石墨烯与碳纳米管混杂增强金属基复合材料及其制备方法

Graphene and carbon nanotube mixed enhanced metal-matrix composite material and preparation method thereof

Abstract

本发明公开一种石墨烯与碳纳米管混杂增强金属基复合材料及其制备方法,其特征在于,石墨烯和碳纳米管相互连接,在金属基体当中构成增强网络,其中,石墨烯为10层以内的寡层石墨烯,其径厚比大于200,体积分数为0.1%至1%;碳纳米管为单壁、双壁或多壁碳纳米管,其长径比大于20,体积分数为0.5%至5%。与碳纳米管单一增强的复合材料相比,本发明的石墨烯与碳纳米管混杂增强金属基复合材料不仅力学性能大大改善,而且具有更加优异的导电和导热性能,是一种多用途的结构功能一体化材料。此外,本发明基于料浆共混和氧化石墨烯还原而提出的制备方法,简单、高效,易于规模化生产。
The invention discloses a graphene and carbon nanotube mixed enhanced metal-matrix composite material and a preparation method thereof. The graphene and carbon nanotube mixed enhanced metal-matrix composite material is characterized in that graphene and a carbon nanotube are mutually connected to constitute an enhanced network in a metal matrix, wherein the graphene is few-layer graphene with 10 layers or less, the radius-thickness ratio of the graphene is larger than 200, and the volume fraction of the graphene is 0.1-1%; and the carbon nanotube is a single-wall, double-wall or multi-wall carbon nanotube, the length-diameter ratio of the carbon nanotube is larger than 20, and the volume fraction of the carbon nanotube is 0.5-5%. Compared with the composite material enhanced only by the carbon nanotube, the graphene and carbon nanotube mixed enhanced metal-matrix composite material disclosed by the invention not only has greatly improved mechanical properties, but also has more excellent electric conduction and heat conduction properties, and is a multi-purpose structure and function integrated material. In addition, the preparation method provided by the invention based on slurry blending and graphene oxide reduction is simple and efficient and is easy for large-scale production.

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