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Investigates friction and electrostatic charge in carbon fibre epoxy composites, highlighting safety for walking.
The present work discusses the effect of reinforcing epoxy by carbon fibres (CF) and coated by polyurethane on the generation of electrostatic charge (ESC) from contact and separation as well as sliding when bare foot and foot wearing rubber contacting epoxy. The relationship between ESC and friction coefficient will be discussed. It was found that contact and separation as well as sliding of the tested composites against rubber showed that epoxy surface gave the highest ESC followed by PU. The same trend was observed for friction coefficient especially at higher loads. Based on the quantification of floor slip-resistance, the static friction coefficient of 0.5 has been recommended as the slip resistant standard for normal walking conditions. For all the tested composites, friction coefficient fulfills that recommendation at relatively higher loads, which confirms that the floor made of the tested composites will be very safe for walking. Concerns should be directed to the amount of ESC generated during contact and separation as well as sliding of the tested materials against both bare foot and rubber footwear.
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Ali et al. (2018) studied this question.
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