A kind of graphene electrothermal film

A graphene film and graphene technology, applied in 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 wide source of raw materials

Active Publication Date: 2016-01-06
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 8g / cm3, and the thickness is several millimeters when used; the resistivity is low (~10–6Ω / m), and there is still low electrothermal conversion efficiency. , 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 complicated, and the thermal inertia is large; FeCrAl is a ferritic alloy, which has brittleness at room temperature, brittleness at 475°C and brittleness above 1000°C High-temperature brittleness, the low-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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  • A kind of graphene electrothermal film
  • A kind of graphene electrothermal film
  • A kind of graphene electrothermal film

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 50 KHz for 10 hours at 20° C. to obtain a graphene oxide solution.

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

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

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 500mL / 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 graphene after drying 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 film heating...

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 50KHz for 10 hours to obtain a graphene oxide solution.

[0043] (2) Extrude the graphene oxide solution in a preparation device with an inline die at an extrusion speed of 1000mL / h, and place it in a mixed solution of butyl acetate and n-propyl acetate at 60°C (volume ratio 1:1 ) 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 0.5 mm.

[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 plac...

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Abstract

The invention discloses a graphene electrothermal film, which includes a graphene film heating layer and an insulating protective layer coated on the upper and lower sides of the graphene film heating layer. The graphene electrothermal film of the invention has a simple structure and can be prepared in large quantities and in large quantities. The working voltage is safe, the heat conversion efficiency is high, the thermal conductivity is good, the response is fast, the temperature can be precisely controlled, the toughness is good, and it can be used in different application environments. It is used for building heating, which can meet the requirements of safety, comfort, environmental protection and energy saving; it is used for snow melting of satellite antenna radar, and has little shielding effect on the signal of antenna radar; it is used for deicing of aircraft and aircraft, and can be bent and combined according to needs to adapt Deicing requirements for different regions.

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 (5000W / (mK), extraordinary specific surface area (2630m 2 / g), its Young's modulus (1100GPa) and breaking strength (125GPa). 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 properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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