https://www.repository.cam.ac.uk/bitstream/1810/279810/1/Authors%20copy.pdf

Towards the design of high-performance plant fibre composites

Abaca fibers demonstrate enormous potential as reinforcing agents in composite materials. In this study, abaca fibers were immersed in 5, 10 or 15 wt.% NaOH solutions for 2 h, and the effects of the alkali treatments on the mechanical characteristics and interfacial adhesion of the fibers in a model abaca fiber/epoxy composite system systematically evaluated. After 5 wt.% NaOH treatment, abaca fibers showed increased crystallinity, tensile strength and Young’s modulus compared to untreated fibers, and also improved interfacial shear strength with an epoxy. Stronger alkali treatments negatively impacted fiber stiffness and suitability for composite applications. Results suggest that mild alkali treatments (e.g. 5 wt.% NaOH for 2 h) are highly beneficial for the manufacture of abaca fiber-reinforced polymer composites.

Effect of alkali treatment on interfacial bonding in abaca fiber-reinforced composites

The effects of fibre content (5–30 wt%) and fibre treatment on surface morphology, tensile, flexural, thermal and biodegradable properties of polylactic acid (PLA)/coir fibre biocomposites were evaluated via scanning electron microscopy (SEM), mechanical testing, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and soil burial method. Similar decreasing trends were found for tensile and flexural strengths with higher strength values obtained for PLA/treated coir fibre biocomposites. 20 wt% treated coir fibres were determined to achieve optimum tensile and flexural strengths of biocomposites. Regardless of fibre treatment, the thermal stability of biocomposites is worsened with increasing the fibre content. The decreased cold crystallisation temperatures of biocomposites further confirms the effective nucleating agent role of coir fibres. The biocomposites undergo much faster degradation than PLA, with the maximum weight loss of 34.9% in treated fibre biocomposites relative to 18% in PLA after 18-day burial, arising from the hydrophilic nature of coir fibres.

/pdf/polylactic-acid-pla-biocomposites-reinforced-with-coir-37cielbeqv.pdf

Polylactic acid (PLA) biocomposites reinforced with coir fibres: Evaluation of mechanical performance and multifunctional properties

Effect of fiber treatment on flexural properties of natural fiber reinforced composites: A review

Hybrid composites are manufactured by combining two or more fibers in a single matrix. Hybrid composites can be made from artificial fibers, natural fibers and with a combination of both artificial and natural fibers. Hybrid composites can help us to achieve a better combination of properties than fiber reinforced composites. The constituent fibers in a hybrid composite can be altered in a number of ways leading to variation in its properties. The importance of this review can be attributed to the significant aspects of natural fiber based hybrid composites which are found to be predominantly affected by factors which include variation in fiber volume/weight fraction, variation in stacking sequence of fiber layers, fiber treatment and environmental conditions.

A review on mechanical behavior of natural fiber based hybrid composites

The poly(butylene succinate) (PBS) biodegradable composites reinforced with coir fibers were developed. The effect of alkali treatment on the surface morphology and mechanical properties of coir fibers, interfacial shear strength (IFSS) and mechanical properties of coir fiber/PBS composites was studied. The effect of fiber mass content varying from 10% to 30% on the mechanical properties of coir fiber/PBS composites was also investigated. The coir fibers which are soaked in 5% sodium hydroxide solution at room temperature (RT) for 72 h showed the highest IFSS with 55.6% higher than untreated coir fibers. The mechanical properties of alkali-treated coir fiber/PBS composites are significantly higher than those of untreated fibers. The best mechanical properties of alkali-treated coir fiber/PBS composite were achieved at fiber mass content of 25% in this study, which showed an increase of tensile strength by 54.5%, tensile modulus by 141.9%, flexural strength by 45.7% and flexural modulus by 97.4% compared to those of pure PBS resin. The fiber surface morphologies and fractured surface of the composites exhibited an improvement of interfacial fiber–matrix adhesion in the composites reinforced with alkali-treated coir fibers.

Effect of alkali treatment on interfacial and mechanical properties of coir fiber reinforced poly(butylene succinate) biodegradable composites

The poly(butylene succinate) (PBS) biodegradable composites reinforced with jute fibers were developed. The effect of fiber content (10–60wt%) on the properties and water absorption of jute/PBS biodegradable composites was studied. The effect of alkali, silane, and combined alkali and silane surface treatment on the properties and water absorption of jute/PBS composites was investigated. The mechanical properties of surface treated jute/PBS composites were significantly higher than those of untreated ones. Compared with alkali or silane treatment, the combined alkali and silane surface treatment showed better mechanical properties of jute/PBS composites. The best mechanical properties of jute/PBS composites were achieved at 50wt% in this study, which showed an increase in tensile strength by 517.9%, tensile modulus by 3529.8%, flexural strength by 302.6%, and flexural modulus by 1949.1% compared with those of PBS resin. Fractured surface morphologies of composite specimens exhibited an improvement of inte...

Mechanical and thermal properties and water absorption of jute fiber reinforced poly(butylene succinate) biodegradable composites

The poly(lactic acid) (PLA) biodegradable composites reinforced with short coir fibers were developed and studied. The effect of fiber mass content varying from 10 to 50% on mechanical and thermal properties of coir/PLA composites have been studied in terms of tensile properties, thermal stability and thermal expansion.The effect of alkali treatment on interfacial shear strength (IFSS), mechanical and thermal properties of coir/PLA composites was investigated. The coir fibers which are soaked in 5% sodium hydroxide solution at room temperature for 72 h showed the highest IFSS at 72.8% higher than untreated coir fibers. Alkali treatment of coir fibers enhanced the tensile properties of coir/PLA composites. The best tensile strength of coir/PLA composite was achieved at fiber mass content of 20% in this study. Below about 370°C, the coir/PLA biodegradable composites are found to have much higher thermal stability compared to coir fiber, but lower than that of PLA resin. Alkali-treated coir/PLA comp...

Interfacial, mechanical and thermal properties of coir fiber-reinforced poly(lactic acid) biodegradable composites

https://www.jstage.jst.go.jp/article/jmmp/5/6/5_6_251/_pdf

Tran Huu Nam

Papers

Effect of alkali treatment on interfacial and mechanical properties of coir fiber reinforced poly(butylene succinate) biodegradable composites

Mechanical and thermal properties and water absorption of jute fiber reinforced poly(butylene succinate) biodegradable composites

Interfacial, mechanical and thermal properties of coir fiber-reinforced poly(lactic acid) biodegradable composites

Mechanical and Thermal Properties of Short Coir Fibre Reinforced Poly(Butylene Succinate) Biodegradable Composites

Heat build-up and dynamic compressive behavior of anisotropic magnetorheological elastomer