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Graphene electroconductive macromolecular composite material and preparation method thereof, and electrothermal film obtained by graphene electroconductive macromolecular composite material

A conductive polymer and composite material technology, applied in the field of graphene, can solve the problems of long-term high-power ultrasound, low concentration of graphene, cumbersome preparation methods, etc., and achieve the effect of good strength, simple equipment and simple process

Inactive Publication Date: 2017-09-08
北京吉泰亿阳科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Similarly, the use of graphene oxide faces the problem of low conductivity caused by insufficient reduction
In the patent CN104538086B (water-based conductive polymer-graphene dispersion liquid and its preparation method), the mixture of conductive polymer and graphene is directly prepared with water-based conductive polymer as the dispersant of graphene, but this method requires more Long time and high-power ultrasound are required, and the obtained graphene concentration is very low (1-10mg / ml), which is not suitable for most electrical and thermal applications
[0007] Although a small number of composite materials formed by graphene and conductive polymers have been reported in current patents and literatures, due to the cumbersome preparation methods and complex equipment of graphene conductive polymer composites, special processes and chemical reduction processes are involved. The use of a large amount of acid and alkali chemicals has problems such as the risk of polluting the environment. Therefore, how to provide a high-conductivity, high-power electrothermal film that can work under low-voltage conditions prepared by a convenient and green method will It is an important topic that needs to be studied urgently in this field

Method used

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  • Graphene electroconductive macromolecular composite material and preparation method thereof, and electrothermal film obtained by graphene electroconductive macromolecular composite material

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preparation example Construction

[0042] Another aspect of the embodiments of the present invention provides a method for preparing a graphene conductive polymer composite material as described in any one of the above embodiments, comprising the following steps:

[0043] Dispersing the graphene prepared by the physical method in an aqueous solution, adding a water-based dispersant, and fully stirring to obtain a viscous slurry;

[0044] Adding a conductive polymer water-based dispersion to the viscous slurry, adding resin and / or resin and initiator under ultrasonic or stirring conditions, and fully stirring to obtain a stable slurry;

[0045] Adding carbon black, carbon nanotubes and graphite to the stable slurry, fully stirring to obtain a conductive slurry;

[0046] Adding a stabilizer, an infrared radiation agent, a defoamer, a leveling agent and a surfactant to the conductive paste, fully stirring, to obtain a graphene conductive polymer paste;

[0047] The graphene conductive polymer slurry is physically...

Embodiment 1

[0054] In 100 parts of viscous slurry (graphene solid content 5%) prepared by high-speed shearing method, add 0.5 part of polyvinylpyrrolidone dispersant, fully stir 10 minutes, form viscous slurry; Add 50 parts of polythiophene (PEDOT : PSS) conductive polymer aqueous dispersion (solid content 10%), under mechanical stirring condition (200RPM, 30 minutes), and add 20 parts of acrylic resins and an amount of initiator; Add 40 parts of carbon black and carbon nanotube mixture ( 1:1), adding an appropriate amount of additives such as stabilizer, defoamer, leveling agent, initiator and surfactant, under mechanical stirring conditions (200RPM, 30 minutes), to obtain graphene conductive polymer slurry. Add the above-mentioned graphene conductive polymer slurry into a sand mill, put in 2000 parts by weight of zirconia grinding balls (1mm: 2mm: 5mm weight ratio is 2:1:1), and grind for 6 hours at 300RPM at normal temperature and pressure , until the graphene conductive polymer slurry...

Embodiment 2

[0056] Put 1 part of graphene powder prepared by wet ball milling into 99 parts of an aqueous solution in which 0.3 part of sodium dodecylbenzenesulfonate has been added, and stir fully for 10 minutes to obtain a uniform black solution; add 30 parts of polypyrrole with high conductivity Molecular aqueous dispersion (solid content 10%), under the condition of high-speed mechanical stirring (500RPM, 30 minutes), add 40 parts of polyurethane resins and appropriate initiator; Then add the mixed powder of 20 parts of conductive carbon black and carbon nanotube ( Weight ratio 2:1), and an appropriate amount of defoamer and leveling agent, continue to stir for 30 minutes to obtain graphene conductive polymer slurry. The above-mentioned graphene conductive polymer slurry is put into the trough of a high-speed shear machine, and sheared and stirred for 2 hours at a speed of more than 3000 RPM to obtain a graphene conductive polymer composite material.

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Abstract

The invention provides a graphene electroconductive macromolecular composite material and a preparation method thereof, and an electrothermal film obtained by the graphene electroconductive macromolecular composite material, and belongs to the technical field of graphene. The electrothermal film has the advantages of high electric conductivity, high power, capability of working under the low-voltage condition and the like, and has a huge application prospect in the fields of winter heating and the like. The graphene electroconductive macromolecular composite material comprises the following components in parts by mass: 0.1 to 10 parts of graphene, 0.1 to 20 parts of electroconductive macromolecules, 5 to 40 parts of resin, 10 to 40 parts of electroconductive functional components and 0.07 to 21 parts of auxiliary functional components, wherein the graphene is prepared by a physical method. The graphene electroconductive macromolecular composite material can be applied to preparation of the electrothermal film for winter heating.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a graphene conductive polymer composite material, a preparation method thereof and an electrothermal film obtained therefrom. Background technique [0002] Graphene is a new nanomaterial with a unique two-dimensional planar structure, composed entirely of carbon atoms, and has good electrical and thermal conductivity, infrared emission and other properties. It has been highly valued by various industries in recent years. According to laboratory tests, it is found that graphene has a high infrared emission rate, surpassing common carbon fibers, carbon crystals and other materials. In principle, graphene, as a heating material, has very high heating efficiency and infrared emissivity, and is the best heat radiation material. [0003] Common graphene exists in the form of powder or film, which are called powder graphene and CVD graphene respectively. Powdered graphene...

Claims

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Application Information

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IPC IPC(8): C08L65/00C08L75/04C08L79/02C08L63/00C08L79/04C08L33/00C08L39/06C08K3/04C08K7/24C08J3/215H05B3/34H05B3/14
CPCC08L65/00C08J3/215C08K2201/001C08K2201/011C08K2201/014C08L75/04C08L79/02C08L2203/16C08L2203/20C08L2205/03H05B3/145H05B3/34C08L33/00C08L39/06C08K7/24C08K3/04C08L79/04C08L63/00
Inventor 钟成
Owner 北京吉泰亿阳科技有限公司
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