Super-stretchable graphene electro-thermal film and preparation method thereof

A graphene film and graphene technology, applied in electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of complex processing technology, high thermal response temperature, and high cost, and achieve wide availability of raw materials, simple preparation technology, and high cost. Size controllable effect

Active Publication Date: 2016-06-08
杭州德烯科技集团有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Traditional electrothermal materials such as nickel-chromium alloys have disadvantages such as high cost, high density, heavy mass, and complicated processing technology. They cannot be stretched during use, while graphene fibers have good flexibility, fast heating rate, and high thermal response temperature. They can be used Suitable for substrates of various shapes, and super stretchable, can adapt to human activities such as muscle stretching, etc., and is expected to replace traditional electrothermal materials for wide application

Method used

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  • Super-stretchable graphene electro-thermal film and preparation method thereof
  • Super-stretchable graphene electro-thermal film and preparation method thereof
  • Super-stretchable graphene electro-thermal film and preparation method thereof

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preparation example Construction

[0021] A kind of super stretchable highly conductive graphene fiber of the present invention and preparation method thereof, the steps are as follows:

[0022] (1) Graphene oxide is obtained by the natural graphite chemical oxidation exfoliation method, configured into a graphene oxide aqueous solution, and a graphene oxide film with a thickness of 0.5-50 μm is prepared;

[0023] (2) Heat up to 500-800°C at a rate of 0.1-1°C / min, hold for 0.5-2h, then heat up to 1000-1300°C at a rate of 1-3°C / min, hold for 0.5-3h, and then heat for 5- Heat up to 2000-3000°C at a rate of 8°C / min, and hold for 0.5-4h;

[0024] (3) The graphene film after the heat treatment in step 3 is cut into graphene strips, one end of the graphene strips is fixed, and the other end is connected to a rotor with a rotating speed of 250-300 rpm (one end is fixed, and the other end is continuously driven by the rotor) Turn, similar to rubbing hemp rope, such as figure 1 shown), after winding in the radial dire...

Embodiment 1

[0030] Embodiment 1: the preparation method of a kind of super stretchable highly conductive graphene fiber of the present invention, the steps are as follows:

[0031] (1) Graphene oxide is obtained by natural graphite chemical oxidation exfoliation method, and a graphene oxide film with a thickness of 0.8-50 μm is prepared;

[0032] (2) Heat-treat the graphene oxide film with a thickness of 0.8-50 μm prepared in step 1 according to the methods shown in Table 1-Table 3 to obtain a graphene film.

[0033] (3) The graphene film processed in step 2 is cut into graphene strips, one end of the graphene strip is fixed, the other end is connected to a rotor with a rotating speed of 260 rpm, and after radial winding for 3min (one end is fixed, the other is fixed) One end is constantly rotating under the drive of the rotor, similar to rubbing hemp rope, such as figure 2 Shown), the electrical properties of each product obtained by different heat treatment methods are shown in Tables...

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Abstract

The invention discloses a super-stretchable graphene electro-thermal film and a preparation method thereof. The electro-thermal film is formed through knitting graphene fibers with a spiral structure; the fibers not only have ultrahigh elongation at break, and can realize rapid response on a high temperature of 30-420 DEG C under safety voltage of 0.5-5V. The preparation method is simple and specifically comprises the following steps: after chemically reducing graphene oxide, carrying out heat treatment in a high-temperature furnace at 500-3000 DEG C to obtain a graphene film; after uniformly winding, obtaining graphene fibers; and knitting the graphene fibers to obtain the graphene electro-thermal film. The graphene electro-thermal film has ultrahigh heating speed and cooling speed, and ultrahigh temperature response; the working voltage is relatively low so that the graphene electro-thermal film can be used for human bodies and is used as human body heating cloth; and the graphene electro-thermal film has a stretchable property so that the graphene electro-thermal film can be adaptive to the movement of the human bodies, such as muscle stretching, in a utilization process, and furthermore, the graphene electro-thermal film can be widely applied as an intelligent electro-thermal material.

Description

technical field [0001] The invention relates to a super stretchable graphene electrothermal film and a preparation method thereof. Background technique [0002] Graphene materials have caused extensive research by scientists all over the world. In 2004, Professors Andre Jim and Konstantin Novoselov of the University of Manchester won the 2010 Nobel Prize for their pioneering experiments on two-dimensional graphene materials. Bell Prize in Physics. Graphene exhibits rich chemical properties, and can be modified by different chemical reactions to obtain a series of chemical derivatives. Graphene has high fracture strength and Young's modulus, and has excellent electrical properties. Graphene materials are also excellent thermal and electrocaloric materials. Traditional electrothermal materials such as nickel-chromium alloys have disadvantages such as high cost, high density, heavy mass, and complicated processing technology. They cannot be stretched during use, while graphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/34H05B3/14D01F9/12
CPCD01F9/12H05B3/14H05B3/34
Inventor 高超王冉刘英军赵晓莉
Owner 杭州德烯科技集团有限公司
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