| Budget Amount *help |
¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2011: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
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| Research Abstract |
We studied mechanical properties of carbon nanotube (CNT) yarns and CNT composites reinforced by the CNT yarns. A carbon nanotube (CNT) web, drawn from a densely grown CNT array, was twisted to form a spun CNT yarn. No chemical binder materials was used to bind CNTs, and CNTs were connected by van der Waals forces. By condensing CNTs in a yarn, tensile strength and stiffness were improved. The CNT yarns were used in CNT/epoxy composites as reinforcing materials. From tensile tests and observation of fracture surfaces, we found that a CNT yarn composite is not reinforced by CNT yarns but by single CNTs dispersed in epoxy matrix.
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