▎ 摘　　要

NOVELTY - Preparing continuous fiber reinforced polyhexahydrotriazine resin-based thermally conductive composite material comprises (i) uniformly dissolving the formaldehyde and aromatic amine in water/non-proton solvent mixed solution, stirring the resulting reaction solution and carrying out prepolymerization reaction at 40-100 degrees C for 5-90 minutes, adding thermal conductive filler and dispersing uniformly for 5-30 minutes to obtain prepolymer/thermal conductive filler mixed solution, (i) soaking the continuous fiber in the prepolymer/thermal conductive filler mixed solution, then removing the solvent by the heat flow channel and cooling to obtain prepreg, and (iii) hot pressing and solidifying the prepreg to obtain composite material. USE - The method is useful for preparing continuous fiber reinforced polyhexahydrotriazine resin-based thermally conductive composite material. ADVANTAGE - The composite material has excellent mechanical, heat-resistant and thermal conductivity properties and simple preparation process; and recycles and reuses prepared composite material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for continuous fiber reinforced polyhexahydrotriazine resin-based thermally conductive composite material obtained by above method, the mass percentage of the continuous fiber in the composite material is 30-75 wt.%, the mass percentage of the thermally conductive filler in the composite material is 1-40 wt.%, and the mass percentage of the polyhexahydrotriazine resin in the composite material is 20-50 wt.%; #recycling composite materials comprising soaking composite material in a strong acid/aprotic solvent mixed solution to separating fibers from the degrading acid solution, then washing with acid solution, water, alkali solution, and water, drying, recovering the fiber to obtain fiber, further filtering or centrifuging the degraded acid solution, then washing with acid solution, water, alkali solution, and water, drying and recovering to obtain thermal conductive filler, and neutralizing degraded acid solution by an alkaline solution, precipitating, filtering, washing with water and drying to obtain aromatic amine.