▎ 摘　　要

NOVELTY - Preparing polymer material/graphene nano composite material by continuous kneading in-situ reduction comprises e.g. (i) dissolving chemical reducing agent in deionized water to obtain specific concentration of chemical reducing agent aqueous solution, and placing in a liquid storage tank, (ii) starting the extruder of the water-assisted melt-kneading extrusion equipment, and adding the pre-mixed polymer material, kneading and extruding graphene oxide powder mixture to the extruder, and (iii) adjusting the extrusion processing parameters comprising feeding amount, screw rotation speed and temperature of each section of the barrel, so that the increasing melt pressure of the polymer material in the injection section of the extruder to maintain injected water liquid at a high temperature, injecting aqueous solution of chemical reducing agent obtained in the step (i) into the melt in the extruder from the water injection port at a specific flow rate by means of a metering pump. USE - The material is useful for preparing dielectric materials, electromagnetic shielding materials, thermal conductive materials and antistatic materials (claimed). ADVANTAGE - The material has good peeling and dispersing of RGO, high degree of reduction, good dielectric properties and mechanical properties. DETAILED DESCRIPTION - Preparing polymer material/graphene nano composite material by continuous kneading in-situ reduction comprises (i) dissolving chemical reducing agent in deionized water to obtain specific concentration of chemical reducing agent aqueous solution, and placing in a liquid storage tank, (ii) starting the extruder of the water-assisted melt-kneading extrusion equipment, and adding the pre-mixed polymer material, kneading and extruding graphene oxide powder mixture to the extruder, (iii) adjusting the extrusion processing parameters comprising the feeding amount, the screw rotation speed and the temperature of each section of the barrel, so that the increasing melt pressure of the polymer material in the injection section of the extruder to maintain the injected water liquid at a high temperature, injecting aqueous solution of the chemical reducing agent obtained in the step (i) into the melt in the extruder from the water injection port at a specific flow rate by means of a metering pump, (iv) The injected aqueous solution of reducing agent enters between adjacent graphene oxide sheets under the action of the screw of the extruder to promote the stripping and dispersion of graphene oxide in the melt of the polymer material and the in-situ chemical reduction and in situ thermal reduction, and (v) water vaporizes in the exhaust section of the extruder to form water vapor, pumping away from the exhaust port by vacuum pump, and extruding at the exit of the machine head, exfoliating and dispersing and highly reducing to obtain polymer material/graphene nano-composite.