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Preparation method of composite carbon-based electrothermal coating

A technology of electrothermal coatings and composite carbons, applied in conductive coatings, epoxy resin coatings, coatings, etc., can solve problems such as low temperature, high resistivity, and gaps in electrothermal performance

Inactive Publication Date: 2019-12-10
罗苗苗
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem mainly solved by the present invention is that carbon-based fillers in current electrothermal coatings have the advantages of light weight, non-toxic and harmless, not easy to oxidize, and low price. Carbon-based electrothermal coatings have the defects of slow temperature rise and low temperature, which make it difficult to be widely used. A preparation method for composite carbon-based electrothermal coatings is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of yellow viscous liquid:

[0031] Weigh polyacrylonitrile and zinc acetate at a mass ratio of 3:2, mix to obtain a mixture, mix the mixture with N,N-dimethylformamide at a mass ratio of 1:3, put it into a beaker, and move the beaker into a water bath In the pot, stir at 60°C for 3h to obtain a yellow viscous liquid.

[0032] Preparation of composite nanofibers:

[0033] Put the above yellow viscous liquid into the electrospinning equipment, apply a voltage of 10kV on the needle, and use a grounded stainless steel plate as the negative receiving screen, 15cm away from the needle, and control the flow rate of the syringe pump to 0.3mL / h, spray into filaments to obtain composite nanofibers.

[0034] Preparation of porous carbon nanofibers:

[0035] Put the composite nanofibers obtained above into a resistance furnace, heat up to 200°C in the air, perform pre-oxidation treatment for 1 hour, and heat up to 800°C under an argon atmosphere after the pre-oxidati...

Embodiment 2

[0045] Preparation of yellow viscous liquid:

[0046] Weigh polyacrylonitrile and zinc acetate at a mass ratio of 3:2, mix to obtain a mixture, mix the mixture with N,N-dimethylformamide at a mass ratio of 1:3, put it into a beaker, and move the beaker into a water bath In the pot, stir at 65°C for 3h to obtain a yellow viscous liquid.

[0047] Preparation of composite nanofibers:

[0048] Put the above yellow viscous liquid into the electrospinning equipment, apply a voltage of 10kV on the needle, and use a grounded stainless steel plate as the negative receiving screen, 15cm away from the needle, and control the flow rate of the syringe pump to 0.3mL / h, spray into filaments to obtain composite nanofibers.

[0049] Preparation of porous carbon nanofibers:

[0050] Put the composite nanofibers obtained above into a resistance furnace, heat up to 250°C in the air, perform pre-oxidation treatment for 2 hours, and heat up to 850°C in an argon atmosphere after the pre-oxidation...

Embodiment 3

[0060] Preparation of yellow viscous liquid:

[0061] Weigh polyacrylonitrile and zinc acetate at a mass ratio of 3:2, mix to obtain a mixture, mix the mixture with N,N-dimethylformamide at a mass ratio of 1:3, put it into a beaker, and move the beaker into a water bath In the pot, stir at 70°C for 4h to obtain a yellow viscous liquid.

[0062] Preparation of composite nanofibers:

[0063] Put the above yellow viscous liquid into the electrospinning equipment, apply a voltage of 11kV on the needle, and use a grounded stainless steel plate as the negative receiving screen, 15cm away from the needle, and control the flow rate of the syringe pump to 0.3mL / h, spray into filaments to obtain composite nanofibers.

[0064] Preparation of porous carbon nanofibers:

[0065] Put the composite nanofibers obtained above into a resistance furnace, heat up to 300°C in air, perform pre-oxidation treatment for 2 hours, and heat up to 900°C in an argon atmosphere after the pre-oxidation tre...

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Abstract

The invention belongs to the technical field of coating preparation, and particularly relates to a preparation method of a composite carbon-based electrothermal coating. The method comprises the steps: taking polyacrylonitrile and zinc acetate as raw materials to obtain porous carbon nanofibers; mixing the porous carbon nanofibers with a mussel mucoprotein liquid, adding catechol oxidase, and carrying out ultrasonic oscillation to obtain reaction filter residues; mixing the reaction filter residues with a silver nitrate solution, and sintering at high temperature to obtain a self-made composite carbon-based filler; and finally, blending and shearing the self-made composite carbon-based filler, resin and other assistants to obtain the composite carbon-based electrothermal coating. Oxidizeddopa groups and unoxidized dopa groups are crosslinked to form a high-molecular reticular polymer which is adsorbed on internal pores and surfaces of the porous carbon nanofibers; the electric heatingcoating has metal ion chelating property, a layer of carbon nano conduction band network is generated between interfaces of metal silver and the porous carbon nanofibers, and the electric conductivity of the composite material is increased. The electric heating coating prepared by the method has the advantages of good electric heating performance, high temperature rise speed, high temperature andwide application prospect.

Description

technical field [0001] The invention belongs to the technical field of coating preparation, and in particular relates to a preparation method of a composite carbon-based electrothermal coating. Background technique [0002] In recent years, traditional electric heating materials such as metal tungsten, molybdenum, nickel and their alloys have been gradually replaced by new electric heating materials due to their shortcomings such as large amount of consumables, short service life, difficult processing and forming, and unstable working conditions. Among them, the electrothermal film is widely used as a heating element product in various fields such as industry and agriculture. [0003] Electric heating film, also known as metal oxide electric heating film. It is made by printing conductive paint on the film, supplemented by metal current-carrying bars, conductive silver paste and other materials. It has the characteristics of high melting point, high hardness, low electrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/24D01F9/22D01F11/12
CPCC08K2003/0806C09D5/24C09D163/00D01F9/22D01F11/12C08K9/04C08K7/24C08K3/08
Inventor 罗苗苗
Owner 罗苗苗
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