Electric heating fabric with pressure sensitive characteristic, preparation method of electric heating fabric, electric blanket and sitting and bedding

Abstract

The invention discloses an electric heating fabric with a pressure sensitive characteristic, a preparation method of the electric heating fabric, and an electric blanket and a bedding made of the fabric with the pressure sensitive characteristic. The electric heating fabric with the pressure sensitive characteristic comprises a fabric layer and an electric heating film, the electrothermal film is provided with a lower protection layer, a heating layer, an upper protection layer, an electrode attached to the heating layer and a lead-out wire. The heating layer is prepared from the following components: 95 to 98 weight percent of polyurethane resin, 2 to 5 weight percent of graphene and 0.01 to 0.5 weight percent of black phosphorus/metal oxide nano composite material. The polyurethane film is filled with the graphene filler which is slightly lower than the conductive percolation threshold range of the polyurethane film, and a small amount of black phosphorus/metal oxide nano composite material is added to enhance the pressure sensitive characteristic of the film. After the electric heating film of the electric heating fabric is connected with a power supply, when no external pressure exists, the resistance of the heating layer is large, and the heating layer does not emit heat; when the outside endows the electrothermal film with certain pressure, the electrothermal film begins to heat, and after the external force disappears, the heating layer restores to the original shape and stops heating.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to an electric heating fabric with pressure-sensitive properties, a preparation method thereof, as well as an electric heating blanket and a sitting-bedding device with the fabric with pressure-sensitive properties. Background technique [0002] Black phosphorus is an inorganic semiconductor material with a layer-stacked honeycomb structure. It is a direct bandgap P-type semiconductor with a band gap value of 0.33-0.39 eV. Few-layer black phosphorus has a current switching ratio of 103-105. Studies have shown that applying compressive stress in the direction perpendicular to the phosphorene plane can lead to the transformation of phosphorene from a direct bandgap semiconductor to an indirect bandgap semiconductor, and the strain along the normal direction of phosphorene can reduce its bandgap width, realizing semiconductor to The transformation of the physical properties of meta...

AI Technical Summary

Problems solved by technology

But at present, the electric heating film on the market is the overall heating controlled by the switch. After the switch is turned on, the entire heating surface of the electric heating film starts to generate heat. The human body is wasted in the form of heat radiation, which leads to increased energy consumption. Especially, electric heating films such as cushions and mattresses have a large number of areas that are not in contact with the human body, and more heat is wasted.

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