be, in a near future, capable of going beyond the application difficulties of these vast materials, especially in relation to the economical unviability, by the production of high performance polymeric and composite materials. This advance would represent a higher profitability to some areas of agrobusiness, especially the sector of biofuels, which produces elevated amounts of biomass waste.Keywords: lignocellulosic fibers; nanowhiskers; biocomposites. introduçÃoNos últimos anos tem surgido um grande interesse mundial no desenvolvimento de tecnologias "verdes" que possibilitem a utilização de produtos de menor impacto ambiental.1-4 A química "verde", como um todo, implica no desenvolvimento de processos químicos e produtos que levem a um ambiente mais limpo, saudável e sustentável. Neste contexto, os materiais plásticos sintéticos têm recebido especial atenção por conter em seus métodos de preparação questões que devem ser priorizadas. As questões que devem ser priorizadas são a não-biodegradabilidade dos plásticos sintéticos e por serem oriundos de fontes não-renováveis. 5-8Na busca pela sustentabilidade, várias pesquisas e trabalhos na área de materiais poliméricos e compósitos foram, e estão sendo, realizados para garantir a preservação ambiental e proporcionar um melhor padrão de vida à sociedade.9-13 Dentre as pesquisas nesta área, as que buscam a aplicação de recursos naturais na preparação dos materiais vêm crescendo, podendo-se destacar o uso de fibras naturais. [14][15][16][17][18][19][20][21][22] A Organização das Nações Unidas para a Agricultura e a Alimentação (FAO-ONU -Food and Agriculture Organization of the United Nations) declarou o ano de 2009 como o ano internacional das fibras naturais.23 A medida visa conscientizar e estimular a utilização de fibras naturais, encorajando políticas governamentais de incentivo ao setor e às ações empresariais sustentáveis, para a exploração dessas matérias-primas.Destaque ainda maior deve ser dado à utilização de fibras naturais de origem vegetal, em razão da enorme variedade de espécies passí-veis de serem pesquisadas. Diversas fibras vegetais são produzidas em praticamente todos os países e usualmente são designadas como materiais lignocelulósicos. Algumas fibras ocorrem espontaneamente na natureza, outras são cultivadas como atividade agrícola e ainda há aquelas que são resíduos gerados, principalmente, pela agroindústria. Na Tabela 1 pode ser verificada a produção anual das princ...

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“…In recent years, the utilization of plant fibers to reinforce polymers has drawn the attention of various researchers (Shibata et al 2004;Lee and Wang 2006;Li et al 2007;Ku et al 2011;Faruk et al 2014). Plant fibers, such as wood fibers, bamboo fibers, and jute, not only have great specific strength and a wide range of sources, but also are inexpensive, renewable, and biodegradable.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Wood Flour Reinforced Lignin-Epoxy Resin Composite

Liu

2016

BioResources

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A lignin-epoxy resin composite was prepared by blending lignin/wood flour with an epoxy resin and polyamine. The effects of the wood flour on the mechanical, thermal creep, and creep recovery properties, as well as the microstructure of the composite, were studied. Among the mechanical properties, the initial modulus increased with increasing content of wood flour. The glass transition temperature (Tg) decreased, and the thermal stability first decreased and then increased, as the wood flour content increased. As the wood flour's particle size was decreased, the initial modulus and other mechanical properties first increased and then decreased slightly. The Tg increased, and the thermal stability first decreased and then increased. The creep resistances of the composite were improved after the addition of the wood flour, and the 40 to 60 mesh wood flour exhibited better improvement than 60 to 120 mesh. The scanning electron microscopy (SEM) analysis revealed good interfacial bonding between the lignin, epoxy resin, and wood flour. Fiber breakage and fiber pullout were the main failure modes observed in this study.

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Mechanical properties and biodegradability of green composites based on biodegradable polyesters and lyocell fabric

Cited by 138 publications

References 15 publications

Thermo-mechanical performance of poly(lactic acid)/flax fibre-reinforced biocomposites

Thermo-mechanical performance of poly(lactic acid)/flax fibre-reinforced biocomposites

Aplicações de fibras lignocelulósicas na química de polímeros e em compósitos

Preparation and Properties of Wood Flour Reinforced Lignin-Epoxy Resin Composite

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