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High-strength electromagnetic shielding and heat-conducting pbt/pet nanocomposite material and preparation method

A nanocomposite material and electromagnetic shielding technology, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high cost, complicated preparation process, and large amount of fillers, etc., to achieve inhibition Agglomeration, reduce solvent usage, improve dispersion effect

Active Publication Date: 2021-10-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the above that the preparation process of the high-stacked graphene filler is complicated, and there are many types of graphene added, and the amount of filler added in the material is large and the cost is high.

Method used

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  • High-strength electromagnetic shielding and heat-conducting pbt/pet nanocomposite material and preparation method
  • High-strength electromagnetic shielding and heat-conducting pbt/pet nanocomposite material and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A high-strength electromagnetic shielding and heat-conducting PBT / PET nanocomposite material and a preparation method thereof, comprising the following components by weight: 70 parts of polybutylene terephthalate, 30 parts of polyethylene terephthalate Parts, 5 parts of glycidyl methacrylate grafted ethylene-octene copolymer, graphene-Fe 3 o 4Composite filler 5 parts, silane coupling agent KH560 0.5 part, antioxidant 10100.5 part, antioxidant 168 0.5 part.

[0029] The graphene-Fe 3 o 4 Composite filler, the specific preparation steps are as follows:

[0030] (1) the large-diameter graphene microsheets (thickness is 5-100nm, particle size D 50 90.0-130.0μm, number of layers > 10 layers), small diameter graphene microflakes (thickness 5-100nm, particle size D 50 10.0-14.0 μm, the number of layers > 10 layers) and sodium dodecylbenzenesulfonate are added to deionized water at a mass ratio of 2:1:3:350, ultrasonically dispersed for 3-5 hours to obtain a graphene dispe...

Embodiment 2

[0038] The method of the present embodiment is basically the same as the method of Example 1, the difference is that the addition of the polybutylene terephthalate is 80 parts, and the addition of the polyethylene terephthalate is 20 parts .

Embodiment 3

[0040] The method of this embodiment is basically the same as that of Example 1, except that the addition amount of the glycidyl methacrylate grafted ethylene-octene copolymer is 10 parts.

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Abstract

The invention discloses a high-strength electromagnetic shielding and heat-conducting PBT / PET nanocomposite material and a preparation method thereof. The nanocomposite material comprises the following components in parts by weight: 70-80 parts of polybutylene terephthalate, polybutylene terephthalate 20-30 parts of ethylene terephthalate, 5-10 parts of toughening agent, graphene-Fe 3 o 4 Composite filler 5-10 parts, filler surface treatment agent 0.05-1 part, antioxidant 0.5-1.4 parts; graphene-Fe 3 o 4 The composite filler is made by chemical co-precipitation in the graphene stripping solution system after the aqueous phase exfoliation of graphene with different sheet diameters. The PBT / PET nanocomposite material prepared by the invention has excellent electromagnetic shielding performance through the synergistic effect of dielectric loss and magnetic loss, and the shielding mechanism is mainly to absorb electromagnetic waves. In addition, graphene with different sheet diameters improves the mechanical properties of the material while forming a perfect electrical and thermal network.

Description

technical field [0001] The invention belongs to the technical field of preparation of electromagnetic shielding and heat-conducting composite materials, and relates to a high-strength electromagnetic shielding and heat-conducting PBT / PET nanocomposite material and a preparation method thereof. Background technique [0002] With the rapid development of wireless communication technology, electronic communication equipment is widely used, which brings great convenience to people's life. However, these electronic communication devices will generate electromagnetic radiation during use, which will not only cause electromagnetic interference between devices and leakage of electromagnetic information, but also cause harm to human health. At present, the main method to solve the problem of electromagnetic radiation is to use electromagnetic shielding materials to shield and absorb electromagnetic waves, and convert the absorbed electromagnetic waves into Joule heat dissipation. Am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L51/06C08K13/06C08K9/10C08K9/04C08K3/04C08K3/22B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C08K2003/2275C08K2201/011C08L67/02C08L2205/025C08L2205/03C08L51/06C08K13/06C08K9/10C08K9/04C08K3/042C08K3/22
Inventor 高珠怡尚梦瑶程亨伦申屠宝卿
Owner ZHEJIANG UNIV
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