Graphene-based self-temperature-limiting electrothermal slurry and preparation method and application in electric heating floor system thereof

A graphene-based, electric heating floor technology, applied in electric heating systems, heating systems, applications, etc., can solve the problem that the coating range is limited to one side of the base material, the heat conduction function is not fully utilized, and the heat cannot be transferred to the floor. Surface and other problems, to achieve the effects of excellent mechanical properties, good electrical conductivity and long service life

Inactive Publication Date: 2019-04-05
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Existing graphene or graphite electrothermal paste and its electrothermal application, such as Chinese patents CN 205279216 U, CN107178819 A, CN 107882294 A, etc., although graphene is used to coat the base material as an electrothermal application, its coating range is only Limited to one side of the substrate material, only using graphene’s resistance heating function, failing to make full use of the excellent heat transfer properties of graphene to transfer the heat from one side of the substrate to the other side through the coating of graphene on the surrounding surface. Graphene’s excellent The heat conduction function is not fully utilized, resulting in a considerable part of the heat not being transferred to the floor surface and being wasted

Method used

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  • Graphene-based self-temperature-limiting electrothermal slurry and preparation method and application in electric heating floor system thereof
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Effect test

Embodiment 1

[0065] Graphene materials were prepared by electrochemically swelling graphite electrodes. The thickness of graphene is 1-3 nm, the lateral dimension is about 10-20 μm, and the crystal structure is complete. See the attached figure 1 a, 1b, graphene microsheets are soft, transparent, well maintained in crystal form, and have excellent electrical and thermal transport properties.

[0066] Take 1 mass part of graphene powder and disperse it in 10 mass parts of water, mechanically stir to form a dispersion, add 10 mass parts of water-based acrylic resin emulsion (resin), 0.2 mass parts of carbon nanotubes, 0.3 mass parts of conductive carbon black, 1 mass part Barium carbonate-based ceramic PTC powder (self-limiting temperature filler), 0.1 mass part of titanium dioxide (functional filler), 0.1 mass part of sodium dodecylbenzenesulfonate (dispersant), 0.05 mass part of polyether modified polydisiloxane Alkane (defoaming and leveling agent), sand milled after stirring for 1 hour, ...

Embodiment 2

[0069] Graphene powder materials are prepared by electrochemically swelling graphite electrodes. The thickness of graphene is 3-5 nm, the lateral dimension is about 30-50 μm, the crystal structure is complete, the graphene microsheets are soft, transparent, and the crystal form is well maintained.

[0070] Take 10 parts by mass of graphene powder and disperse it in 200 parts by mass of water, mechanically stir to form a dispersion, add 50 parts by mass of water-based acrylic resin emulsion (resin), 2 parts by mass of carbon nanotubes, 3 parts by mass of conductive carbon black, 10 parts by mass of Barium carbonate-based ceramic PTC powder (self-limiting temperature filler), 5 parts by mass of non-photocatalyst (functional filler), 0.3 parts by mass of sodium dodecylbenzenesulfonate (dispersant), 0.2 parts by mass of polyether-modified polydisilicate Oxane (defoaming and leveling agent), sand milled after stirring for 3 hours, and finally sieved with 400 mesh to obtain a homogen...

Embodiment 3

[0073] Graphene powder materials are prepared by electrochemically swelling graphite electrodes. The thickness of graphene is 1-5 nm, the lateral size is about 50-100 μm, the crystal structure is complete, the graphene microsheets are soft, transparent, and the crystal form is well maintained.

[0074] Take 20 parts by mass of graphene powder and ultrasonically disperse it in 500 parts by mass of ethanol to form a dispersion, add 50 parts by mass of water-based polyurethane resin emulsion (resin), 3 parts by mass of carbon nanotubes, 5 parts by mass of conductive carbon black, and 20 parts by mass of Barium carbonate-based ceramic PTC powder (self-limiting temperature filler), 1 mass part of magnesium hydroxide (functional filler), 0.5 mass part of sodium dodecylbenzenesulfonate (dispersant), 0.5 mass part of polyether modified poly Siloxane (defoaming and leveling agent), sand milled after stirring for 3 hours, and finally sieved to 300 mesh to obtain a homogeneous graphene el...

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Abstract

The invention discloses a graphene-based self-temperature-limiting electrothermal slurry and a preparation method and application in electric heating floor system thereof. The electrothermal slurry isprepared by mixing a graphene dispersion liquid, resin, an electrothermal filler, a PTC self-temperature-limiting filler, a formaldehyde-removing functional filler and various additives to prepare ahomogeneous graphene electrothermal multifunctional slurry. After treatment is carried out on the surfaces of a wood substrate, a pure graphene slurry is coated on the substrate to improve the thermalconductivity of each surface of the substrate; the electrothermal multifunctional slurry is combined with the treated substrate; and after drying, conductive circuits, a protective layer, a thermal insulation layer and a temperature control system are laid. . The invention has the advantages of self-temperature-limiting of a heat-generating layer, a formaldehyde removing function, high thermal conductivity of the substrate, a simple manufacturing process, being environment-friendly, suitability for large-scale production, etc.

Description

technical field [0001] The invention relates to a graphene-based self-limiting temperature electric heating slurry, a preparation method thereof and an application in an electric heating floor system, belonging to the field of electric heating materials and applications. Background technique [0002] Environmental pollution issues such as "smog" have attracted the attention of the whole society. Air pollution caused by traditional coal burning has also become one of the main risk factors affecting public health in China, causing hundreds of billions of health and economic losses and disease burdens to my country every year. . my country is the second largest electricity consumer in the world, with the largest installed capacity in the world. Promoting the use of electric heating instead of coal-fired heating can reduce pollutant emissions. The electric heating floor is a composite floor that can generate heat after being energized. It is made of conductive special electric ...

Claims

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Application Information

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IPC IPC(8): H05B3/14H05B3/20F24D13/02
CPCF24D13/024H05B3/145H05B3/20H05B2203/017
Inventor 王俊中王聪伟刘欣田
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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