Polymer-based electromagnetic shielding material based on carbon fiber and graphene and preparation method of polymer-based electromagnetic shielding material

An electromagnetic shielding material, graphene technology, applied in the field of polymer-based electromagnetic shielding materials and its preparation, can solve the problem that conductive carbon black and carbon fiber cannot form a transport network, the interface adhesion of composite materials is low, and it is difficult to make complex shapes Products and other issues, to achieve good electromagnetic shielding effect, low cost, prevent curl or wrinkle effect

Active Publication Date: 2015-03-18
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent application number 200910176507.1 reports the addition of conductive carbon black, metal magnetic powder and a small amount of carbon fiber to prepare ABS electromagnetic shielding materials. The amount of conductive filler is relatively large, and the added metal powder makes the interface of the composite material low in adhesion, high in cost and large in proportion. Difficult to make pr

Method used

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  • Polymer-based electromagnetic shielding material based on carbon fiber and graphene and preparation method of polymer-based electromagnetic shielding material
  • Polymer-based electromagnetic shielding material based on carbon fiber and graphene and preparation method of polymer-based electromagnetic shielding material
  • Polymer-based electromagnetic shielding material based on carbon fiber and graphene and preparation method of polymer-based electromagnetic shielding material

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Experimental program
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[0031] Example 1

[0032] (1) Add chopped carbon fiber to a mixed solution of concentrated sulfuric acid and concentrated nitric acid (volume ratio of 3:1) according to a mass ratio of 1:75, ultrasonically disperse for 2.5 hours, filter, wash, and dry to obtain acidified carbon fiber.

[0033] (2) Dissolve 1.5 parts of isopropyl tris(dioctyl pyrophosphate acyloxy) titanate in 225 parts of dichloroethane to prepare a solution, add 15 parts of the above acidified carbon fiber and 12 parts of graphene, and treat under ultrasound And stir for 2h to obtain a suspension; dissolve 70 parts of ABS in 700 parts of dichloroethane, add to the above suspension, treat and stir under ultrasound for 2h, dry the resulting mixture at 70℃ for 16h to remove the dichloride Ethane to obtain a mixture powder.

[0034] (3) The mixture powder obtained in step (2), 0.8 parts of antioxidant 1010, and 3 parts of ABS-g-MAH are mixed uniformly, and then sent to the twin-screw extruder to control the temperature...

Example Embodiment

[0036] Example 2

[0037] (1) Add chopped carbon fiber to a mixed solution of concentrated sulfuric acid and concentrated nitric acid (volume ratio of 3:1) according to a mass ratio of 1:75, ultrasonically disperse for 2.5 hours, filter, wash, and dry to obtain acidified carbon fiber.

[0038] (2) Dissolve 1.5 parts of isopropyl tris(dioctyl pyrophosphate acyloxy) titanate in 225 parts of dichloroethane to make a solution, add 12 parts of the above acidified carbon fiber and 15 parts of graphene, and treat under ultrasonic And stir for 2h to obtain a suspension; dissolve 70 parts of ABS in 700 parts of dichloroethane, add to the above suspension, treat under ultrasound and stir for 2h, then dry the mixture at 70℃ for 16h to remove the two Chloroethane to obtain a mixture powder.

[0039] (3) The mixture powder obtained in step (2), 0.8 parts of antioxidant 1076, and 3 parts of ABS-g-MAH are mixed uniformly, and then sent to the twin-screw extruder to control the temperature of each ...

Example Embodiment

[0041] Example 3

[0042] (1) Add chopped carbon fiber to a mixed solution of concentrated sulfuric acid and concentrated nitric acid (volume ratio of 3:1) according to a mass ratio of 1:75, ultrasonically disperse for 2.5 hours, filter, wash, and dry to obtain acidified carbon fiber.

[0043] (2) Dissolve 1.5 parts of isopropyl tris(dioctyl pyrophosphate acyloxy) titanate in 225 parts of dichloroethane to make a solution, add 20 parts of the above acidified carbon fiber and 5 parts of graphene, and treat under ultrasonic And stir for 2h to obtain a suspension; dissolve 70 parts of ABS in 700 parts of dichloroethane, add to the above suspension, treat and stir under ultrasound for 2h, dry the resulting mixture at 70℃ for 16h to remove the dichloride Ethane to obtain a mixture powder.

[0044] (3) The mixture powder obtained in step (2), 0.8 parts of antioxidant 1098, 3 parts of ABS-g-MAH, and 5 parts of acrylonitrile-styrene-acrylate copolymer are mixed uniformly, and then sent to t...

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Abstract

The invention discloses a polymer-based electromagnetic shielding material based on carbon fiber and graphene and a preparation method of the polymer-based electromagnetic shielding material. The polymer-based electromagnetic shielding material is prepared by use of the following steps: firstly, acidizing the carbon fiber and performing ultrasonic dispersion on the acidized carbon fiber and the graphene in a solution containing a coupling agent to prepare an interpenetrating network structure; secondly, adding the solution of a polymer by use of a solvent mixing method and stirring and drying to obtain mixture powder; and finally, evenly mixing the mixture powder with an antioxidant, a compatilizer or other auxiliaries and then extruding and granulating by use of a twin-screw extruder. According to the polymer-based electromagnetic shielding material based on the carbon fiber and the graphene, an intertwined network structure of the carbon fiber and the graphene are kept inside the polymer so that an efficient power transmission and network can be formed in the matrix; the prepared electromagnetic shielding material has a good electromagnetic shielding effect, and also has the characteristic of good comprehensive mechanical properties and thermal conductivity. The polymer-based electromagnetic shielding material has the advantage of expanding the application of the carbon fiber and the graphene in the field of the electromagnetic shielding materials.

Description

technical field [0001] The invention belongs to the technical field of polymer processing and the field of nanotechnology, in particular to a polymer-based electromagnetic shielding material based on carbon fiber and graphene and a preparation method thereof. [0002] Background technique [0003] With the development of the electronics industry, various home appliances, office appliances, instruments and equipment and other electronic products have been widely popularized and applied, which brings convenience to people and also brings problems of electromagnetic radiation and interference, which seriously endanger people's health. It also interferes with the use of electronic devices. At present, most electronic and electrical equipment use polyacrylonitrile-butadiene-styrene (ABS) as the shell material. Since ABS generally has no shielding effect on electromagnetic waves, how to develop a Polymer-based electromagnetic shielding packaging materials with mechanical strengt...

Claims

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Application Information

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IPC IPC(8): C08L55/02C08K13/06C08K9/02C08K9/04C08K7/06C08K3/04
Inventor 杨桂生汪丽娟
Owner HEFEI GENIUS NEW MATERIALS
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