Carbon nanotube/short-fiber composited nano-carbon paper and continuous preparation method thereof

Abstract

The invention provides a kind of carbon nanotube / short-fiber composited nano-carbon paper and a continuous preparation method thereof. The nano-carbon paper mainly comprises disordered carbon nanotubes and short fibers, and is in a non-woven form. The preparation method of the nano-carbon paper comprises the following steps that: the disordered carbon nanotubes are dispersed in a solvent so as to form a dispersion liquid; then, mixing and dispersing the short fibers so as to form a size; preparing an initial film through vacuum assisted flow-casting film-forming; and then, removing polymers in the initial film through subsequent processing so as to obtain a target product. The composited nano-carbon paper disclosed by the invention integrates the huge specific surface areas, superior conductivity and functional characteristics of the carbon nanotubes and the enhancement effect of the short fibers on the strength and flexibility of the carbon paper, therefore, the composited nano-carbon paper is good in self-supporting property and flexibility; meanwhile, through the direct film-forming implemented by using a flow-casting method, the continuous film-forming of the nano-carbon paper is realized, therefore, the nano-carbon paper has the advantages of high efficiency, rapidness and easy large-scale preparation. The composited nano-carbon paper disclosed by the invention has a wide application prospect in the fields of energy electrodes, catalytic carriers, environmental management, static resistance, electromagnetic shielding, wave-absorbing camouflage, and the like.

Description

Technical field [0001] The present invention specially involves a carbon nanotuba / short -fiber composite nano -carbon paper and its continuous preparation method, which belongs to the field of nano -carbon material preparation technology. Background technique [0002] Nano -carbon paper is a non -woven form composed of disorderly carbon nanotubes. It is the simplest macro material form of carbon nanotubes. It has the characteristics of light quality, flexible, conductive, thermal conductivity and huge surface area.Its excellent functional characteristics have important application prospects in the fields of electrode materials, environmental materials, filter materials, catalytic carriers, electronic materials, etc., and are new carbon paper products after traditional carbon fiber paper and graphite paper.Due to the size of the carbon nanopotranskin in nano -scale, traditional carbon paper processing and preparation technology cannot be used to prepare nano -carbon paper. It is u...

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Problems solved by technology

[0007] Among them, the first two methods are limited by equipment, and the preparation efficiency has not been improved, which seriously limits their large-scale production. As for the third method, although it can achieve relatively low cost to prepare nano-carbon paper, but due to the dispersion of carbon nanotubes The process is severely cut off, resulting in the brittleness of the nano-carbon paper obtained by filtration, which makes it difficult to prepare large-sized products. At the same time, the nano-scale carbon nanotubes make the efficiency of the filtration process very low. Continuous and high-efficiency preparation must be solved, so also very difficult to achieve

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