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Polymer/graphene foamed material with electromagnetic shielding performance, and preparation method and application thereof

A foaming material and electromagnetic shielding technology, applied in the field of polymer/graphene foaming material and preparation, can solve problems such as processing and foaming process difficulties, and achieve easy industrialized mass production, good market application prospects, and low cost Effect

Inactive Publication Date: 2017-04-19
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, too high a conductive filler greatly increases the viscosity of the polymer solution or melt, which brings great difficulties to the subsequent processing and foaming process

Method used

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  • Polymer/graphene foamed material with electromagnetic shielding performance, and preparation method and application thereof
  • Polymer/graphene foamed material with electromagnetic shielding performance, and preparation method and application thereof
  • Polymer/graphene foamed material with electromagnetic shielding performance, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 0.63 g of graphene into 100 mL of DMF, and ultrasonically disperse for 5 minutes. Then, 15 g of polyurethane particles were added therein, and after high-speed stirring and dissolution, the mixed solution was poured into the scraping groove of a scraper to coat a film on a clean glass plate. After completion, put it in a constant temperature and humidity oven with a temperature of 25° C. and a relative humidity of 78% for 5 hours. Finally, the obtained material was placed in a vacuum oven for drying treatment to obtain a polyurethane / graphene microfoaming film with a graphene content of 4wt.%.

[0035] In addition, polyurethane / graphene microfoamed films with graphene content of 8wt.% and 16wt.% were also prepared by the same method. Wherein, graphene content is the cross-section morphology figure of the polyurethane / graphene microfoam film of 8wt.%. figure 1 As shown, the average cell size is about 5 μm. In addition, the thickness and cell morphology of the ...

Embodiment 2

[0041] The materials used in this example are polyurethane / graphene microfoaming films and polystyrene foams with graphene content of 8wt.% and 16wt.% prepared in Example 1.

[0042] Three kinds of single-layer polystyrene foams with a thickness of 2.1, 6.5 and 13.0 mm were sandwiched between the above two single-layer polyurethane / graphene micro-foamed films, and the layers were bonded with glue to form three kinds of sandwiches. Structural all-in-one polymer / graphene foams.

Embodiment 3

[0048] The materials used in this example are the polyurethane / graphene microfoaming film and polystyrene foam with a graphene content of 8wt.% prepared in Example 1.

[0049] The specific method is that a layer of polystyrene foam with a thickness of 6.5mm is sandwiched between two layers of polyurethane / graphene micro-foamed films with a graphene content of 8wt.%, and the layers are bonded with glue to form a An integrated polymer / graphene foam with a sandwich structure.

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Abstract

The invention discloses a polymer / graphene foamed material with electromagnetic shielding performance, and a preparation method and an application thereof. The method is characterized in that a thermoplastic polymer / graphene micro-foamed film is produced mainly by using a solution blending and phase separation technology, and the thermoplastic polymer / graphene micro-foamed film and a wave transmitting material are bonded by glue to form the integral material with a sandwich structure. The polymer / graphene foamed material has good application prospect in the electromagnetic shielding field.

Description

technical field [0001] The invention belongs to the field of polymer-based electromagnetic shielding materials, in particular to a polymer / graphene foam material with electromagnetic shielding performance, a preparation method and an application. Background technique [0002] Electromagnetic interference refers to the phenomenon that harmful electromagnetic waves interfere with or cause obstacles to the normal functions of electronic devices, referred to as EMI (electromagnetic interference), which generally refers to radio waves, magnetic waves, light waves, sunspots and other natural interference from space. With the rapid development of the modern electronics industry, the number of various wireless communication systems and high-frequency electronic devices has increased sharply, resulting in the increase of electromagnetic interference and the increasingly prominent problem of electromagnetic pollution. On the one hand, electromagnetic radiation will cause serious inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B5/18B32B37/12C08L75/04C08K3/04
CPCB32B9/00B32B5/18B32B37/12B32B2250/40B32B2307/212C08K3/04
Inventor 郑文革李洋沈斌翟文涛张利华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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