Carbon nanotube network/polymer composite material and preparation method thereof

Abstract

The invention discloses a carbon nano-tube network / polymer composite material. The carbon nano-tubes are mutually tangled to form a network structure, wherein the outer surface of the carbon nano-tube is uniformly wrapped with a polymer, and the carbon nano-tube and the polymer are all independently existed in a non-aggregated state. Compared with the prior art, the carbon nano-tube is existed in a non-aggregated state and the polymer is existed in a non-enriched state; by adopting the carbon nano-tube network / polymer composite material, the shortcomings of the traditional carbon nano-tube composite material such as the agglomeration of the carbon nano-tubes and the low content are solved, meanwhile, the excellent mechanical property, electrical property and thermal property of the carbon nano-tube are kept, and the carbon nano-tube is excellent in self-supporting property and is easy to process in the using process and has a wide application future in the fields such as the electromagnetic shielding materials, functional intelligent materials and electrode materials.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a carbon nanotube network / polymer composite material and a preparation method thereof. Background technique [0002] Carbon nanotubes are one-dimensional nanomaterials composed of graphite curls. They have the characteristics of light weight, high specific surface area, functional surface structure, high strength, high modulus and high flexibility. It is an ideal reinforcement material for impact composite materials. As a conductor, it can also make composite materials have various properties such as antistatic, microwave absorption, and electromagnetic shielding. The combination of carbon nanotubes and polymer materials can realize the complementary advantages or enhancements between different materials. Using carbon nanotubes as fillers to combine with other materials has become an important direction to expand the application field of carbon nanotubes. It is an int...

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Problems solved by technology

At present, the existing research work mainly prepares carbon nanotube composite materials in the form of powdered carbon nanotubes filled with polymer materials. Agglomeration, the content of carbon nanotubes is very low, which can only reach a few percent, and the added solvent is also difficult to remove. These not only greatly increase the difficulty of processing, but also the performance of the composite material obtained is very limited.

Recent studies have used nano-carbon paper as a matrix, and impregnated thermoplastic resin into nano-carbon paper by hot pressing method to obtain composite materials with high volume and mass content of carbon nanotubes. However, due to the poor mechanical properties of nano-carbon paper, its strength and The toughness is low, and the advantages of carbon nanotubes as reinforcements cannot be fully utilized

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