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Electromagnetic shielding type graphene PC composite material and preparation method thereof

A composite material and electromagnetic shielding technology, which is applied in the field of electromagnetic shielding graphene PC composite material and its preparation, can solve the problems of insufficient electrical conductivity and electromagnetic shielding performance, and achieve better flow performance, simple preparation process and improved performance Effect

Active Publication Date: 2018-11-20
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is aimed at the shortcomings of pure polycarbonate as electromagnetic shielding material, such as insufficient electrical conductivity and electromagnetic shielding performance, and provides polycarbonate pellets and polycarbonate powder as polymer matrix, with few-layer graphene and Multilayer graphene is an electromagnetic shielding functional filler, an electromagnetic shielding graphene PC composite material and its preparation method. The prepared composite material has the advantages of good processability, electrical conductivity and electromagnetic shielding performance.

Method used

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  • Electromagnetic shielding type graphene PC composite material and preparation method thereof
  • Electromagnetic shielding type graphene PC composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) 750 parts of PC pellets, 250 parts of PC powder, 40 parts of few-layer graphene, 150 parts of multi-layer graphene, 4 parts of dispersant and 15 parts of processing aid are placed in a high-speed mixer according to the weight ratio. Mix for 5 minutes, the rotation speed of the mixer is 400 rpm; a mixture is obtained.

[0042] (2) The mixture obtained in step (1) is added into a twin-screw extruder, and through an extrusion granulation step, the graphene PC composite material pellets for electromagnetic shielding are obtained. Among them, the temperature and screw speed of each zone of the twin-screw extruder are: the temperature of the first zone is 215°C, the temperature of the second zone is 225°C, the temperature of the third zone is 235°C, the temperature of the fourth zone is 245°C, the temperature of the fifth zone is 255°C, and the temperature of the head is 245°C ; The screw speed is 250r / min. The performance test results of the obtained graphene PC composi...

Embodiment 2

[0044] (1) 800 parts of PC pellets, 200 parts of PC powder, 70 parts of few-layer graphene, 130 parts of multi-layer graphene, 7 parts of dispersant and 12 parts of processing aid are placed in a high-speed mixer in proportion by weight. Mix for 10 minutes, the speed of the mixer is 500 rpm; a mixture is obtained.

[0045](2) The mixture obtained in step (1) is added into a twin-screw extruder, and through an extrusion granulation step, the graphene PC composite material pellets for electromagnetic shielding are obtained. Among them, the temperature and screw speed of each zone of the twin-screw extruder are: the temperature of the first zone is 220°C, the temperature of the second zone is 230°C, the temperature of the third zone is 240°C, the temperature of the fourth zone is 250°C, the temperature of the fifth zone is 260°C, and the temperature of the head is 250°C ; The screw speed is 300r / min. The performance test results of the obtained graphene PC composite material are...

Embodiment 3

[0047] (1) 850 parts of PC pellets, 150 parts of PC powder, 90 parts of few-layer graphene, 110 parts of multi-layer graphene, 9 parts of dispersant and 9 parts of processing aid are placed in a high-speed mixer in proportion by weight. Mix for 15 minutes, the rotation speed of the mixer is 600 rpm; a mixture is obtained.

[0048] (2) The mixture obtained in step (1) is added into a twin-screw extruder, and through an extrusion granulation step, the graphene PC composite material pellets for electromagnetic shielding are obtained. Among them, the temperature and screw speed of each zone of the twin-screw extruder are respectively: the temperature of the first zone is 225°C, the temperature of the second zone is 235°C, the temperature of the third zone is 245°C, the temperature of the fourth zone is 255°C, the temperature of the fifth zone is 265°C, and the temperature of the head is 255°C ; The screw speed is 350r / min. The performance test results of the obtained graphene PC ...

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Abstract

The invention relates to an electromagnetic shielding type graphene PC composite material and a preparation method thereof. The composite material is prepared through 750-850 parts by weight of polycarbonate particle, 150-250 parts by weight of polycarbonate powder, 40-150 parts by weight of few-layer graphene, 40-150 parts by weight of multi-layer graphene, 4-15 parts by weight of dispersant, and5-15 parts by weight of processing additives. The electromagnetic shielding type graphene PC composite material is prepared through a high-speed mixing process and a twin-screw extruding and pelletizing step. The electromagnetic shielding type graphene PC composite material has the advantages of being high in processing forming performance, conducting performance and electromagnetic shielding performance.

Description

technical field [0001] The invention belongs to the technical field of polymer-based composite materials, and relates to a PC composite material and a preparation method thereof, in particular to an electromagnetic shielding graphene PC composite material and a preparation method thereof. Background technique [0002] Communication equipment and electronic and electrical equipment will produce a large amount of electromagnetic radiation pollution during operation. These electromagnetic radiation pollution will not only affect the surrounding ecological environment and the normal operation of precision electronic equipment, but even endanger human safety and health. In order to reduce the damage caused by electromagnetic radiation pollution, electromagnetic shielding protection is considered to be the most direct and effective measure to control electromagnetic radiation pollution. Compared with metal materials, new polymer-based composite materials have the advantages of li...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08K13/04C08K7/00C08K3/04
CPCC08K2201/001C08K2201/014C08L69/00C08L2205/025C08L2205/035C08K13/04C08K7/00C08K3/042
Inventor 田恐虎盛绍顶王静
Owner ANHUI UNIV OF SCI & TECH