Composite material
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United States of America Patent
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N/A
Issued Date -
Sep 16, 2010
app pub date -
Jun 27, 2006
filing date -
Jun 30, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A composite material, including: an elastomer, carbon nanofibers having an average diameter of 0.7 to 15 nm and an average length of 0.5 to 100 micrometers; and carbon black having an average particle diameter of 10 to 100 nm and a DBP absorption of 100 ml/100 g or more, the carbon nanofibers and the carbon black being dispersed in the elastomer. The elastomer includes an unsaturated bond or a group exhibiting affinity to the carbon nanofibers. The composite material includes the carbon nanofibers in an amount of 1 to 30 vol % and the carbon black in an amount of 10 to 40 vol %. The composite material has an average coefficient of linear expansion of 100 ppm (1/K) or less and a differential coefficient of linear expansion of 120 ppm (1/K) or less at −80 to 300° C.
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