Flexible conductive heat-generating carbon-based flame-retardant composite fabric and preparation method thereof

Abstract

The invention discloses a flexible conductive heat-generating carbon-based flame-retardant composite fabric and a preparation method thereof and belongs to the technical field of preparation of conductive materials. The method comprises the following steps that a carbon fiber original filament is woven into a carbon fiber original filament fabric; the carbon fiber original filament fabric is sequentially subjected to pad-drying treatment, pre-oxidation treatment, oxygen-free low-temperature carbonization and oxygen-free high-temperature carbonization to prepare a carbon fiber flame-retardant fabric; the carbon fiber flame-retardant fabric is immersed in a graphene/carbon nanotube mixture liquid and then subjected to high-temperature and high-pressure padding and drying treatment to obtain the composite fabric. By placing graphene and carbon nanotubes in an organic solvent for mixing separately, the carbon nanotubes can be well dispersed in a graphene-based body without surface modification or modification of the carbon nanotubes, the conductivity of the heat-generating composite carbon fiber is greatly enhanced, and favorable conditions are provided for further application of the flexible conductive heat-generating carbon-based flame-retardant fabric.

Description

technical field [0001] The invention belongs to the technical field of preparation of conductive and flame-resistant materials, and in particular relates to a flexible conductive and heating carbon-based flame-retardant composite fabric and a preparation method thereof. Background technique [0002] At present, there are mainly two types of common electric heating materials. One is alloy electric heating materials, which are mainly made of metal alloy materials such as copper and nickel. Due to its long development time, mature and stable technology, and low cost, alloy electric heating materials have a large market share, but they are not as soft as fabrics, and there are certain restrictions in the use process. Electrothermal materials are subject to corrosion, aging, and polarity weakening. At the same time, their driving voltage is usually high, which will generate open flames and pose a certain safety hazard. The other type is carbon electrothermal materials. As a new ...

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Problems solved by technology

Among them, carbon nanotubes are a new type of carbon material formed by carbon-carbon covalent bonds. Structure; the characteristics of small diameter and large aspect ratio of carbon nanotubes make them have excellent electrothermal properties and good mechanical properties like graphene, and the Young's modulus and shear modulus of carbon nanotubes are the same as diamond , the theoretical strength can reach 1.06TPa, which is 100 times that of ordinary steel; carbon nanotubes have high toughness, but the density is only 1 / 7 of steel; carbon nanotubes are also resistant to strong acids and alkalis, and are used for flexible electric heating The preparation of the material also has good stability, but the high cost and extremely low production rate of pure graphene and carbon nanotubes limit their large-scale use

There are two main types of carbon fiber electric heating materials, one is carbon fiber cloth woven from prepreg carbon fiber, this kind of material is impregnated with epoxy resin and other substances on the carbon fiber, which greatly affects the electrothermal conversion rate of its carbon fiber, and It is easy to burn; the other is carbon fiber felt. Carbon fiber felt is made of chopped carbon fiber and adhesive, which is laid, pressed, and bonded. It is not soft enough, and is affected by the adhesive. Decreased electrothermal conversion rate

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