Effect of fiber surface modification on the mechanical and water absorption characteristics of sisal/polyester composites fabricated by resin transfer molding

Sreekumar, P.A.; Thomas, Selvin P.; Saiter, Jean Marc; Joseph, Kuruvilla; Unnikrishnan, G.; Thomas, Sabu

doi:10.1016/j.compositesa.2009.08.013

Cited by 334 publications

(251 citation statements)

References 41 publications

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“…Improved adhesion after treatment can lead to perfect bonding and thus the failure of composites can occur at relatively high impact strength. Composite having better interfacial bonding need more energy absorbing capacity when the crack propagation occurs along the fiber/matrix interface and this leads to a significant increase of impact strength [19]. The highest value of impact strength is for silane treated on alkalized CF composites with sample B is the optimal treatment and these are similar to the tensile analysis results.…”

Section: Impact Testsupporting

confidence: 78%

Effect of Chemical Treatment on Mechanical and Water-Sorption Properties Coconut Fiber-Unsaturated Polyester from Recycled PET

Abdullah

Ahmad

2012

ISRN Materials Science

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Coconut fibers were used as reinforcement for unsaturated polyester resin from recycled PET that has been prepared using glycolysis and polyesterification reaction. Various concentrations of alkali, silane, and silane on alkalized fiber were applied and the optimum concentration of treatments was determined. Morphological and mechanical properties of the composite have also been investigated to study the effect of fiber surface treatment. The influence of water uptake on the sorption characteristics of composites was studied via immersion in distilled water at room temperature. Surface treatment of coconut fiber caused a significant increase in the tensile properties with the optimum treatment of 0.5% silane on the 5% alkalized coconut fiber/polyester composites. For water absorption study, it was observed that the treated fiber composites showed lower water absorption properties in comparison to those of untreated fiber composites. SEM investigation showed that the surface modification of fiber has better fiber-matrix interaction. Thus, chemical treatments on the fiber improve fiber/matrix adhesion especially for silane on alkalized fiber treatment.

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Section: Impact Testsupporting

confidence: 78%

Effect of Chemical Treatment on Mechanical and Water-Sorption Properties Coconut Fiber-Unsaturated Polyester from Recycled PET

Abdullah

Ahmad

2012

ISRN Materials Science

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“…Um dos efeitos que contribuem para a adesão na interface é a atração física entre átomos polares da matriz e do reforço. Problemas de adesão entre a fibra e a matriz polimérica podem diminuir a transferência de esforços, comprometendo as propriedades mecânicas do compósito [19] . Assim, para promover uma maior adesão, as fibras são submetidas a um pré-tratamento superficial apropriado e/ou um agente de acoplamento é adicionado ao compósito.…”

Section: -Efeito Do Tratamento Alcalino De Fibras De Curauá Sobre As unclassified

Efeito do tratamento alcalino de fibras de curauá sobre as propriedades de compósitos de matriz biodegradável

Beltrami¹,

Scienza²,

Zattera³

2014

Polímeros

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Resumo: Neste trabalho avaliou-se a influência do tratamento alcalino das fibras de curauá, nas concentrações de 1, 5 e 10%(m/v) de NaOH, nas propriedades dos compósitos com matriz de PHBV e 20% m/m de fibras de curauá. Os compósitos foram moldados por extrusão e injeção e avaliadas suas as propriedades morfológicas, térmicas e mecânicas. Os resultados de FTIR mostraram que o tratamento alcalino promoveu modificações na estrutura das fibras de curauá, comprovadas pela remoção da hemicelulose e da lignina, evidenciadas pela ausência das bandas típicas destes compostos. Nos compósitos com fibras de curauá tratadas com solução de NaOH na concentração de 5% apresentaram um aumento de 30% na resistência à flexão e 12% na resistência ao impacto, quando comparados aos compósitos com fibras sem tratamento. Estes resultados indicam que o tratamento alcalino promoveu uma melhoria na adesão das fibras na matriz, o que melhorou significativamente as propriedades mecânicas dos compósitos. Palavras-chave: Compósitos, PHBV, fibras de curauá, tratamento alcalino. Effect of the Alkaline Treatments of Curauá Fiber on the Properties of Biodegradable Matrix CompositesAbstract: This study investigate the influence of alkaline treatment applied to Curauá fibers, at concentrations of 1, 5 and 10% (w/v) NaOH, on the properties of the composite of PHBV matrix with 20 wt % Curauá fiber. The composites were molded by extrusion and injection and their morphological, thermal and mechanical properties were evaluated. The results showed that alkali treatment caused modifications in the structure of the Curauá fibers by the removal of hemicellulose and lignin, as evidenced by the absence of the typical bands of these compounds in FTIR analysis. It was found an increase of 30% in flexural strength and 12% in impact resistance for the composites with fibers treated in 5% NaOH solution, in relation to composites with fibers without treatment. These results indicate that the alkaline treatment promoted an improvement in the adhesion of the fibers to the matrix, which significantly improved the mechanical properties of the composites. However, concentrations of NaOH solution different from 5% may have a deleterious effect on the mechanical properties of the fibers and composites.

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“…The improvement of Young`s modulus may be due to the high disaggregation of fibers with elevated elastic modulus. Meanwhile soaking the composite in oil for 24 h did not show any notable effect on the composite elasticity [33,34] as in Fig. 5a.…”

Section: Effect Of Chemical Treatment On the Composites` Mechanical Pmentioning

confidence: 84%

Characterization of Plastic Composite Based on HIPS Loaded with Bagasse

El-Sayed¹,

Nagiebb

El‐Sayed

2017

Egypt. J. Chem.

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THE AVAILABILITY of natural fibers in Egypt such as bagasse, rice straw, corn husk, etc attracted the researcher interests to reutilize this agricultural biomass for the development of natural fiber reinforced composites for diversity valuable applications. Recently the utilization of bio-fillers in thermoplastics composites has increased. Polystyrene is a thermoplastic polymer that is commercially available with a wide range of high impact polystyrene (HIPS) applications in various fields because of its mechanical properties. So natural fiber reinforced thermoplastic polystyrene composites can be used as natural wood substitutes in housing, and constructions purposes. Herein we used sugarcane bagasse as a natural filler for HIPS. Where HIPS was melted and mixing with sugarcane bagasse at different ratios using screw extruder, then the fiber/polymer mixture was molded into standard test samples under pressure and heating. The effect of external effectors such as slight aqueous acidic, alkaline solutions, engine oil treatments or UV exposure on the mechanical properties of the prepared composites was investigated. Additionally, the impact of filler content on polystyrene thermal stability and morphological characteristics, water absorption, and swelling capacity were studied.

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Effect of fiber surface modification on the mechanical and water absorption characteristics of sisal/polyester composites fabricated by resin transfer molding

Cited by 334 publications

References 41 publications

Effect of Chemical Treatment on Mechanical and Water-Sorption Properties Coconut Fiber-Unsaturated Polyester from Recycled PET

Effect of Chemical Treatment on Mechanical and Water-Sorption Properties Coconut Fiber-Unsaturated Polyester from Recycled PET

Efeito do tratamento alcalino de fibras de curauá sobre as propriedades de compósitos de matriz biodegradável

Characterization of Plastic Composite Based on HIPS Loaded with Bagasse

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