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Polyphenylene sulfide-based electromagnetic shielding composite material and preparation method thereof

An electromagnetic shielding material, polyphenylene sulfide-based technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of high material cost, complex raw materials, complex preparation process, etc., and achieve low cost, easy realization, and preparation process simple effect

Active Publication Date: 2020-07-10
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patent is designed to prepare a material with a double percolation structure, the raw material of the material is complex, the cost of silver-plated carbon fiber is relatively high, plasticizers, solubilizers, etc. need to be added, and the preparation process is complicated, resulting in high cost of the material
In addition, the tensile strength of the material is below 35MPa, and the mechanical properties need to be further improved.

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  • Polyphenylene sulfide-based electromagnetic shielding composite material and preparation method thereof
  • Polyphenylene sulfide-based electromagnetic shielding composite material and preparation method thereof

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preparation example Construction

[0026] The preparation method of the polyphenylene sulfide-based electromagnetic shielding composite material of the present invention comprises the following steps:

[0027] a. Graphene nanosheets are dispersed in polyarylene sulfide sulfone to obtain a conductive percolation phase; then the conductive percolation phase is coated on the surface of polyphenylene sulfide particles to obtain composite particles;

[0028] b. Composite particles are hot-pressed to obtain a polyphenylene sulfide-based electromagnetic shielding composite material.

[0029] In the method of the present invention, graphene nanosheets are dispersed in the polyarylene sulfide sulfone phase, the two form a conductive percolation phase, and then the percolation phase is coated on the surface of polyphenylene sulfide particles, and finally prepared by hot pressing Polyphenylene sulfide-based electromagnetic shielding composites with double percolation structures. The preparation method is simple and easy,...

Embodiment 1

[0038] Add 10 parts by weight of polyarylene sulfide sulfone, 3 parts by weight of graphene nanosheets and 100 parts by weight of N-methylpyrrolidone as a solvent into a stirrer, stir and dissolve at 120 ° C, and then add 90 parts by weight of polyphenylene sulfide particles, After stirring for 2 hours, the solvent was removed to obtain polyphenylene sulfide composite particles coated with polyarylene sulfide sulfone and graphene nanosheets. Finally, the composite particles were hot-pressed for 10 minutes at 275°C and 8 MPa, and the obtained polyphenylene sulfide-based electromagnetic shielding composite material has a complete double percolation structure conductive network and excellent mechanical properties and electromagnetic shielding properties. The topography of the conductive network of the percolation structure is shown in figure 1 ,from figure 1 It can be seen in the perfect double percolation structure conductive network. The tensile strength, electrical conductiv...

Embodiment 2

[0040] Add 40 parts by weight of polyarylene sulfide sulfone, 3 parts by weight of graphene nanosheets and 400 parts by weight of N-methylpyrrolidone as a solvent into the stirrer, stir and dissolve at 150 ° C, and then add 60 parts by weight of polyphenylene sulfide particles, After stirring for 3 hours, the solvent was removed to obtain polyphenylene sulfide composite particles coated with polyarylene sulfide sulfone and graphene nanosheets. Finally, the composite particles were hot-pressed for 15 minutes at 290°C and 5 MPa. The obtained composite material has a complete double percolation structure conductive network and excellent mechanical properties and electromagnetic shielding properties. Its tensile strength is 62.7 MPa, electrical conductivity The rate is 48.7S / m, and the electromagnetic shielding effectiveness is 47.6dB.

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Abstract

The invention relates to a polyphenylene sulfide-based electromagnetic shielding composite material and a preparation method thereof, and belongs to the technical field of polymer-based functional composite materials. The technical problem solved by the invention is to provide a polyphenylene sulfide-based electromagnetic shielding composite material with better mechanical properties. The composite material is a composite material with a double percolation structure prepared from the following components in parts by weight: 60-90 parts of polyphenylene sulfide, 10-40 parts of polyarylene sulfide sulfone, and 0.5-3 parts of graphene nanosheets. share. The present invention adopts the distribution structure design of the conductive filler, combined with the excellent comprehensive performance of polyphenylene sulfide itself, adopts specific raw materials and specific proportions, and obtains a high-performance special engineering resin-based electromagnetic shielding compound with excellent mechanical properties and electromagnetic shielding properties. material, which completely solves the problem of poor mechanical properties of conductive polymer shielding materials, which makes it difficult to apply to harsh environments such as high temperature and strong corrosion. Moreover, the preparation process of the material is simple, the cost is low, the material is easy to realize, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a polyphenylene sulfide-based electromagnetic shielding composite material and a preparation method thereof, and belongs to the technical field of polymer-based functional composite materials. Background technique [0002] Although the rapid development of modern electronic appliances and communication equipment has brought endless convenience to people's life, it has also caused serious electromagnetic radiation. Electromagnetic radiation not only interferes with electrical equipment, but also threatens human living environment and even health. Therefore, the research and development of electromagnetic shielding materials has become an increasingly important research topic in academia and industry. Compared with traditional metal-based electromagnetic shielding materials, conductive polymer composite materials have the advantages of good processability, light weight, corrosion resistance, and adjustable shielding performance,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08L81/06C08K7/00C08K3/04C08K9/10H05K9/00
CPCC08K2201/011C08L81/02H05K9/0083C08L81/06C08K7/00C08K3/042C08K9/10
Inventor 王孝军曹轶杨杰杨家操龙盛如张刚
Owner SICHUAN UNIV