Graphene-filled polypropylene composite material, and preparation method thereof

Abstract

The invention belongs to the technical field of composite material, and relates to a graphene-filled polypropylene composite material, and a preparation method thereof. The graphene-filled polypropylene composite material comprises, by weight, 0.5 to 2 parts of grapheme and 98 to 99.5 parts of polypropylene. According to the graphene-filled polypropylene composite material, polypropylene is taken as the substrate, and graphene is taken as the filling material; grapheme possesses a two-dimensional periodic honeycomb lattice structure composed of carbon six-member rings, and electron moving speed in grapheme reaches 1 / 300 of light speed, and far exceeds moving speed of electron is common conductors, so that conductive demands can be satisfied by adding a small amount of grapheme, continuity of the substrate material is not influenced, easy processing advantage of high-molecular materials is maintained, the graphene-filled polypropylene composite material possesses excellent PTC performance, electrical heating and overheating protection performance, and temperature limiting effects. In addition, the graphene-filled polypropylene composite material is prepared via melt blending; technology processes are simple; operation is convenient; repeatability is excellent; and the graphene-filled polypropylene composite material is suitable for large-scale industrialized production.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a graphene-filled polypropylene composite material and a preparation method thereof. Background technique [0002] Graphene appeared in the laboratory in 2004, and it was discovered that graphene has extraordinary electrical conductivity, strength dozens of times stronger than steel, and excellent light transmission. Its appearance is expected to trigger a revolution in the field of modern electronic technology. revolution. In graphene, electrons can move extremely efficiently, while traditional semiconductors and conductors, such as silicon and copper, do not perform as well as graphene. Due to its excellent electrical, mechanical and thermal properties, graphene has good application prospects in many fields such as field emission, microwave absorption, electrode materials, general-purpose polymer materials, etc. All countries in the world have increased investment in...

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Problems solved by technology

Materials with PTC effect basically used PTC ceramics in the past, and now there are also carbon black-polymer composite materials and carbon nanotube-polymer composite materials, but since carbon black and carbon nanotubes are not as conductive as graphene, not only a larger The amount added will reduce the continuity of the polymer collective material, leading to its strength destruction and performance degradation.

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