Abstract: Provided is a cross-linked rubber that can improve long-term sealing properties of a seal member in high-temperature and high-pressure environments. The cross-linked rubber is obtained through cross-linking of a cross-linkable rubber composition containing a fluororubber, carbon black, one or more carbon nanotubes, and an organic peroxide cross-linker, and has a 50% modulus of 5 MPa or more, a compression set (230° C., 500 hours) of 80% or less, and a rate of change of elongation at break between before and after a heat aging test (230° C., 72 hours) of not less than ?10% and not more than 10%.

Abstract: Provided is a cross-linked rubber that can improve long-term sealing properties of a seal member in high-temperature and high-pressure environments. The cross-linked rubber is obtained through cross-linking of a cross-linkable rubber composition containing a fluororubber, carbon black, one or more carbon nanotubes, and an organic peroxide cross-linker, and has a 50% modulus of 5 MPa or more, a compression set (230° C., 500 hours) of 80% or less, and a rate of change of elongation at break between before and after a heat aging test (230° C., 72 hours) of not less than ?10% and not more than 10%.

Abstract: A carbon nanotube-elastomer composite material according to the present invention is produced by dispersing a carbon nanotube in an elastomer, including a carbon nanotube having a diameter of 20 nm or less, the number of layers of 10 or less, the carbon nanotube being contained in an amount of 0.1 to 20 parts by weight inclusive relative to the total weight of the carbon nanotube and the elastomer, and a continuous network having a Va/V0 value of 0.5 or more is formed in the elastomer wherein V0 represents the initial volume of the composite material and Va represents the volume of the structure formed from the remaining carbon nanotubes when the composite material is maintained at a temperature of 400° C. or higher for 6 hours while introducing nitrogen, the elastomer is thermally decomposed and the remaining carbon nanotubes form a structure.

Abstract: A carbon nanotube-elastomer composite material according to the present invention contains carbon nanotubes and an elastomer, which contains the carbon nanotubes in a range of 0.1 part by weight to 20 parts by weight relative to the total weight of the carbon nanotubes and the elastomer, and in which the elastomer has a thermal decomposition temperature of 150° C. or more, and supposing that the resulting storage modulus is E?(t) when the carbon nanotube-elastomer composite material is maintained at 150° C. for t hours, a ratio E? (24)/E?(0) between a storage modulus E? (0) at the time of t=0 hour and a storage modulus E?(24) at the time of t=24 hours is set in a range from 0.5 or more to 1.5 or less in the resulting carbon nanotube-elastomer composite material.

Abstract: Provided are a carbon fiber composite material and a producing method thereof comprising an adhesive layer having excellent conductivity and high peeling strength. A carbon fiber composite material according to the present application includes a first carbon fiber dispersion layer having carbon fibers dispersed in a thermosetting resin, a carbon nanotube dispersion layer having carbon nanotubes dispersed in a thermosetting resin, and a second carbon fiber dispersion layer having carbon fibers dispersed in a thermosetting resin, wherein the carbon nanotube dispersion layer is arranged between the first carbon fiber dispersion layer and the second carbon fiber dispersion layer, and the carbon nanotubes in the carbon nanotube dispersion layer are arranged in close contact with the carbon fibers of the first carbon fiber dispersion layer and the carbon fibers of the second carbon fiber dispersion layer.

Abstract: Provide is a carbon nanotube composite material and conductive material to solve the problems of the prior art described above by providing a high conductivity and showing excellent durability against repeated stress such as strain. A carbon nanotube composite material of the invention is a conductive material having carbon nanotubes dispersed in a matrix including observing a peak in each region of 110±10 cm?1, 190±10 cm?1 and 200 cm?1 or more in a Raman spectroscopic analysis at a wavelength of 633 nm, and a ratio R/R0 of an electrical resistance R after a load of repeated stress of 100 times at 10% elongation with respect to an electrical resistance R0 prior to applying a load is 5 or more. In addition, a conductive material of the invention comprises these characteristics of the carbon nanotube composite material.

