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A thermistor based on three-dimensional network graphene and its application

A thermistor, three-dimensional mesh technology, applied in resistors, resistors with positive temperature coefficients, non-adjustable metal resistors, etc., can solve the problem of reduced PTC sensitivity and cyclability, and easy entanglement of carbon nanotubes. , PTC poor conductivity and other problems, to achieve the effect of shortening the action time, increasing the sensitivity, and no residual pressure

Active Publication Date: 2018-08-31
ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon black can increase the thermal stability of the thermistor, but the conductivity of PTC is poor due to the small amount of carbon black, and the sensitivity and cycle performance of PTC are reduced due to too much carbon black; although carbon nanotubes can shorten the action time , making it more sensitive to temperature, but the carbon nanotubes are easy to entangle with each other, and the conductive network formed when the matrix is ​​heated and expanded is not easy to break, so the PTC strength of the composite material is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation method based on the thermistor of three-dimensional network graphene on the household appliance heater, comprises the following steps:

[0021] (1) Using 50 parts of methane as a raw material, deposit graphene on the surface of nickel foam by chemical vapor deposition, then place it in dilute hydrochloric acid, soak for 1 to 2 hours, and remove the simple nickel to obtain three-dimensional nickel foam. The temperature of vapor deposition is 900-1000℃, the pressure is 500-2000Pa, and the carrier gas is hydrogen;

[0022] (2) After mixing 100 parts of polytetrafluoroethylene powder and 42 parts of methacrylic resin evenly, add 150 parts of propylene glycol methyl ether acetate for stirring and ultrasonication until completely dissolved, then heat and reflux for 20 to 30 minutes, and add 0.3 parts of dimethicone Joint agent, 0.3 part of flame retardant, 0.2 part of antioxidant, 0.1 part of lubricant, 0.1 part of anti-ultraviolet agent ball mill for 15...

Embodiment 2

[0025] A kind of preparation method based on the thermistor of three-dimensional network graphene on the household appliance heater, comprises the following steps:

[0026] (1) Using 30 parts of methane as a raw material, deposit graphene on the surface of nickel foam by chemical vapor deposition, then place it in dilute hydrochloric acid, soak for 1 to 2 hours, and remove the simple nickel to obtain three-dimensional nickel foam. The temperature of vapor deposition is 900-1000℃, the pressure is 500-2000Pa, and the carrier gas is hydrogen;

[0027] (2) After mixing 80 parts of polytetrafluoroethylene powder and 40 parts of methacrylic resin evenly, add 80 parts of ethylene glycol ether acetate and 40 parts of toluene to the mixed solution for stirring and ultrasonic until completely dissolved, and then heat Reflux for 20-30 minutes, add 0.3 part of coupling agent, 0.1 part of flame retardant, 0.5 part of antioxidant, 0.1 part of lubricant, 0.1 part of anti-ultraviolet agent, b...

Embodiment 3

[0030] A kind of preparation method based on the thermistor of three-dimensional network graphene on the household appliance heater, comprises the following steps:

[0031] (1) Using 60 parts of acetylene as a raw material, deposit graphene on the surface of nickel foam by chemical vapor deposition, then place it in dilute hydrochloric acid, soak for 1 to 2 hours, and remove the simple nickel to obtain three-dimensional nickel foam. The temperature of vapor deposition is 900-1000℃, the pressure is 500-2000Pa, and the carrier gas is hydrogen;

[0032](2) After mixing 100 parts of polytetrafluoroethylene powder and 62 parts of methacrylic resin evenly, add 100 parts of N,N dimethylpyrrolidone and 80 parts of pyridine to the mixed solution for stirring and ultrasonication until completely dissolved, and then Heat and reflux for 20-30 minutes, add 0.3 part of coupling agent, 0.2 part of flame retardant, 0.3 part of antioxidant, 0.30.3 part of lubricant, part of anti-ultraviolet ag...

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PUM

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Abstract

The invention discloses a three-dimensional meshed graphene based thermistor and application thereof, and relates to the technical field of a graphene-based thermistor and application thereof. The three-dimensional meshed graphene based thermistor comprises hydrocarbon gas, polytetrafluoroethylene, methacrylic resin, an organic solvent, a coupling agent, a flame retardant, an anti-oxidant, a lubricant and an anti-ultraviolet agent. Three-dimensional graphene has favorable electrical and heat conductivity; due to a continuous framework network structure, the three-dimensional graphene also has electrical conduction uniformity and heat conduction uniformity, and excessive large or excessive small resistance of a certain part is prevented to cause heat accumulation caused by non-uniform electrical conduction and non-uniform heat conduction; and moreover, due to a spherical structure of the thermistor, the action time of the thermistor is obviously reduced, the sensitivity is remarkably improved, and the thermistor has no residual voltage, is high in safety and has wide application prospect in a heater of household appliance.

Description

technical field [0001] The invention relates to the technical field of a graphene-based thermistor and its application, in particular to a three-dimensional network graphene-based thermistor and its application. Background technique [0002] PTC material is a positive temperature coefficient heat-sensitive material, which has the characteristic that the resistivity increases with the increase of temperature. The resistivity of the material remains basically unchanged before the critical transition temperature, and when the temperature reaches a certain temperature, that is, the Curie temperature, the resistivity will increase rapidly within a narrow temperature range of a few degrees or more than ten degrees. 3 ~10 9 Magnitude. [0003] At present, the PTC materials used are mainly divided into BaTiO 3 , V 2 o 3 Mainly ceramic-based PTC materials and polymer-based PTC materials composed of polymers and conductive materials. Ceramic-based PTC materials are mainly compos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02H05B3/14
CPCH01C7/027H05B3/14H05B2203/017
Inventor 汪洋陈启志危国慧权惠玲
Owner ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES