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Method for improving electrothermal performance of electrothermal film by using intercalation bridging method and application

An electric heating film and electric heating technology, applied in applications, electric heating devices, ohmic resistance heating, etc., can solve problems affecting applications, graphene oxide sheet diameter is difficult to control, etc., to simplify production steps, excellent practical performance, and solve filler dispersion The effect of uniformity

Active Publication Date: 2022-05-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process, the sheet size of graphene oxide is difficult to control, which affects its application in actual production, and the influence of graphene sheet size on rheological properties is still limited.

Method used

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  • Method for improving electrothermal performance of electrothermal film by using intercalation bridging method and application
  • Method for improving electrothermal performance of electrothermal film by using intercalation bridging method and application
  • Method for improving electrothermal performance of electrothermal film by using intercalation bridging method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In terms of parts by mass, 6 parts of graphite nanosheets, 19 parts of 100nm ultrafine carbon powder, 39.5 parts of diethylene glycol monobutyl ether, 25 parts of phenolic resin, 5 parts of epoxy resin, 0.5 parts of Silok4010 as a defoamer, Silok355 As a leveling agent 1 part, Silok7045 as a wetting and dispersing agent 2 parts, 2246 as an antioxidant 1 part, DBP as a plasticizer 1 part. The conductive ink was prepared by a ball mill. The ball mill was first pre-mixed at a ball mill speed of 200 rad / min for 10 minutes, and then ground at a speed of 300 rad / min until the fineness dropped below 15 μm. The rheological properties of conductive ink were tested by rotational rheometer, the results are as follows Figure 1a and Figure 1b shown. Print a wet film on a PET film substrate by screen printing, and cure it at 140°C for 30 minutes to form an electric heating film. The volume resistivity, electrothermal performance and adhesion level of the electrothermal film were ...

Embodiment 2

[0038] In terms of parts by mass, 10 parts of graphite powder, 30 parts of 100nm superfine carbon powder, 21.5 parts of diethylene glycol monobutyl ether, 20 parts of phenolic resin, 10 parts of epoxy resin, 0.5 parts of Silok4010 as defoamer, and 0.5 parts of Silok355 as 1 part of leveling agent, 5 parts of Silok7045 as wetting and dispersing agent, 1 part of 2246 as antioxidant, and 1 part of DBP as plasticizer. The conductive ink was prepared by a ball mill. The ball mill was first pre-mixed at a ball mill speed of 150 rad / min for 20 minutes, and then ground at a speed of 350 rad / min until the fineness dropped below 15 μm. Afterwards, a wet film was printed on the PET film substrate by screen printing, and cured at 140°C for 20 minutes to form an electric heating film. The volume resistivity, electrothermal performance and adhesion level of the electrothermal film were tested, and the results are shown in Table 1.

Embodiment 3

[0040] In terms of parts by mass, 15 parts of graphite nanosheets, 20 parts of 100nm ultrafine carbon powder, 26.5 parts of diethylene glycol monobutyl ether, 15 parts of phenolic resin, 15 parts of epoxy resin, 0.5 parts of Silok4010 as a defoamer, Silok355 As a leveling agent 1 part, Silok7045 as a wetting and dispersing agent 5 parts, 2246 as an antioxidant 1 part, DBP as a plasticizer 1 part. The conductive ink was prepared by a ball mill. The ball mill was first pre-mixed at a ball mill speed of 200 rad / min for 20 minutes, and then ground at a speed of 350 rad / min until the fineness dropped below 15 μm. Afterwards, a wet film was printed on the PET film substrate by screen printing, and cured at 140°C for 30 minutes to form an electric heating film. The volume resistivity, electrothermal performance and adhesion level of the electrothermal film were tested, and the results are shown in Table 1.

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Abstract

The invention discloses a method for improving the electric heating performance of an electric heating film through an intercalation bridging method and application. The electrothermal film is prepared from conductive ink through a silk-screen printing method. The conductive ink is composed of the following substances: a carbon-series conductive filler, an organic solvent, an epoxy resin and phenolic resin binder, a defoaming agent, a leveling agent, a wetting dispersant, an antioxidant and a plasticizer. The conductive ink is prepared by a ball mill stirring, mixing and grinding one-step method. Wherein the carbon-series conductive filler is composed of superfine carbon powder with a spherical microstructure and a lamellar carbon-series conductive substance. The electrothermal film is intercalated and bridged to construct a conductive network under the interaction of the carbon conductive fillers with different microstructures, so that the electrothermal film has excellent electrothermal performance. The electrothermal film has the advantages of simple preparation process, low cost, good printing applicability, controllable film layer resistance, excellent flexibility, quick response to electrification and recyclability, and is suitable for large-scale preparation.

Description

technical field [0001] The invention relates to the field of electrothermal materials, in particular to a method and application for economically and effectively improving the electrothermal performance of a carbon-based electrothermal film by using an "intercalation bridging" method. Background technique [0002] Electrothermal materials can convert electrical energy into thermal energy conveniently and controllably, and can be widely used in many fields, such as car window defrosting, outdoor displays, household electric heaters, hyperthermia, medical electric heating, etc. Coating electrothermal materials on various On a variety of substrates, it becomes an electric heating film, which can be used to produce electric heating clothing, electric heating carpets, electric heating floors, electric heating walls, etc., and becomes a new material for cold resistance and heating. Patent CN1059924085A uses indium tin oxide (ITO) for the preparation of electrothermal film, which h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/34H05B3/14C09D11/52C09D11/103C09D11/102
CPCH05B3/34H05B3/146C09D11/52C09D11/103C09D11/102Y02B30/00
Inventor 刘维锦高培鑫
Owner SOUTH CHINA UNIV OF TECH
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