| abstract |
The invention relates to a preparation method for continuous growth of carbon nanotubes on the surface of carbon fibers. The specific steps are as follows: first, carbon fibers are subjected to surface electrochemical anodic oxidation treatment, then immersed in Co(NO 3 ) 2 solution, and passed through a tube furnace. Entering hydrogen, the metal salt on the surface of the carbon fiber is reduced to a metal element. After the reduction, it is placed in a chemical vapor deposition furnace. Under the protection of hydrogen, acetylene is cracked at 500-800 ° C, and the surface of the carbon fiber is catalyzed by the metal element. Carbon nanotubes are generated, and carbon fiber reinforced polymer composites with surface-loaded carbon nanotubes are obtained. The carbon nanotubes are multi-walled and their tube walls are substantially parallel to the carbon nanotube axis. The morphology of multi-walled carbon nanotubes is composed of layer by layer. It is composed of graphite structure, the distance between the tube wall gaps is small, and the carbon fiber carbon nanotubes are evenly distributed and intertwined, which improves the delamination resistance and through-thickness performance. |