▎ 摘　　要

NOVELTY - In-situ thermal reduction polyarylether nitrile/graphene oxide thermally conductive composite film, is claimed. The conductive film is a nanocomposite material obtained by the in-situ thermal reduction of polyarylether nitrile and graphene oxide. The thermal conductivity of the composite film is controlled by changing the addition amount of the graphene oxide and the performance of the composite film is further improved by hot-stretching the polyarylether nitrile of different structure. USE - The composite film is useful in the field of electronics, aerospace and aviation. ADVANTAGE - The composite film has mechanical strength of 80-120 MPa and thermal conductivity of 38-45 w/mK (claimed), and is light weight. The method is simple and suitable for industrial production. DETAILED DESCRIPTION - In-situ thermal reduction polyarylether nitrile/graphene oxide thermally conductive composite film, is claimed. The conductive film is a nanocomposite material obtained by the in-situ thermal reduction of polyarylether nitrile and graphene oxide. The thermal conductivity of the composite film is controlled by changing the addition amount of the graphene oxide and the performance of the composite film is further improved by hot-stretching the polyarylether nitrile of different structure. Preparation of the composite film as follows: (i) dissolving graphene oxide in N-methylpyrrolidone and ultrasonic processing for 1-3 hours under normal temperature and pressure to obtain uniformly dispersed graphene oxide solution with the concentration of 5-25 mg/ml; (ii) dissolving polyarylether nitrile in the graphene oxide solution, continuously stirring the mixture at 60-100 degrees C for 1-3 hours to obtain 25-50 mg/ml concentration polyarylether nitrile/graphene mixed solution; (iii) continuously ultrasonic processing the polyarylether nitrile/graphene mixed solution at 60-80 degrees C for 1-3 hours to obtain homogeneous polyarylene ether nitrile/graphene oxide mixed solution; (iv) pouring the homogeneous polyaryleneether nitrile/graphene oxide mixed solution onto a horizontally-set glass plate by cast film forming method; (v) placing the cast film in an oven and slowly evaporating the solvent by the programmed temperature heating to obtain the polyaryleneether nitrile/graphene oxide composite film, where the programmed temperature heating is: 80 degrees C for 1 hour, 100 degrees C for 1 hour, 1200 degrees C for 2 hour and 160 degrees C for 2 hour; and (vi) subjecting the polyaryleneether nitrile/graphene oxide composite film to in-situ thermal reduction at 200 degrees C in an oven to obtain composite film.