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Graphene electrothermal film

A graphene film and graphene technology, which is applied to electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of heating elements without automatic constant temperature and power compensation functions, short service life of electric heating elements, and complex structure of electric heating systems, etc. To achieve the effect of simple and effective design, rapid heat dissipation, and a wide range of raw materials

Active Publication Date: 2014-12-17
ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for nickel-chromium alloys, it is still insufficient in the following aspects: the density of nickel-chromium alloys is greater than 8 g / cm3, and the thickness is several millimeters in use; the resistivity is low (~10–6 Ω / m), and there is still electrothermal conversion The efficiency is low, the heating rate is small, the heating element has no automatic constant temperature and power compensation function, which makes the structure of the electric heating system complex, and the thermal inertia is large. FeCrAl is a ferritic alloy, which is brittle at room temperature, brittle at 475°C and brittle at 1000°C The above high temperature brittleness, the low high temperature strength due to high temperature brittleness eventually leads to short service life of the heating element; the alloy has poor weldability and is difficult to repair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) 1 g of graphene oxide and 5 g of deionized water were mixed, and subjected to ultrasonic treatment at 20° C. at 50 KHz for 10 hours to obtain a graphene oxide solution.

[0032] (2) Extrude the graphene oxide solution in a preparation device with an inline die at an extrusion speed of 10 mL / h, stay in the n-butanol coagulation solution at 80°C for 1 second to solidify to form a film, and obtain Graphene oxide film.

[0033] (3) The graphene oxide film obtained in step (2) is fully reduced in a 20% glucose aqueous solution, washed and dried to obtain the graphene film heating layer 2 . The thickness of the graphene film heating layer 2 is 0.5mm.

[0034] (4) Dissolve polyurethane in tetrahydrofuran (mass fraction is 20%), mix evenly and coat on the upper and lower sides of the graphene film heating layer 2 prepared in step 3, dry at 60°C and place on the top and bottom of the graphene film heating layer 2 An insulating protective layer 1 is formed on both sides, an...

Embodiment 2

[0037] (1) 2 g of graphene, 50 g of N-methylpyrrolidone, and 100 g of pyridine were ultrasonically treated at 20° C. for 2 hours at 50 KHz to obtain a graphene solution.

[0038] (2) Extrude the graphene solution at a speed of 500 mL / h in a preparation device with a straight die, stay in the ethyl acetate coagulation solution at 10°C for 20 seconds to solidify into a film, and obtain graphite after drying Alkene film heating layer 2.

[0039] (3) Dissolve polyimide in tetrahydrofuran (mass fraction is 15%), mix evenly and coat on the upper and lower sides of the graphene film heating layer 2 prepared in step 3, dry at 60°C and place on the graphene film heating layer An insulating protective layer 1 is formed on the upper and lower sides of 2, and the thickness of the upper and lower insulating protective layers 1 is both 1 mm. Finally, a graphene electrothermal film is obtained.

[0040] Performance test: Connect two electrodes on the left and right sides of the graphene fi...

Embodiment 3

[0042] (1) 1g of graphene oxide, 50g of N,N-dimethylformamide, 50g of N,N-dimethylacetamide, and 50g of tetrahydrofuran were ultrasonically treated at 20°C at 50 KHz for 10 hours to obtain a graphene oxide solution.

[0043] (2) Extrude the graphene oxide solution at a speed of 1000 mL / h in a preparation device with a straight die, and place it in a mixed solution of butyl acetate and n-propyl acetate at 60°C (volume ratio 1: 1) stay for 1 second to solidify into a film, and obtain a graphene oxide film after drying.

[0044] (3) The graphene oxide film obtained in step (2) is fully reduced in an aqueous solution of vitamin C with a mass fraction of 50%, washed and dried to obtain a graphene film heating layer 2 . The thickness of the graphene film heating layer 2 is 0.5mm.

[0045] (4) Dissolve ABS resin in tetrahydrofuran (mass fraction is 20%), mix evenly and coat on the upper and lower sides of the graphene film heating layer 2 prepared in step 3, dry at 60°C and place on...

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Abstract

The invention discloses a graphene electrothermal film which comprises a graphene film radiating layer and an insulating protective layer coated on an upper layer and a lower layer of the graphene film radiating layer. The graphene electrothermal film is simple in structure, can be manufactured in a large-area and mass-production manner, is safe in working voltage, high in thermal conversion efficiency, fine in thermal conductivity, quick in response, fine in tenacity, and can be used in different application environments, and temperature can be controlled accurately. The graphene electrothermal film is used for building heat supply, and can meet the demands of safety and comfort and environmental protection and energy saving. The film is used for snow melt of satellite antenna radars and is small in signal shielding function to the antenna radars. The film is used for deicing of planes and aircrafts, and can bend and combine to meet the demands of deicing in different areas.

Description

technical field [0001] The invention relates to a novel electrothermal material, in particular to a graphene electrothermal film. Background technique [0002] Graphene, a two-dimensional crystal material composed of a single carbon atomic layer, is the thinnest known material. It is called a magical material and has set off a research boom all over the world. Graphene has excellent electrical properties (electron mobility at room temperature can reach 2×10 5 cm 2 / Vs), outstanding thermal conductivity (5000 W / (mK), extraordinary specific surface area (2630 m 2 / g), its Young's modulus (1100 GPa) and breaking strength (125 GPa). Andre Geim and Konstantin Novoselov won the 2010 Nobel Prize in Physics for their contributions to graphene research. The excellent electrical and thermal conductivity of graphene completely exceeds that of metals. At the same time, graphene has the advantages of high temperature resistance and corrosion resistance, and its good mechanical prope...

Claims

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Application Information

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IPC IPC(8): H05B3/20
Inventor 高超刘峥夏芝香彭蠡
Owner ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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