Properties of graphite/epoxy composites: the in-plane conductivity, tensile strength and Shore hardness

Suherman, Hendra; Mahyoedin, Yovial; Septe, Edi; .Rizade, Roni

doi:10.3934/matersci.2019.2.165

Cited by 23 publications

(15 citation statements)

References 21 publications

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“…Filler loading of 65 to 80 wt% was used in this study due to the low value of in-plane electrical conductivity obtained below this percentage range. It is worth to mention that the work carried out in this study represents an extension to a previous work done by the same author, Suherman et al [23], on epoxy/G composites, who reported a maximum in-plane electrical conductivity of about 28 S/cm and a maximum tensile strength of about 14 MPa by optimizing the curing conditions at 80 wt.% G content of 150 µm particle size (G150).…”

Section: Introductionmentioning

confidence: 58%

“…Researchers found that combining a larger primary conductive filler with a smaller secondary conductive filler could increase the electrical conductivity value and improve the mechanical properties of the conductive composite. [23][24][25]. Chunhui et al [26] studied the influence of the incorporation of different sizes of conductive filler materials on the electrical conductivity of composite materials for the applications of bipolar plates in fuel cells.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the Electrical-Mechanical Performance of Epoxy/Graphite Composites Based on the Effects of Particle Size and Curing Conditions

et al. 2022

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This study aims to improve the electrical-mechanical performance of traditional epoxy/graphite composites for engineering applications. The improvement in the properties of these composites depended on the incorporation of different sizes of graphite particles of the same type and controlling their curing process conditions. The thermal properties and microstructural changes were also characterized. A maximum in-plane electrical conductivity value of approximately 23 S/cm was reported for composites containing 80 wt.% G with a particle size of 150 µm. The effect of combining large and small G particles increased this value to approximately 32 S/cm by replacing the large particle size with 10 wt.% smaller particles (75 µm). A further increase in the electrical conductivity to approximately 50 S/cm was achieved due to the increase in curing temperature and time. Increasing the curing temperature or time also had a crucial role in improving the tensile strength of the composites and a tensile strength of ~19 MPa was reported using a system of multiple filler particle sizes processed at the highest curing temperature and time compared to ~9 MPa for epoxy/G150 at 80 wt.%. TGA analysis showed that the composites are thermally stable, and stability was improved by the addition of filler to the resin. A slight difference in the degraded weights and the glass transition temperatures between composites of different multiple filler particle sizes was also observed from the TGA and DSC results.

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Section: Introductionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Improvement of the Electrical-Mechanical Performance of Epoxy/Graphite Composites Based on the Effects of Particle Size and Curing Conditions

et al. 2022

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“…Such high WF of NG was assigned due to low in plane DC conductance of GECs. However, in plane DC conductance of GECs could be improved through incorporation of large amount of conductive filler to achieve the desired level of DC conductance 45 . Another section comprise conductance measurements up to 20WF of NG (Fig.…”

Section: Electrical Conductancementioning

confidence: 99%

“…With WF of NG, tensile strength (MPa) of CE was raised from 30.35 to 42.7 and was stagnated to 43.70 till 300 WF of NG. GECs have shown an ultimate modification in tensile strength over CE by 43.98 per cent45 .…”

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confidence: 99%

Effect of Nanographite on Electrical Mechanical and Wear Characteristics of Graphite Epoxy Composites

2020

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Effect of weight fraction (WF) of nanographite (NG, 400 nm) on electrical, mechanical and wear and characteristics of graphite epoxy composites (GECs) were investigated. For this purpose, a series of GECs was prepared through dispersion of various WF of NG into epoxy resin, followed by curing with polyamine. Dispersion of NG into epoxy matrix and onward formation of GECs and was revealed through UV, Fourier transformed spectra and atomic force microscopy (AFM). Photoelastic analysis in combination with AFM reveals the presence of uniformly dispersed domain of NG into stress free GECs with fringe order ranging 0.23 - 0.61 under compression of 8 - 20 kgf. GECs have rendered a rising trend in DC conductance ranging 98.32 - 0.54 μS/cm with electrical percolation threshold at 175 WF of NG. GECs have shown enhanced compressive, impact, tensile, strength, Rockwell hardness and wear resistance at 200 WF of NG. In general, GECs has shown a marginal modification in their compressive strength by 5.30 % over cured epoxy. However, their impact and tensile strengths were largely improved to 31.78% and 43.98% over cured epoxy. The present manuscript provides a novel method of modification in electrical, mechanical and wear behaviour epoxy through introducing NG as a novel alternative to traditionally used graphite as filler for development of GECs.

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“…Rice straw has been investigated for its utilization in cement-based composites [27] and natural filler for injection-molded high-density polyethylene (HDPE) [29]. An optimization effort has also been conducted to achieve the possible highest impact strength for polymer composites application [28], [31].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fiber Loading and Alkali Treatment on Rice Straw Fiber Reinforced Composite for Automotive Bumper Beam Application

Saidah¹,

Susilowati²,

Nofendri³

2019

Int. J. Adv. Sci. Eng. Inf. Technol.

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Natural fiber-reinforced composites (NFC) comprise the principal subject for the wide-ranging research in the material industries with lower costs. The use of rice straw as the reinforcement material for polymer composites intended for car bumper application is reported. This study was aimed to evaluate the composite mechanical properties of tensile and impact strength, as well as the microscopic structures, under the alkali treatment of NaOH and 10, 20, 30 and 40% (v/v) fiber loading variations. The results showed that the mechanical properties of alkali-treated composites were improved relative to the untreated fiber-reinforced composites. The highest tensile strength was observed at 14.75 MPa together with the highest impact strength at 23.52 J cm -1 for the alkali-treated and 30% fiber loading composites. This makes the rice straw fiber-reinforced composites at 30% fiber loading competitive against the standard commercial bumper with a maximum tensile strength of 8.08 MPa and impact strength of 23.31 J cm-1. The precise claim of alkali conduct with sodium hydroxide indicates the improvement of tensile and impact strength of the RSF-reinforced composites. This study also shows fiber loading provides various mechanical properties of the composites. The rice straw fiber, at 30% fiber loading attached with the alkali treatment comprises an alternative material to reinforce a polymer composite for automotive bumper application with a viable tensile and effect strong point against a marketable bumper.

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Properties of graphite/epoxy composites: the in-plane conductivity, tensile strength and Shore hardness

Cited by 23 publications

References 21 publications

Improvement of the Electrical-Mechanical Performance of Epoxy/Graphite Composites Based on the Effects of Particle Size and Curing Conditions

Improvement of the Electrical-Mechanical Performance of Epoxy/Graphite Composites Based on the Effects of Particle Size and Curing Conditions

Effect of Nanographite on Electrical Mechanical and Wear Characteristics of Graphite Epoxy Composites

Effect of Fiber Loading and Alkali Treatment on Rice Straw Fiber Reinforced Composite for Automotive Bumper Beam Application

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