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Conductive composite material and its preparation method

A technology of conductive composite materials and polymer materials, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of complicated operation steps, inapplicability to large-scale industrial production, and large cost, and achieve simple operation steps, The effect of saving preparation cost and reducing usage

Inactive Publication Date: 2014-06-11
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can reduce the amount of conductive filler used to a certain extent, they all have disadvantages and certain limitations such as complicated operation steps, consuming a large amount of solvent, and being unsuitable for large-scale industrial production.

Method used

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  • Conductive composite material and its preparation method
  • Conductive composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take the raw material according to the following parts by weight:

[0026] 92 parts of PBT,

[0027] 2 parts graphene,

[0028] 6 parts of carbon nanotubes,

[0029] Accurately weighed materials are sent into the twin-screw extruder through a precision metering feeding device, and the materials are fully fused under the shearing, mixing and conveying of the screws, and finally extruded and granulated through the die head; the twin-screw extruder The length-to-diameter ratio of the extruder is 20:1, the temperature of each section is controlled at 235°C-255°C, and the speed is 20rpm; the carbon nanotube / graphene / PBT pellets are accurately weighed and added to the hot-pressing mold, and then the mold is placed Put it into a flat vulcanizer for hot pressing molding, preheat for 5 minutes, hot pressing temperature 245 ° C, hot pressing time 5 minutes, hot pressing force 5 MPa, then water circulation cooling for 20 minutes, out of the mold to obtain carbon nanotube / graphen...

Embodiment 2

[0031] Take the raw material according to the following parts by weight:

[0032] 99 parts of PBT,

[0033] 0.1 part of graphene,

[0034] 0.9 parts of carbon nanotubes,

[0035] Accurately weighed materials are sent into the twin-screw extruder through a precision metering feeding device, and the materials are fully fused under the shearing, mixing and conveying of the screws, and finally extruded and granulated through the die head; the twin-screw extruder The length-to-diameter ratio of the extruder is 25:1, the temperature of each section is controlled at 235°C-255°C, and the speed is 25rpm; the carbon nanotube / graphene / PBT pellets are accurately weighed and added to the hot-pressing mold, and then the mold is placed Put it into a flat vulcanizer for hot pressing molding, preheat for 5 minutes, hot pressing temperature 245 ° C, hot pressing time 5 minutes, hot pressing force 5 MPa, then water circulation cooling for 20 minutes, out of the mold to obtain carbon nanotube / g...

Embodiment 3

[0037] Take the raw material according to the following parts by weight:

[0038] 94 parts of PBT,

[0039] 0.5 parts of graphene,

[0040] 5.5 parts of carbon nanotubes,

[0041] Accurately weighed materials are sent into the twin-screw extruder through a precision metering feeding device, and the materials are fully fused under the shearing, mixing and conveying of the screws, and finally extruded and granulated through the die head; the twin-screw extruder The length-to-diameter ratio of the extruder is 23:1, the temperature of each section is controlled at 235°C-255°C, and the speed is 25rpm; the carbon nanotube / graphene / PBT pellets are accurately weighed and added to the hot-pressing mold, and then the mold is placed Put it into a flat vulcanizer for hot pressing molding, preheat for 5 minutes, hot pressing temperature 245 ° C, hot pressing time 5 minutes, hot pressing force 5 MPa, then water circulation cooling for 20 minutes, out of the mold to obtain carbon nanotube / ...

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Abstract

The invention provides a conductive composite material and its preparation method, and the conductive composite material is prepared by use of synergistic effects of carbon nanotubes and a graphene filler. The conductive composite material comprises the following components by weight: 92 to 99 parts of a polymer; 0.9 to 6 parts of the carbon nanotubes and 0.1 to 2 parts of graphene. Compared with traditional conductive composites, the conductive composite material uses the synergistic effects of the carbon nanotubes and the graphene filler to realize the following effects of the composite system: first, by mutual connection among the conductive filler, the connection efficiency among the conductive filler is improved, and the conductivity of the conductive composite material is improved; second, the conductive filler plays the purpose of synergistic dispersion to reduce the use amount of the conductive filler; and third, the use amount of the carbon nanotubes and the graphene is reduced, the material preparation cost is saved, mechanical properties of the composite material are not lost, the preparation operation step is simple, consumption of a large amount of solvents is not needed, and the conductive composite material is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a conductive composite material prepared by utilizing the synergy between carbon nanotubes and graphene fillers and a preparation method thereof. Background technique [0002] With the development of the electronics industry and information technology, the requirements for the performance of polymer materials are also getting higher and higher. In addition to the properties of the polymer material itself, in some cases the material is also required to have certain electrical properties to meet the needs of conductive materials, antistatic materials, electromagnetic shielding materials, and planar heating materials. So far, people usually use carbon materials such as carbon black, graphite, carbon fiber and carbon nanotubes as conductive fillers to prepare various conductive composite materials. The use of traditional conductive fillers such as carbon black to prepare c...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K7/00C08K3/04H01B1/24B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/625B29C48/92B29C2948/9218B29C2948/92333B29C2948/9259B29C2948/92609B29C2948/92704
Inventor 刘欣
Owner HEFEI GENIUS NEW MATERIALS
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