Abstract
ABSTRACT: Nancomposites manufacture has been developed rapidly, because of reinforcing effects of CNT in termsof mechanical, electrical and thermal properties. In this study, 10 wt% CNT paste was fabricated with good dispersionstate and easy processability. Damage sensing and reinforcing effect of CNT paste were investigated in nanocomposites.10 wt% CNT paste exhibited better tensile and flexural properties than those of general 1 wt% CNT nanocomposites.To observe the healing effect of CNT paste, a crack was made artificially with 30wt% CF30wt%/PP composites, andthe CNT paste was filled inside the crack. The damage sensing of CNT paste in CF30wt%/PP composites wasinvestigated by electrical resistance measurement and mechanical tests. CNT paste exhibited good reinforcing effect inmechanical properties of CF30wt%/PP composites, and this reinforcing effect was getting better with larger cracks.The reason was because CNT paste had good interfacial adhesion with CF30wt%/PP composites to resist crackpropagation. In electrical resistance measurement, there was a jump in electrical resistance signal at the adhesioninterface. The jumping signal could be used to predict fracture of CF/PP composites. CNT nanocomposites fordamage sensing had crack reducing effect and dama ge detection using electrical resistance method. 초록
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