High-elastic flame-retardant conductive fiber and preparation method thereof

Abstract

The invention discloses a high-elastic flame-retardant conductive fiber which comprises the following components in parts by mass: 5 to 20 parts of 5-percent aqueous graphene dispersion liquid; 40 to 60 parts of a 5-percent aqueous carbon nanotube dispersion liquid; 10 to 30 parts of a water-based flexible resin adhesive; 1 to 5 parts of a flame retardant; 0.01 to 1 part of a defoaming agent; 1 to 5 parts of a dispersant; 0.1 to 1.5 parts of a wetting agent; and 0.1 to 5 parts of thickener. The invention further discloses a preparation method of the high-elastic flame-retardant conductive fiber. The preparation method is suitable for the technical field of preparation of the conductive fiber, the process is simple, the adhesive force can be improved, and the softness of the original fiber can be kept; the adhesive force and the wear resistance of the conductive fiber can also be improved; meanwhile, the conductivity of the conductive fiber is improved, and a series of carbon nanotube/graphene composite conductive fibers with high elasticity, uniform and stable resistance and high adhesive force are prepared; and the conductive fiber prepared by the method has the advantages of environmental friendliness, simplicity in operation, low price and stable and controllable product quality, and the product has a better application value in the aspects of electric heating, static prevention, electromagnetic shielding, biosensors, battery electrodes and the like.

Description

technical field [0001] The invention belongs to the technical field of conductive fiber preparation, in particular to a high-elasticity flame-retardant conductive fiber and a preparation method thereof. Background technique [0002] The conductive fibers used in traditional electric heating fabrics are mainly metals, metal compound fibers, carbon fibers, organic conductive fibers, etc. Metals, metal compound fibers, and carbon fibers generally have the disadvantages of hard fibers, inelasticity, and poor comfort. Organic conductive fibers are relatively soft and have high elasticity, but their conductivity, resistance uniformity and stability are relatively poor, and their rubbing resistance is poor. At the same time, traditional electric heating fabrics do not have flame retardant properties. When preparing conductive heating elements, they often need to be covered with insulating films, and the power temperature of heating is adjusted through external control. There is a d...

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Problems solved by technology

[0003] At present, there are two common methods for preparing high-elastic conductive fibers. One is to directly mix and spin conductive materials and high-elastic polymer slices, but the prepared conductive fibers have poor resistance uniformity, complicated process and relatively high cost.

[0004] The second is to prepare rigid conductive fibers by coating method, and then combine rigid conductive high-performance fibers with flexible rubber through composite weaving. The process is relatively complicated and the conductivity is limited.

[0005] In CNIO838537OA, polyurethane is impregnated with carbon nanotube dispersion liquid and other processes, and conductive substances are doped into the surface of chemically synthesized fibers to obtain carbon nanotube polyurethane elastic conductive fibers. Although the conductivity and strength have been improved to a certain extent, they have basically lost The elasticity of the fiber itself cannot guarantee electrical conductivity and resistance stability under deformation

[0006] In CN107904734B, the fiber material is first prepared in the way of coating-swelling-reduction, and then, the rigid conductive high-performance fiber and flexible rubber are combined by composite weaving to form a composite braid with uniform structure and high stability , but the process is relatively complicated, the fiber is thicker, and the application is limited

[0007] CN111287003ACN111287003A adopts a simple dyeing process and improves the safety of the fiber in application by adding PTC functional components, but does not fundamentally solve the problem of the conductivity of the fiber itself and the uniformity of resistance, and the prepared conductive fiber has no elasticity, and the application is limited

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