A kind of thermoplastic polyurethane/graphene foam material and its preparation method and application

A technology of thermoplastic polyurethane and foaming materials, applied in the direction of chemical instruments and methods, coatings, layered products, etc., can solve the problems of environmental secondary pollution, electromagnetic wave reflection enhancement, etc., to improve absorption loss, reduce weight and cost, The effect of high market application prospects
CN106566226BActive Publication Date: 2019-04-02NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Publication Date
2019-04-02

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Abstract

The invention discloses a thermoplastic polyurethane / graphene foam material and a preparation method and application thereof. The thermoplastic polyurethane / graphene foam material has high electromagnetic shielding effectiveness and high wave absorbing performance. According to the method, firstly, single-layer thermoplastic polyurethane / graphene microfoam films are prepared through a phase separation method, then, the single-layer thermoplastic polyurethane / graphene microfoam films with the different graphene contents are bonded into an integrated material through glue, and therefore gradient dispersion of graphene in the thermoplastic polyurethane / graphene foam material is achieved. The gradient structure can endow the thermoplastic polyurethane / graphene foam material with good shielding effectiveness and meanwhile can greatly improve the wave absorbing performance of the material, and the prepared light thermoplastic polyurethane / graphene foam material has good application prospects in the fields of electromagnetic shielding and wave absorbing materials.
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Description

technical field

[0001] The invention belongs to the field of polymer-based electromagnetic shielding materials, and in particular relates to a thermoplastic polyurethane / graphene foam material and its preparation method and 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 interference to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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