Abstract
Ultra thin fiber reinforced plastic plates, with around l0μm thickness, were fabricated using the uni-directionally aligned carbon nanotube (CNT) sheet. The CNT sheets are drawn wound around the bobbin from the CNT array developed on the silica glass base plate. The CNT used in this study was multi-walled CNT with diameter of around 40 nm. The CNT/epoxy resin prepreg was created by heating the CNT sheet put on the epoxy resin sheet at the temperature of 100℃ for 3 minutes using a hotpress. The CNT/epoxy resin composite material is laminated on the symmetrical cross ply lamination ([90/0]s). To minimize the content of epoxy resin to have thinner thickness, the CNT sheet with out resin were used to 0° layers and the prepreg to 90° layers. The total thickness of the composite became around 40 μm with high volume fraction of ≈ 30 to 50 %. However, the modulus and strength of the composites in tensile test became low. The low modulus attributes from the ply thickness un-uniformity where 0° ply thickness became about 1.5 times larger than 90° ply. Because of this thickness un-uniformity, CNT volume fraction in 0° plies became small to make tensile modulus low To improve mechanical properties of thin CNT composite film, process optimization to have thinner and uniform ply thickness were required as a future work.
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