Preparation method of polymer/graphene/carbon nanometer tube composite material

Abstract

The invention discloses a preparation method of a polymer / graphene / carbon nanometer tube composite material. The method comprises the following steps of respectively performing preparation in an acid water solution under the ultrasonic effect to obtain uniformly dispersed polystyrene microspheres, graphene and carbon nanometer tube suspension solutions; then, uniformly mixing the three kinds of prepared suspension solutions; giving opposite charges to the three kinds of suspension solutions through regulating and controlling the pH value of the mixed solution. Through the static mutual effect, the graphene and the carbon nanometer tubes are uniformly coated on the surface of the polystyrene microspheres to obtain polystyrene / graphene / carbon nanometer tube three-ingredient hybrids; finally, a polystyrene composite material with a three-dimensional graphene-carbon nanometer tube hybrid network is obtained through a hot pressing forming process. The obtained polystyrene / graphene / carbon nanometer tube three-ingredient hybrids can mutually inhibit the respective agglomeration behaviors; the graphene and the carbon nanometer tubes are promoted to build the three-dimensional hybrid network in the polymer substrates; a great number of conductive paths are formed. Under the condition of low filling consumption, the excellent conduction performance of the composite material can be obviously realized.

Description

technical field [0001] The invention relates to a preparation method of a polymer / graphene / carbon nanotube composite material, in particular to a preparation method of a conductive polymer composite material based on a graphene-carbon nanotube network. Background technique [0002] Due to their excellent electrical, thermal, and mechanical properties, graphene and carbon nanotubes are widely used in high-strength composite materials, conductive and heat-conductive composite materials, electrodes, and electronic devices. As a new type of conductive filler, the synergistic enhancement of graphene and carbon nanotubes can be more conducive to the preparation of highly conductive polymer composites. However, due to its strong van der Waals force, graphene is prone to irreversible agglomeration and stacking, making it difficult to exert its excellent properties in polymers. At the same time, due to its large aspect ratio and specific surface area, carbon nanotubes are also prone...

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Problems solved by technology

However, since the graphene-carbon nanotube hybrids with a three-dimensional structure are not easy to disperse uniformly in the solution, the dispersion of the hybrids in the polymer prepared by the in-situ dispersion polymerization method is poor, which further affects the construction of the conductive path, so that the hybrids A large amount of addition will affect the comprehensive performance of the composite material

Chinese patent CN105732036A has reported that polystyrene resin / graphene / carbon nanotube composites have been prepared by solution blending method. Since the conductive path of graphene-carbon nanotubes cannot be effectively regulated, a large amount of graphene and carbon nanotubes need to be added. Carbon nanotubes, higher percolation threshold, resulting in higher cost

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