Effect of graphite size on the mechanical and electrical properties of epoxy composites for conductive polymer composites

Hendra Suherman, Abu Bakar Sulong, Mohamad Aisamudin Shuhaimi, Teuku Husaini, Jaafar Sahari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study aimed to analyze the effects of graphite size on the mechanical and electrical properties of epoxy as a conductive polymer composite. Epoxy composite can be used as bipolar material for proton-exchange membrane fuel cell (PEMFC). Graphite polymer composite has a high potential to replace pressed graphite because graphite polymer composite is low cost, lightweight, and can be produced in bulk. However, issues of graphite size and mixture composition and their effects on electrical conductivity and mechanical properties remain to be addressed. Therefore, two sizes of graphite with different properties were chosen and subjected to compression molding. Electrical conductivity testing was performed using a four-point probe, and a universal testing machine was used to examine the mechanical properties through a three-point bending test. Electrical conductivity of molded composite increased with increasing content of fillers. However, too high composite filler loading contributed to brittleness of the composite, which decreased its mechanical properties. The Archimedes method was used to measure porosity and density of samples. Data on electrical conductivity, three-point test, porosity, and density showed that at 74 wt% synthetic graphite (SG)1/6 wt.% SG2, the composition was suitable as a conductive material for PEMFC bipolar plate application.

Original languageEnglish
Title of host publication20th World Hydrogen Energy Conference, WHEC 2014
PublisherCommittee of WHEC2014
Pages500-506
Number of pages7
Volume1
ISBN (Print)9780000000002
Publication statusPublished - 2014
Event20th World Hydrogen Energy Conference, WHEC 2014 - Gwangju
Duration: 15 Jun 201420 Jun 2014

Other

Other20th World Hydrogen Energy Conference, WHEC 2014
CityGwangju
Period15/6/1420/6/14

Fingerprint

Graphite
Electric properties
Mechanical properties
Composite materials
Polymers
Proton exchange membrane fuel cells (PEMFC)
Density (specific gravity)
Fillers
Porosity
Artificial graphite
Conductive materials
Compression molding
Bending tests
Testing
Brittleness
Chemical analysis
Electric Conductivity
Costs

Keywords

  • Bipolar plate
  • Composite polymer composite (CPC)
  • Electrical conductivity
  • Graphite (G)
  • Mechanical properties

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology

Cite this

Suherman, H., Sulong, A. B., Shuhaimi, M. A., Husaini, T., & Sahari, J. (2014). Effect of graphite size on the mechanical and electrical properties of epoxy composites for conductive polymer composites. In 20th World Hydrogen Energy Conference, WHEC 2014 (Vol. 1, pp. 500-506). Committee of WHEC2014.

Effect of graphite size on the mechanical and electrical properties of epoxy composites for conductive polymer composites. / Suherman, Hendra; Sulong, Abu Bakar; Shuhaimi, Mohamad Aisamudin; Husaini, Teuku; Sahari, Jaafar.

20th World Hydrogen Energy Conference, WHEC 2014. Vol. 1 Committee of WHEC2014, 2014. p. 500-506.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Suherman, H, Sulong, AB, Shuhaimi, MA, Husaini, T & Sahari, J 2014, Effect of graphite size on the mechanical and electrical properties of epoxy composites for conductive polymer composites. in 20th World Hydrogen Energy Conference, WHEC 2014. vol. 1, Committee of WHEC2014, pp. 500-506, 20th World Hydrogen Energy Conference, WHEC 2014, Gwangju, 15/6/14.
Suherman H, Sulong AB, Shuhaimi MA, Husaini T, Sahari J. Effect of graphite size on the mechanical and electrical properties of epoxy composites for conductive polymer composites. In 20th World Hydrogen Energy Conference, WHEC 2014. Vol. 1. Committee of WHEC2014. 2014. p. 500-506
Suherman, Hendra ; Sulong, Abu Bakar ; Shuhaimi, Mohamad Aisamudin ; Husaini, Teuku ; Sahari, Jaafar. / Effect of graphite size on the mechanical and electrical properties of epoxy composites for conductive polymer composites. 20th World Hydrogen Energy Conference, WHEC 2014. Vol. 1 Committee of WHEC2014, 2014. pp. 500-506
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AB - This study aimed to analyze the effects of graphite size on the mechanical and electrical properties of epoxy as a conductive polymer composite. Epoxy composite can be used as bipolar material for proton-exchange membrane fuel cell (PEMFC). Graphite polymer composite has a high potential to replace pressed graphite because graphite polymer composite is low cost, lightweight, and can be produced in bulk. However, issues of graphite size and mixture composition and their effects on electrical conductivity and mechanical properties remain to be addressed. Therefore, two sizes of graphite with different properties were chosen and subjected to compression molding. Electrical conductivity testing was performed using a four-point probe, and a universal testing machine was used to examine the mechanical properties through a three-point bending test. Electrical conductivity of molded composite increased with increasing content of fillers. However, too high composite filler loading contributed to brittleness of the composite, which decreased its mechanical properties. The Archimedes method was used to measure porosity and density of samples. Data on electrical conductivity, three-point test, porosity, and density showed that at 74 wt% synthetic graphite (SG)1/6 wt.% SG2, the composition was suitable as a conductive material for PEMFC bipolar plate application.

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