Abstract: A carbon nanotube-elastomer composite material according to the present invention is produced by dispersing a carbon nanotube in an elastomer, including a carbon nanotube having a diameter of 20 nm or less, the number of layers of 10 or less, the carbon nanotube being contained in an amount of 0.1 to 20 parts by weight inclusive relative to the total weight of the carbon nanotube and the elastomer, and a continuous network having a Va/V0 value of 0.5 or more is formed in the elastomer wherein V0 represents the initial volume of the composite material and Va represents the volume of the structure formed from the remaining carbon nanotubes when the composite material is maintained at a temperature of 400° C. or higher for 6 hours while introducing nitrogen, the elastomer is thermally decomposed and the remaining carbon nanotubes form a structure.

Abstract: A CNT composite material includes a CNT group and carbon fibers dispersed in a matrix, the CNT composite material includes 0.01 wt % or more and 30 wt % or less of CNT aggregate. The CNT group includes a three dimensional network structure with a size of 10 ?m or more and has a maximum distribution range of a differential pore volume of 0.01 ?m or more and 10 ?m or less in a range of 4 nm or more and 1000 ?m or less of a pore diameter. The carbon fibers have a maximum distribution range of a differential pore volume of 1 ?m or more and 100 ?m or less in a range of 4 nm or more and 1000 ?m or less of a pore diameter. A total specific surface area of the CNT aggregate and the carbon fibers is 10 m2/g or more and 500 m2/g or less.

Abstract: A CNT composite material includes a CNT group and carbon fibers dispersed in a matrix, the CNT composite material includes 0.01 wt % or more and 30 wt % or less of CNT aggregate. The CNT group includes a three dimensional network structure with a size of 10 ?m or more and has a maximum distribution range of a differential pore volume of 0.01 ?m or more and 10 ?m or less in a range of 4 nm or more and 1000 ?m or less of a pore diameter. The carbon fibers have a maximum distribution range of a differential pore volume of 1 ?m or more and 100 ?m or less in a range of 4 nm or more and 1000 ?m or less of a pore diameter. A total specific surface area of the CNT aggregate and the carbon fibers is 10 m2/g or more and 500 m2/g or less.

Abstract: Provide is a carbon nanotube composite material and conductive material to solve the problems of the prior art described above by providing a high conductivity and showing excellent durability against repeated stress such as strain. A carbon nanotube composite material of the invention is a conductive material having carbon nanotubes dispersed in a matrix including observing a peak in each region of 110±10 cm?1, 190±10 cm?1 and 200 cm?1 or more in a Raman spectroscopic analysis at a wavelength of 633 nm, and a ratio R/R0 of an electrical resistance R after a load of repeated stress of 100 times at 10% elongation with respect to an electrical resistance R0 prior to applying a load is 5 or more. In addition, a conductive material of the invention comprises these characteristics of the carbon nanotube composite material.

Abstract: A carbon nanotube composite material capable of exhibiting a high conductivity with a small amount of carbon nanotubes is realized. A carbon nanotube composite material according to the present invention contains carbon nanotubes dispersed in a matrix and includes a carbon nanotube group formed of a plurality of carbon nanotubes, and a basic material area. The carbon nanotubes are contained in an amount of 0.0001% by weight or greater and 1.0% by weight or less; and the carbon nanotube composite material has a conductivity of 10?7 S/cm or greater.

Abstract: A carbon nanotube composite material having carbon nanotubes and carbon fibers dispersed in a matrix is provided wherein a carbon nanotube group formed from a plurality of the carbon nanotubes is present between the carbon fibers, an average diameter of the carbon fibers is 1 ?m or more and 50 ?m or less, an average diameter of the carbon nanotubes is 0.7 nm or more and 50 nm or less, the carbon nanotubes are included in a range of 0.01 wt % or more and 30 wt % or less and the carbon fibers are included in a range of 10 wt % or more and 60 wt % or less with respect to 100 wt % of the carbon nanotube composite material, thermal conductivity of the matrix is less than 10 W/mK, and the carbon nanotube composite material includes thermal conductivity in a direction of 10 W/mK or more.