Effect of graphite particulate on mechanical characterization of hybrid polymer composites

Abstract

Quest for producing lightweight and biodegradable materials has encouraged researchers to replace synthetic fibers with natural fibers. Hence a study is made to investigate the effects of introducing secondary reinforcement (natural fibers), stacking sequence, and addition of graphite particles on the mechanical characteristics and water uptakes along with diffusivity of hybrid (glass\jute) composites. Different weight fractions of graphite particulates are incorporated into the epoxy to produce different samples having 4 plies for each sample by hand layup vacuum bagging method. The obtained specimens are subjected to various mechanical tests, water absorption tests as per the ASTM standards, and optical microscopy was used to study the fracture morphology of the samples. The results displayed that the properties are deteriorated a little with the addition of secondary reinforcement, however they have improved with the addition of graphite. E-Glass as skin layer and treated jute as core layer composite exhibits ameliorate tensile strength (201.5 MPa), compression strength (515.12 MPa), flexural strength (106.9 MPa), hardness (25 BHN). However highest impact energy of 26 J is recorded for the sample with jute as skin layer and E-Glass as the core layer. Water absorption tests revealed that the addition of graphite has reduced the water absorption in the hybrid samples.

Effect of hybridization on physio-mechanical behavior of Vetiver and Jute fibers reinforced epoxy composites for structural applications: Studies on fabrication, physicomechanical, water-absorption, and morphological properties

“…Maximum tensile strength of 201.5 MPa, Impact strength of 26J, compressive strength of 515.12Mpa, flexural strength of 106.9Mpa has been recorded. 12 Similar studies of the addition of Graphite in buettneri fiber also improved the strength of the composites. 13 The addition of 8% graphite and 12% of Buettneri fiber has the optimum properties from all the samples being 31%, 32%, 105% and 150% enhancement in hardness, impact, thermal and wear properties.…”

The influence of addition of carbon nanotube and graphene platelets on characteristics of carbon/basalt fiber reinforced intra‐ply hybrid composites

“…In this condition, the introduced nanoparticles are responsible to bear the load along with the macro‐scale CBFE fibers as nanoreinforcement elements which leads to delay in crack generation and propagation in the structure of composite. The 0.5 wt.% of CNTs creates bonding sites to the polymer matrix which transfers entire load to the fibers and prevents separation between the fiber's surfaces and matrix 67 . This phenomenon made a better performance of 0.5 wt.% of multiscale CBFE composites than other types of fabricated composites in the case of tensile test.…”

“…The 0.5 wt.% of CNTs creates bonding sites to the polymer matrix which transfers entire load to the fibers and prevents separation between the fiber's surfaces and matrix. 67 This phenomenon made a better performance of 0.5 wt.% of multiscale CBFE composites than other types of fabricated composites in the case of tensile test. The values of elastic modulus and tensile strength as the results of tensile test were compared in Figure 9 for pure and multiscale CBFE intra-ply hybrid composites.…”

Synthesis and optimization for shape memory behaviour of 4D printed GNPs reinforced shape memory photopolymer composite

“…However, the functionality and performance of shape memory materials are significantly constrained by conventional manufacturing methods (Zhang et al , 2021a, 2021b). The traditional manufacturing techniques such as extrusion, melt casting and injection moulding is very laborious (Dhanunjayarao et al , 2022) to fabricate the SMPs for their complex geometries along with high resolution. At this junction, a researcher can take the advantage of advancements in computer-aided design (CAD) in conjunction with 3D printing techniques to fabricate SMPs and their composites in shorter durations with less human intervention (Chen et al , 2021), making excellent compatibility to apply for a variety of materials to get benefit from the drawback of conventional manufacturing methods (Nugroho et al , 2021).…”