Method for preparing core-shell type carbon nano tube dielectric packing through in-situ copolymerization technology

The invention discloses a method for preparing core-shell type carbon nano tube dielectric packing through the in-situ copolymerization technology. According to the method, the characteristic that micromolecules (divinyl benzene) containing benzene rings and surfaces of carbon nano tubes are prone to generating physical absorption through pi-pi conjugation is used, second monomers (maleic anhydride) are added with the micromolecule monomers serving as a bridge, the surfaces of the carbon nano tubes are activated through BPO to generate active free radical centers and initiate polymerization of divinyl benzene, copolymerization of the maleic anhydride and the divinyl benzene is initiated further, and therefore copolymer cladding layers are formed on the surfaces of the original carbon nano tubes. The carbon nano tubes are ultrasonically dispersed in solvent, an initiator is added, the monomers react under the condition of temperature rise, and a series of core-shell type carbon nano tube dielectric packing with different cladding thicknesses is obtained by adjusting the proportion among the initiator and the two kinds of mononers. Pretreatment processes such as acidification and oxidization on the surfaces of the carbon nano tubes are not needed, the technology is simple, and the dielectric packing with the controllable cladding layers can be prepared in a mass mode; as the solvent is nontoxic, the method has good industrialization prospects.