| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Research Abstract |
This study examined the mechanical properties of aligned NWCNT/ epoxy composites processed using a hot-melt prepreg method. Vertically aligned ultra-long CNT arrays were synthesized using CVD with high growth rate, and were converted to horizontally aligned CNT sheets. An aligned CNT /epoxy prepreg was fabricated using hot-melting with B-stage cured epoxy resin film. The resultant composites exhibit high Young's modulus and tensile strength.
For example, the maximum elastic modulus and ultimate tensile strength of a CNT (32.8 vol.%) /epoxy composite were 89 GPa and 239 MPa. CNT orientation angle distribution was quantitatively examined. Mori-Tanaka theory was adopted to estimate the elastic moduli of the composites. The numerical calculation results suggested that the Young's moduli of unidirectional CNT composites (32 vol.%) and 2-D randomly oriented CNT composites (35 vol.%) are almost equal to those of unidirectional and quasi-isotropic CFRP laminates, respectively.
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