Preparation method of efficient pressure-sensitive electro-thermal material based on graphene
An electrothermal material and graphene technology, applied in graphene, heating element materials, electrothermal devices, etc., can solve few problems and achieve the effects of fast electrothermal response, excellent performance, and simple preparation process
Active Publication Date: 2016-06-29
ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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Problems solved by technology
At present, there are few studies on the application of graphene three-dimensional materials in the field of electrothermal
Method used
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Embodiment 1
[0012] Embodiment 1: the density is 5mg / cm 3 , the graphene airgel with a pore size of 150 μm is placed in an inert atmosphere for high-temperature heat treatment according to the methods shown in Table 1 to Table 3. After natural cooling, a high-efficiency piezo-sensitive electrothermal material based on graphene can be obtained. The electrothermal effect is shown in the table 1 ~ Table 3.
[0013] Table 1
[0014]
[0015] Table 2
[0016]
[0017] table 3
[0018]
[0019] It can be seen from Table 1 to Table 3 that the performance of this material is mainly determined by two aspects. One is the repair of the graphene oxide sheet structure inside the material, that is, the loss of functional groups and the repair of the carbon conjugated structure at high temperature. Second, the continuity of the three-dimensional orientation structure inside the material, that is, the connectivity of the internal lamellar structure. Both work together to increase the performa...
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Abstract
The invention discloses a preparation method of efficient pressure-sensitive electro-thermal material based on graphene. The method includes: heating graphene aerogel to 500-800 DEG C at the speed of 0.1-1 DEG C / minute, and keeping the temperature for 0.5-2 hours; heating to 1000-1300 DEG C at the speed of 1-3 DEG C / minute, and keeping the temperature for 0.5-3 hours; heating to 2000-3000 DEG C at the speed of 5-8 DEG C / minute, and keeping the temperature for 0.5-4 hours to obtain the efficient pressure-sensitive electro-thermal material based on the graphene. The density of the efficient pressure-sensitive electro-thermal material is 0.16-15mg / m<3>, the pore size of the efficient pressure-sensitive electro-thermal material is 50-200 micrometers, the efficient pressure-sensitive electro-thermal material can generate fast electric thermal response under different strain, the larger the stress is, the higher the electro-thermal response saturation temperature is, and the highest temperature variation range ranges from 60 DEG C to 420 DEG C. The preparation method has the advantages that the method is simple in process, low in energy consumption and capable of achieving large-scale production, and the prepared efficient pressure-sensitive electro-thermal material based on the graphene is excellent in performance.
Description
technical field [0001] The invention relates to a preparation method of a graphene-based high-efficiency pressure-sensitive electrothermal material. Background technique [0002] Graphene is a two-dimensional material with excellent performance. In 2004, Professors Andre Jim and Konstantin Novoselov of the University of Manchester were awarded the 2010 Nobel Prize in Physics for their creative discovery of graphene two-dimensional materials. Award, since then created a worldwide research upsurge in graphene materials. Graphene is currently the most ideal two-dimensional nanomaterial, with ultra-high specific surface area and excellent electrical and thermal conductivity. Graphene macroscopic film materials are often used in macroscopic electrothermal materials, and are used for deicing and defogging of transparent and flexible electrothermal films. Compared with commercial electrothermal materials, graphene materials have the advantages of light weight, simple preparation ...
Claims
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IPC IPC(8): C01B31/04H05B3/14
CPCC01B2204/22C01P2006/16H05B3/145Y02P20/10
Inventor 高超王冉孙海燕杨清
Owner ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH