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Polymer-graphene-polyaniline electromagnetic shielding composite material and preparation method thereof

A graphene composite, electromagnetic shielding technology, applied in the field of functional polymer materials, can solve the problems of narrow shielding band, affecting the overall performance of composite materials, poor shielding effectiveness, etc., achieving excellent conductivity and electromagnetic shielding performance, and adjustable electromagnetic shielding effectiveness. Controllable and easy to process and form the effect

Active Publication Date: 2018-02-06
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Metals and metal-based composite materials have good shielding effectiveness, but they have disadvantages such as large specific weight, high price, easy corrosion, narrow shielding band, and difficult adjustment of shielding effectiveness.
Conductive polymers (polyaniline) also have the potential to be designed as electromagnetic shielding materials, and have incomparable advantages over traditional metal-based shielding materials: light weight, low cost, easy processing and molding, easy to adjust conductivity, outstanding mechanical properties, easy to expand area coating and convenient construction; new carbon materials (graphene, carbon nanotubes, etc.) Due to the problems of poor quality, low yield and high cost, the high polymer / new carbon material electromagnetic shielding materials currently prepared have low graphene content and poor shielding effectiveness; the combination of graphene, conductive polyaniline and polymer matrix Composite to obtain a polymer-graphene-polyaniline electromagnetic shielding composite material, which will surely produce good electromagnetic shielding performance
The main problem is that graphene is easy to agglomerate and has poor dispersion in the polymer matrix; polyaniline has poor compatibility with polymers and graphene, which in turn affects the overall performance of composite materials

Method used

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  • Polymer-graphene-polyaniline electromagnetic shielding composite material and preparation method thereof
  • Polymer-graphene-polyaniline electromagnetic shielding composite material and preparation method thereof
  • Polymer-graphene-polyaniline electromagnetic shielding composite material and preparation method thereof

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Embodiment 1

[0039] The polymer-graphene-polyaniline electromagnetic shielding composite material of this embodiment is mainly made of the following raw materials in weight percentage: 5% polyurethane, 15% modified expanded graphite, 10% aniline, N-phenyl maleamide 3% lanthanum (III) acid radical, 2% stearic acid, and the balance is polyvinyl chloride; the modified expanded graphite is after interface treatment with a titanate coupling agent (such as NDZ-311 or NTC-131, etc.) Expanded graphite, the mass of titanate coupling agent is 4% of the mass of expanded graphite, and the interface treatment time is 15min. Expanded graphite is made of expandable graphite with an expansion ratio higher than 220 and expanded by microwave irradiation for 8s.

[0040] The preparation method of the polymer-graphene-polyaniline electromagnetic shielding composite material of the present embodiment comprises the following steps:

[0041] Step 1. Mix polyvinyl chloride, polyurethane, N-phenylmaleamatolanthanu...

Embodiment 2

[0049] The polymer-graphene-polyaniline electromagnetic shielding composite material of this embodiment is mainly made of the following raw materials in percentage by weight: chlorinated polyethylene 10%, modified expanded graphite 15%, aniline 5%, and the balance is poly Propylene; the modified expanded graphite is expanded graphite after interface treatment with a titanate coupling agent (such as NDZ-311 or NTC-131, etc.), and the quality of the titanate coupling agent is 3% of the expanded graphite quality, The interface treatment time is 20 minutes, and the expanded graphite is made of expandable graphite with an expansion ratio higher than 220, which is expanded by microwave irradiation for 15 seconds.

[0050] The preparation method of the polymer-graphene-polyaniline electromagnetic shielding composite material of the present embodiment comprises the following steps:

[0051] Step 1. After uniformly mixing polypropylene and chlorinated polyethylene, use a disc-shaped me...

Embodiment 3

[0058] The polymer-graphene-polyaniline electromagnetic shielding composite material of this embodiment is mainly made of the following raw materials in weight percentage: 8% polyurethane, 10% modified expanded graphite, 20% aniline, and the balance is polycarbonate; The modified expanded graphite is expanded graphite after interface treatment with a titanate coupling agent (such as NDZ-311 or NTC-131, etc.), the quality of the titanate coupling agent is 5% of the expanded graphite mass, and the interface treatment The time is 10 minutes, and the expanded graphite is made of expandable graphite with an expansion ratio higher than 220, which is expanded by microwave irradiation for 3s.

[0059] The preparation method of the polymer-graphene-polyaniline electromagnetic shielding composite material of the present embodiment comprises the following steps:

[0060] Step 1. After uniformly mixing polycarbonate and polyurethane, use a disc-shaped mechanochemical reactor to grind for ...

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Abstract

The invention discloses a polymer-graphene-polyaniline electromagnetic shielding composite material, which is mainly made of the following raw materials in weight percentage: 2.5%-15% of thermoplastic elastomer, 2.5%-20% of modified expanded graphite, 5% to 20% of aniline, 0% to 20% of processing aids, and the balance being matrix resin; the thermoplastic elastomer is one or more of chlorinated polyethylene, polyurethane and styrene-based block copolymers; The matrix resin is polyvinyl chloride, polyolefin, polycarbonate or acrylonitrile-butadiene-styrene copolymer. In addition, the invention discloses a preparation method of the composite material. The polymer-graphene-polyaniline electromagnetic shielding composite material of the present invention has the characteristics of less filler consumption, simple preparation process, and excellent conductivity and electromagnetic shielding performance. In addition to meeting the needs of electromagnetic shielding materials in daily life, it can also be applied to the military field.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and in particular relates to a polymer-graphene-polyaniline electromagnetic shielding composite material and a preparation method thereof. Background technique [0002] With the rapid development of modern electronic industry, electronic appliances and radio communication are widely used, electromagnetic radiation has become another major public hazard after noise pollution, air pollution, water pollution and solid waste pollution. Electromagnetic waves not only interfere with the normal operation of various electronic equipment, threaten the information security of communication equipment, but also cause great harm to human health. At present, the main method to eliminate the hazards of electromagnetic waves is to use electromagnetic shielding materials to shield them. Therefore, exploring efficient electromagnetic shielding materials has become an urgent problem to be solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L23/12C08L69/00C08L55/02C08L23/06C08L23/08C08L25/06C08L75/04C08L23/28C08L53/00C08L79/02C08K9/04C08K3/04C08K5/09C08G73/02
CPCC08G73/0266C08L23/06C08L23/0815C08L23/12C08L25/06C08L27/06C08L55/02C08L69/00C08L2205/02C08L2205/03C08L2205/035C08L75/04C08L79/02C08K9/04C08K3/04C08K5/09C08L23/286C08L53/00
Inventor 李侃社汪晓芹牛红梅陈创前康洁李锦闫兰英梁耀东朱雪丹杨小刚
Owner XIAN UNIV OF SCI & TECH
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