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Preparation method for graphene and metal composite electromagnetic shielding film

An electromagnetic shielding film, metal composite technology, applied in metal layered products, chemical instruments and methods, layered products, etc., can solve the problems of large-scale continuous preparation of difficult graphene films, achieve rapid absorption and conversion of energy, Wide source of raw materials, the effect of improving absorption and conduction efficiency

Active Publication Date: 2014-12-17
ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing preparation methods are difficult to achieve large-scale continuous preparation of structured graphene films.
Large-scale fabrication of structurally controllable graphene-metal composite films remains a challenge

Method used

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  • Preparation method for graphene and metal composite electromagnetic shielding film
  • Preparation method for graphene and metal composite electromagnetic shielding film
  • Preparation method for graphene and metal composite electromagnetic shielding film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) 1 g of graphene oxide and 5 g of deionized water were treated at 20° C. with a 50 KHz ultrasonic wave for 10 hours to obtain a graphene oxide solution.

[0034] 2) Extrude the graphene oxide solution at a speed of 200 mL / h in a preparation device with a straight die, stay in the n-butanol coagulation solution at 80°C for 100 seconds to solidify to form a film, and obtain the oxidized graphene membrane.

[0035] 3) The graphene oxide film obtained in step (2) was reduced for 100 hours in an aqueous glucose solution with a mass fraction of 20%, washed and dried to obtain a high-strength graphene film.

[0036] 4) Deposit silver nanoparticles with a thickness of 0.01 μm on the surface of the graphene film obtained in step (3) by vacuum evaporation to obtain a graphene-silver composite electromagnetic shielding film. The vacuum evaporation condition is a vacuum degree of 2 Pa, The metal evaporation temperature is 1000°C.

[0037] After the above steps, the prepared gra...

Embodiment 2

[0039] 1) 1g of graphene oxide and 150g of tetrahydrofuran were ultrasonically treated at 20°C at 50 KHz for 0.1 hour to obtain a graphene oxide solution.

[0040] 2) Extrude the graphene oxide solution at a speed of 100 mL / h in a preparation device with a straight die, stay in ethanol coagulation solution at 10°C for 10 seconds to solidify to form a film, and obtain graphene oxide after drying membrane.

[0041] 3) The graphene oxide film obtained in step (2) was reduced for 1 hour in a hydriodic acid aqueous solution with a mass fraction of 20%, washed and dried to obtain a high-strength graphene film.

[0042] 4) Deposit copper nanoparticles with a thickness of 1000 μm on the surface of the graphene film by chemical electroplating on the graphene film obtained in step (3) to obtain a graphene-copper composite electromagnetic shielding film. The electroplating solution used was 5% copper sulfate solution, the deposition voltage was 7V, the current was 0.5A, and the depositi...

Embodiment 3

[0045] 1) 1g of graphene oxide and 25g of N,N-dimethylformamide were ultrasonically treated at 20°C at 50 KHz for 1 hour to obtain a graphene oxide solution.

[0046] 2) Extrude the graphene oxide solution at a speed of 1000 mL / h in a preparation device with a straight die, stay in methanol coagulating liquid at 60°C for 1 second to solidify to form a film, and obtain graphene oxide after drying membrane.

[0047] 3) The graphene oxide film obtained in step (2) was reduced in 40% hydroiodic acid for 3 hours, washed and dried to obtain a high-strength graphene film.

[0048] 4) The graphene film obtained in step (3) is deposited on the surface of the graphene film with nickel nanoparticles with a thickness of 100 μm by electroless plating to obtain a graphene-nickel composite electromagnetic shielding film. The electroplating uses a mixed aqueous solution of 2% nickel sulfate and 5% nickel chloride, the deposition voltage is 5V, the current is 0.2A, and the deposition time is ...

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Abstract

The invention discloses a preparation method for a graphene and metal composite electromagnetic shielding film. The method comprises the steps of extruding graphene or graphene oxide dispersion liquid from a horizontal type die orifice preparation device by a solution wet spinning method, and performing solidification drying reduction to obtain a graphene film; then depositing metal on the surface of the graphene film through physical vapor deposition or chemical electroplating to obtain the electromagnetic shielding film in which the graphene film is used as a substrate and a single surface or two surfaces is or are covered by a metal layer or two metal layers. The graphene film prepared by the preparation method is adjustable in thickness and size; a micro structure is regular; the grahene film is extremely high in conductivity and wide in absorption frequency band, and has a wide application prospect in the field of electromagnetic shielding and wave absorption.

Description

technical field [0001] The invention relates to a preparation method of a graphene film, in particular to a preparation method of a graphene metal composite electromagnetic shielding film. Background technique [0002] The interference of electronic components to the outside world is called EMI (Electromagnetic Interference). With the development of information and communication equipment, electronic and electrical products tend to be multi-functional and miniaturized, the number of portable electronic products is increasing rapidly, and electromagnetic wave pollution in the environment is also becoming more and more serious, which not only causes various instrument function failures and system errors, but also easily harms the human body. make an impact. Traditional battery shielding materials are based on metals, which have the disadvantages of high material density, easy corrosion, and narrow absorption band. Therefore, requirements such as light weight, high shielding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04B32B15/02
Inventor 高超刘峥李拯孙海燕夏芝香
Owner ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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