Preparation method of carbon nano tube/polyaniline nano composite conductive powder

Abstract

The invention discloses a preparation method of carbon nano tube / polyaniline nano composite conductive powder. The method comprises the following steps: mixing a carbon nano tube, aniline and protonic acid, and adding an assistant stabilizing agent into the mixture to obtain an oil phase solution; mixing an emulsifier with water to obtain an aqueous phase solution; mixing the oil phase solution and the water phase solution and then carrying out homogenization on the mixture in ultrasonic wave to obtain a miniemulsion; adding the protonic acid solution into the miniemulsion and then stirring to obtain a doping solution; dropwise adding an oxidant aqueous solution into the doping solution and carrying out a reaction for at least 4 hours to obtain the reaction solution; and finally carrying out centrifugalization to obtain a precipitate, washing the precipitate with ethanol and water, and drying the precipitate after washing to obtain carbon nano tube / polyaniline nano composite conductive powder, wherein the core is the carbon nano tube and a shell is polyaniline, and the thickness of polyaniline is 10-30nm. The product prepared by the method can be used as a conductive material or an enhanced filling material to be added into the polymer matrix, so as to prepare the new materials for light-to-electricity conversion, photoelectrocatalysis and electromagnetic shielding and the like.

Description

technical field [0001] The invention relates to a preparation method of composite conductive powder, in particular to a preparation method of carbon nanotube / polyaniline nanocomposite conductive powder. Background technique [0002] Since the excellent electrochemical properties of carbon nanotubes were discovered, they have acted as filler materials, which greatly improved the electrical conductivity, mechanical properties and stability of composite materials. The many excellent properties of carbon nanotubes make them play various roles in composite materials: super mechanical properties can greatly improve the strength and toughness of composite materials; unique electrical and photoelectric properties can improve the electrical conductivity of polymer materials And the preparation of new photoelectric polymer composites; its unique structure can prepare one-dimensional nanocomposites filled with metal or metal oxides. However, there is a strong van der Waals force betwe...

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Problems solved by technology

But this preparation method has weak point, at first, the consumption of emulsifier dodecylbenzene sulfonic acid as one of raw material is bigger, reaches 10-3 mole, and the price of this raw material is expensive, up to 600 yuan / kg, which makes it difficult to reduce the cost of preparation; secondly, the reaction temperature is relatively low and needs to be reacted at 0°C, which increases the difficulty and cost of preparation; finally, the preparation process takes too long and requires stirring for 3 hour, in order to obtain the mixed solution, ultrasonic dispersion is required for 1 hour, and during the reaction, it takes another 6 hours to obtain the reaction system; the above-mentioned deficiencies are not conducive to its industrialized large-scale production

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