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A kind of heating layer of flexible electric heating film and its preparation method

An electric heating film and heating layer technology, applied in the direction of electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of easy falling off of fillers, poor bending resistance, poor interface bonding, etc., achieve uniform filling, overcome local overheating, avoid agglomeration effects

Active Publication Date: 2021-07-13
SHENZHEN DELONG ELECTRICAL APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In order to overcome the defects of the electric heating film heating layer in the above-mentioned prior art, an object of the present invention is to provide a flexible electric heating film heating layer containing a composite polymer conductive The heating layer of the heating film has problems such as poor interface bonding, poor bending resistance, easy falling off of fillers, and non-adjustable amount of heating layer materials.

Method used

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  • A kind of heating layer of flexible electric heating film and its preparation method

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Embodiment 1

[0091] Preparation of Composite Polymer Conductive Skeleton Material 1

[0092] 1) Add 2g of graphene composite nanomaterials loaded with 12wt% silver and 1.2g of carbon nanotubes into 200ml of 0.5wt% N-methylpyrrolidone aqueous solution under ice bath conditions, mechanically stir evenly; add 0.4g of polyethylene Alcohol powder into solution, after stirring, ultrasonically disperse for 5 minutes, and mix evenly to obtain nanomaterial dispersion.

[0093] 2) Under ice bath and nitrogen inert atmosphere, add 100g of acrylamide powder to the above nanomaterial dispersion, then add 0.5g of nanocellulose whiskers (about 100μm in length) and 6g of sodium hydroxide and stir for 15min; under stirring conditions, Then add 1.5g of methinebisacrylamide crosslinking agent, 0.9g of lauryl methacrylate, 0.1g of tetramethylethylenediamine catalyst, and then slowly add dropwise a solution containing 1.2g of ammonium persulfate, and continue to The reaction was stirred for 2h. The obtained ...

Embodiment 2

[0097] Preparation of Composite Polymer Conductive Framework Material 2

[0098] 1) Under ice bath conditions, add 1.8g of graphene composite nanomaterials containing 15wt% alumina and 1g of carbon nanotubes into 190ml of 0.5wt% N-methylpyrrolidone aqueous solution, and stir evenly; add 0.3g of polyethylene Alcohol powder into solution, after stirring, ultrasonically disperse for 5 minutes, and mix evenly to obtain nanomaterial dispersion.

[0099] 2) Add 80g of acrylamide powder to the above nanomaterial dispersion in an ice bath and nitrogen inert atmosphere, then add 0.5g of nanocellulose whiskers (about 50μm in length) and 5g of sodium hydroxide and stir for 15min; under stirring conditions, Then add 1.2g of methinebisacrylamide crosslinking agent, 0.8g of methacrylic acid, 0.1g of tetramethylethylenediamine catalyst, and then slowly dropwise add an aqueous solution containing 1g of potassium persulfate, and continue to stir for 2 hours after the dropwise addition . The ...

Embodiment 3

[0102] Preparation of electrothermal paste

[0103] 1) Add an equal volume of 15wt% sodium persulfate aqueous solution to 50ml of 5wt% pyrrole solution under ice bath conditions, stir slightly, then add 12.5g conductive carbon black powder (particle size about 5μm), stir and react under ice bath conditions 6h, after the reaction, let it stand for 12h; centrifuge to obtain black carbon black-doped polypyrrole nanoparticles, and disperse it in 30g of 30wt% graphite aqueous dispersion to obtain carbon black-doped polypyrrole particles / graphite dispersion.

[0104] 2) Mix the emulsion type polydimethylsiloxane and benzoyl peroxide at a mass ratio of 100:0.5 at room temperature, stir magnetically for 15 minutes, and let it stand for 2 hours to obtain a transparent polydimethylsiloxane polymer sol About 50g;

[0105] Add 10g of polyvinylidene fluoride resin powder into 90g of N,N-dimethylacetamide solution, and form PVDF resin glue by stirring under heating conditions.

[0106] 3)...

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Abstract

The invention discloses a flexible electric heating film heating layer containing a composite polymer conductive skeleton material and a preparation method thereof. The flexible electric heating film heating layer is impregnated with a composite high molecular polymer conductive skeleton material in an electric heating slurry, After curing, it is obtained by heat-pressing treatment. Wherein, the composite high molecular polymer conductive skeleton material is a flexible porous material with a continuous three-dimensional porous structure; it includes a first high molecular polymer, a conductive second high molecular polymer (high molecular conductive polymer) and doped Graphene-based composite nanosheet materials and carbon nanotubes. The invention prepares the heating layer of the flexible heating film, which can overcome the problems existing in the prior art, such as poor interface bonding of the electric heating layer, poor bending resistance, easy falling off of fillers, and non-adjustable dosage of heating layer materials.

Description

technical field [0001] The invention relates to a flexible electric heating film, in particular to a flexible composite electric heating film heating layer and a preparation method thereof. It belongs to the field of electric heating film materials. Background technique [0002] With the development of intelligent technology, electrothermal materials have been widely used in various fields. In daily life, low-temperature and low-pressure flexible electric heating film is becoming more and more popular as an emerging product in the market. For example, it is widely used in textile materials, and products such as electric heating gloves and electric heating vests have been developed. The flexible electrothermal film is soft and thin, has good tensile strength, good folding resistance, and wide range of operating voltage. It can be used in many aspects of daily life when used for low-temperature heating. For example, the electrothermal film obtained by placing metal heating e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/14H05B3/12H05B3/34
CPCH05B3/12H05B3/146H05B3/34
Inventor 刘书田冯瑞聪
Owner SHENZHEN DELONG ELECTRICAL APPLIANCE CO LTD
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