Applications and Drawbacks Epoxy/Synthetic/Natural Fiber Hybrid Composites

Urquiza, Edgar Adrian Franco

doi:10.1007/978-981-15-8141-0_43-1

Cited by 1 publication

(4 citation statements)

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“…It is well known that graphene and graphene nanoplatelets (GNPs) have extraordinary mechanical properties and high specific surface area; 1,2 however, one of the main issues is their tendency to aggregate and re-stack due to Van der Waals forces of interaction 2 and re-agglomerate due to the lack of functional groups. 3 This tendency implies that a homogeneous dispersion of GNPs is paramount in enhancing composite properties. Therefore, the presence of GNPs agglomerates on sisal fiber fabric surface has an important effect on the mechanical properties of biocomposite laminates, because its formation causes a reduced interfacial interaction with the polymer matrix and hence stress concentrations into composite laminates after their fabrication.…”

Section: Resultsmentioning

confidence: 99%

“…The process used to obtain the sisal fibers was the mechanical extraction, and the configuration of the sisal fibers used for biolaminates manufacturing was a plain weave. 6 The elastic modulus, tensile strength, and density of sisal fibers are 13 GPa, 13 MPa, and 1.12 g/cm 3 , respectively. The matrix was a bio-based epoxy resin, namely, epoxidized vegetable oil (EVO) Surf Clear with an SD EVO fast hardener from Sicomin Epoxy Systems ® (France).…”

Section: Methodsmentioning

confidence: 99%

“…The results from these investigations allow visualizing industrial escape routes for the problem of the non-degradable nature of SFRC. 2,3 Unfortunately, the mechanical properties of natural fibers are lower than synthetic fibers, with no possibilities to be used for structural applications. Nevertheless, the manufacture of NFRC has attracted significant attention from the scientific and engineering community because of the environmental opportunities of natural fibers.…”

Section: Introductionmentioning

confidence: 99%

“…The results from these investigations allow visualizing industrial escape routes for the problem of the non-degradable nature of SFRC. 2,3…”

Section: Introductionmentioning

confidence: 99%

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Spray-coating of graphene nanoplatelets on sisal fibers and its influence on electromechanical behavior of biocomposite laminates

Rodríguez‐González

Rentería-Rodríguez

Rubio-González

et al. 2023

Journal of Reinforced Plastics and Composites

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Spray coating and vacuum-assisted resin infusion processes were implemented in this work to develop multifunctional biocomposite laminates. The biocomposites were fabricated using a bio-based epoxy resin reinforced with natural sisal fibers coated with graphene nanoplatelets (GNPs). A systematic characterization of material properties was performed to evaluate the mechanical, thermomechanical, electrical, and piezoresistive behavior of biocomposites with different GNPs contents (0, 1, 4, 6, and 8 wt.%). The mechanical tests revealed that adding GNPs to biocomposites has a slight positive effect on their flexural properties compared to the neat biocomposites (without GNPs). The electrical and thermomechanical tests showed that the electrical conductivity and glass transition temperature of biocomposites containing GNPs were enhanced significantly, achieving average values of 5.19 x 10-4 S/m and 63.29°C (26%), respectively. Regarding electromechanical tests, the biocomposites with 8 wt.% GNPs exhibited an excellent piezoresistive behavior under monotonic loading conditions, achieving a gage factor (strain sensitivity) of 3.56. Bending tests with cyclic loading were also performed, and cyclic reproducibility of the piezoresistive response of the biocomposites after 10 cycles was demonstrated, evidencing that the incorporation of GNPs onto sisal fibers by spray-coating produces an effective formation of conductive networks into biocomposites suitable for sensing applications.

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