Method for preparing carbon nanotube conductive sphere and method for preparing conductive adhesive containing carbon nanotube sphere

摘要

The present invention provides a method for preparing carbon nanotube conductive spheres and a method for preparing a conductive adhesive containing the carbon nanotube spheres. The method for preparing carbon nanotube conductive spheres in the present invention combines the stability of polymeric microspheres and SiO2 microspheres and the high conductivity of carbon nanotubes, and relates to using a polymeric microsphere or SiO2 microsphere as a base and wrapping same with a carbon nanotube material to obtain a spherical carbon nanotube conductive sphere. The method involves simple preparation processes with low equipment requirements, uses abundant raw materials, and has low costs and high efficiency. The prepared carbon nanotube conductive spheres have a controllable grain size, high material stability, and good conductivity performance, and are environment-friendly. In the method for preparing a conductive adhesive containing the carbon nanotube spheres in the present application, the carbon nanotube conductive spheres are applied in TFT-LEDs by being used as conductive particles to replace the conductive gold spheres commonly used in conductive adhesives at present. The method overcomes defects of traditional conductive adhesives such as high conducive filler content, high costs, complex preparation processes, and high rate of pollution to the environment. In addition, the prepared conductive adhesive containing the carbon nanotube spheres also has considerable promise in connections of ultra-fine circuitry.