Two-dimensional nano carbon heating body, and flexible electric heating module and preparation method therefor

Abstract

The invention discloses a two-dimensional nano carbon heating body, and a flexible electric heating module and a preparation method therefor. The two-dimensional nano carbon heating body comprises at least a membrane-shaped electric heating structure, and at least two flexible electrodes, wherein the membrane-shaped electric heating structure comprises a porous structure mainly formed by multiple layers of two-dimensional carbon nanotube networks, and the porous structure is positioned in a plane corresponding to the membrane-shaped electric heating structure; the conductivity of the membrane-shaped electric heating structure in a chosen direction is higher than the conductivity of the membrane-shaped electric heating structure in other directions different from the chosen direction; the at least two flexible electrodes are arranged at intervals in a set direction, and electrically connected with the membrane-shaped electric heating structure. The two-dimensional nano carbon heating body does not need to be combined with a substrate, so that the two-dimensional nano carbon heating body has the characteristics of lightness, thinness, ventilation and the like, and large-area preparation can be realized; therefore, when the two-dimensional nano carbon heating body is used for preparing the flexible electric heating module, characteristics of convenient cutting and processing, still high electric/thermal conversion efficiency, rapid temperature rise, uniform heating, high radiating efficiency, excellent electric heating stability and the like are achieved; and therefore, the two-dimensional nano carbon heating body is applicable to manufacturing of wearable products.

Description

technical field [0001] The invention relates to an electric heating product, in particular to a two-dimensional nano-carbon heating element, a flexible electric heating module and a preparation method thereof. Background technique [0002] Electric heating materials are materials that use the thermal effect of electric current to generate heat energy, and are widely used in civil and industrial applications. Ordinary electric heating materials can be divided into two types: metal electric heating materials and non-metallic electric heating materials. Metal electric heating materials mainly include noble metals (Pt), high-temperature melting point metals (W, Mo, Ta, Nb) and their alloys, nickel-based alloys and iron-aluminum alloys. Non-metallic electric heating materials mainly include carbon fiber, silicon carbide, lanthanum chromate, zirconia, molybdenum disilicide, etc. Both pure metal electric heaters and non-metallic electric heating materials have some problems. For ...

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Problems solved by technology

The carbon nanotubes in this surface heat source need to be integrated with a substrate of a certain thickness, so on the one hand it may be difficult to meet the requirements of lightness, thinness, and air permeability; on the other hand, it is also difficult to realize a large-area surface heat source. Arbitrary cutting according to the needs of practical applications cannot be used to build soft, light and thin wearable heating products

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