Composite Material and Reinforcing Fiber

Abstract

Provided are a composite material and a reinforced fiber. The composite material includes a fiber and a plurality of carbon nanotubes disposed on a surface of the fiber. The carbon nanotubes adhere directly to the surface of the fiber.

1 . A composite material comprising:
 a fiber; and   a plurality of carbon nanotubes adhering directly to a surface of the fiber.   
     
     
         2 . The composite material according to  claim 1 , wherein the carbon nanotubes adhere directly to the surface of the fiber, without any intervening material. 
     
     
         3 . The composite material according to  claim 2 , wherein the intervening material includes at least a dispersing agent. 
     
     
         4 . The composite material according to  claim 1 , wherein the fiber has a diameter of approximately 3 to 150 μm. 
     
     
         5 . The composite material according to  claim 4 , wherein the fiber is a carbon fiber. 
     
     
         6 . The composite material according to  claim 1 , wherein the carbon nanotubes include multi-walled carbon nanotubes each having a length of 0.1 to 50 μm and a diameter of 30 nm or less. 
     
     
         7 . The composite material according to  claim 6 , wherein the carbon nanotube has a diameter of 20 nm or less. 
     
     
         8 . A reinforced fiber comprising:
 the composite material according to  claim 1 ; and   a resin composition covering a surface of the composite material.