Method for producing carbon fiber composite material

A carbon fiber composite material comprising:

• 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 fiber composite material has at least one of an interlayer peeling strength of 300 J/m2 or more, conductivity in a fiber axis direction of 0.1 S/cm or more, conductivity in a vertical direction with respect to the fiber axis direction of 10−5 S/cm or more, and a three-point bending strength of 500 MPa or more.

A producing method of a carbon fiber composite material comprising:

• forming a first carbon fiber dispersion layer by dispersing carbon fibers in a thermosetting resin;
• forming a carbon nanotube dispersion layer by dispersing carbon nanotubes in a thermosetting resin;
• and
• forming a second carbon fiber dispersion layer by dispersing carbon fibers in a thermosetting resin;
• wherein
• the carbon fiber composite material is formed by arranging the carbon nanotube dispersion layer 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.

A producing method of a carbon fiber composite material comprising:

• forming a first carbon fiber dispersion layer by dispersing carbon fibers in a thermosetting resin;
• forming a carbon nanotube dispersion layer by dispersing carbon nanotubes in a thermosetting resin;
• and
• forming a second carbon fiber dispersion layer by dispersing carbon fibers in a thermosetting resin;
• wherein
• the carbon fiber composite material is formed by being arranging the carbon nanotube dispersion layer between the first carbon fiber dispersion layer and the second carbon fiber dispersion layer;
• and
• the carbon fiber composite material has at least one of an interlayer peeling strength of 300 J/m2 or more, conductivity in a fiber axis direction of 0.1 S/cm or more, conductivity in a vertical direction with respect to the fiber axis direction of 10−5 S/cm or more, and a three-point bending strength of 500 MPa or more.