Modified carbon nanotube-epoxy resin wave-absorbing coating and preparation process

The invention relates to the technical field of wave-absorbing coatings, and discloses a modified carbon nanotube-epoxy resin wave-absorbing coating and a preparation process thereof, triphenylphosphine is used as a catalyst, and an active carboxyl group of a carbon nanotube and an epoxy group of epoxy nano silicon carbide are subjected to an esterification reaction to obtain a nano silicon carbide modified carbon nanotube; the nano silicon carbide is loaded on the surface of the carbon nano tube in a chemical bonding manner, so that the dispersity of the nano silicon carbide is improved, agglomeration is reduced, the interface performance between the nano silicon carbide and the carbon nano tube is enhanced, and interface polarization loss and good impedance matching are formed; the wave-absorbing coating obtained by compounding and curing with epoxy resin has the advantages of low density, light weight and strong wave-absorbing performance, and can carry out loss and reflection on electromagnetic waves thro