Effect Of Carbon Black Loading On The Properties Of Graphite – Epoxy Composite For Flow Channel Fabrication

Phua, Hou Jie (2020) Effect Of Carbon Black Loading On The Properties Of Graphite – Epoxy Composite For Flow Channel Fabrication. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The addition of conducting fillers into composites will increase the electrical conductivity of the composite. However, the electrical conductivity and other performance aspects of the composite such as flexural strength and hardness will have adverse effect when content of fillers such as carbon black and graphite increased beyond certain extend, which is an effect due to percolation threshold. Conductive fillers are commonly added in polymer composite in fabrication of bipolar plate’s component such as flow and cooling channels. The percentage content of each filler material and resin must be in correct proportion to achieve the bipolar plate performance target set up by US DOE. This work studies how the variation of carbon black content in an epoxy–matrix composite which contain another conductive filler: graphite can affect the performance of bipolar plate by examine corresponding variation in electrical conductivity, flexural strength, shore hardness, and bulk density. The flow channels produced are examined by their dimensions and compared with drawing to understand the effectiveness and accuracy of hot compression method in fabrication of flow channel used. This work will provide insight to the best practice of correct proportion to be used in preparing a GR/CB/EP composite for best performance in bipolar plate application and suitability of hot compression method in fabrication of flow channel.

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