Graphene-based infrared transmission electromagnetic shielding filter, zinc sulfide window and fabrication method of graphene-based infrared transmission electromagnetic shielding filter

An electromagnetic shielding and graphene-based technology, applied in magnetic/electric field shielding, active shielding, circuits, etc., can solve the problems of complicated process, Moire interference fringes, low transmittance, etc., and achieve simple manufacturing process and suppress fading , the effect of high transmittance

Active Publication Date: 2017-05-10
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the infrared-transmitting electromagnetic shielding filter that can be practically applied on the ZnS window is a laser-etched metal grid. Its special structure effectively reconciles the contradiction between infrared light transmission and high conductivity, but it still has technological The process is complicated, the cost is high, the transmittance is relatively low, and defects such as moiré interference fringes

Method used

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  • Graphene-based infrared transmission electromagnetic shielding filter, zinc sulfide window and fabrication method of graphene-based infrared transmission electromagnetic shielding filter

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preparation example Construction

[0032] The embodiment of the present invention provides a method for preparing a graphene-based infrared transparent electromagnetic shielding filter, which includes the following steps:

[0033] Grow graphene film Gr on the surface of copper foil to obtain a copper foil / Gr composite;

[0034] Spray the polymer transition layer TL on the graphene film side of the copper foil / Gr composite, and obtain the copper foil / Gr / TL composite after curing;

[0035] Spray liquid PMMA (polymethyl methacrylate) on one side of the polymer transition layer of "copper foil / Gr / TL" structure, and obtain a copper foil / Gr / TL / PMMA composite after curing;

[0036] Etch off the copper foil to obtain a Gr / TL / PMMA composite;

[0037] Transfer the Gr / TL / PMMA complex to the inner surface of the zinc sulfide window to obtain the ZnS / Gr / TL / PMMA complex;

[0038] Place the ZnS / Gr / TL / PMMA composite in an organic solvent to dissolve the polymer transition layer and separate the PMMA carrier from the graphene film to obta...

Embodiment 1

[0046] (1) Wrap a 50μm thick high-purity copper foil on a quartz tube and place it in a tube furnace. In the furnace, pass high-purity H at a flow rate of 8 sccmm 2 , Adjust the air valve to keep the air pressure in the furnace at 25Pa, and heat up to 1000°C at a rate of 10°C / s, and keep it for 15min;

[0047] (2) Pass high purity CH into the tube furnace 4 , Keep the pressure in the furnace at 200Pa and react at a high temperature of 1050℃ for 20min. After the reaction, the temperature is reduced to room temperature at a rate of 10°C / s to obtain a copper foil / Gr composite;

[0048] (3) Use a glue spreader to spray a 12μm-thick polymer transition layer TL (transition layer) on the graphene film side of the copper foil / Gr composite, and obtain a copper foil / Gr / TL composite after curing; polymer transition The composition of the layer is as follows: phenolic resin and diazonaphthoquinone are mixed at a mass ratio of 1:1, and benzotriazole is added at 4% of the total mass of the pheno...

Embodiment 2

[0055] (1) Wrap a 50μm thick high-purity copper foil on a quartz tube and place it in a tube furnace. Pass high purity H into the furnace at a flow rate of 8sccmm 2 , Adjust the air valve to keep the air pressure in the furnace at 25Pa, and heat up to 1000°C at a rate of 10°C / s, and hold for 15min;

[0056] (2) Pass high purity CH into the tube furnace 4 , Keep the pressure in the furnace at 200Pa and react at a high temperature of 1050℃ for 20min. After the reaction, the temperature is reduced to room temperature at a rate of 10°C / s to obtain a copper foil / Gr composite;

[0057] (3) Use a glue applicator to spray a polymer transition layer with a thickness of 12 μm on the side of the copper foil / Gr composite graphene film, and then obtain a copper foil / Gr / TL composite after curing; the composition of the polymer transition layer is as follows: phenolic The resin and diazonaphthoquinone are mixed at a mass ratio of 1:1, and benzotriazole is added at 10% of the total mass of the ph...

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Abstract

The invention discloses a graphene-based infrared transmission electromagnetic shielding filter, a zinc sulfide window and a fabrication method of the graphene-based infrared transmission electromagnetic shielding filter. The fabrication method comprises the following steps of growing a graphene thin film Gr on a surface of a copper foil; spraying a macromolecule transition layer TL at one side of the graphene thin film, and obtaining a copper coil / Gr / TL composite body after curing; spraying a liquid-state polymethyl methacrylate (PMMA) at one side of the macromolecule transition layer; etching the copper foil; transferring a Gr / TL / PMMA composite body to an inner surface of the zinc sulfide window; and dissolving the macromolecule transition layer, and separating a PMMA carrier from the graphene thin film to obtain a ZnS / Gr composite body until the electrical performance of the graphene thin film at an inner side of the zinc sulfur window conforms to the electromagnetic shielding requirement and the graphene-based infrared transmission electromagnetic shielding filter is finally formed on the surface of the inner side of the zinc sulfur window. The graphene-based infrared transmission electromagnetic shielding filter is high in infrared transmission and is easy to fabricate.

Description

Technical field [0001] The invention relates to the technical field of electromagnetic shielding, in particular to a graphene-based infrared transparent electromagnetic shielding filter, a zinc sulfide window and a preparation method thereof. Background technique [0002] In modern military applications, it is usually necessary to prepare a functional structure on the inner surface of the zinc sulfide (ZnS) window of the infrared detection and guidance system, so that the window device can ensure the high transmittance of the infrared light wave at the working wavelength (8-12μm). Zone electromagnetic waves have a certain shielding effect to achieve the system's anti-electromagnetic interference and reduce radar reflection cross-section functions. This functional structure is usually called an infrared-transmitting electromagnetic shielding filter. [0003] At present, the infrared-transmitting electromagnetic shielding filter that can be practically applied to the ZnS window is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/09H05K9/00
CPCH01L31/09H05K9/0071H05K9/0094
Inventor 邱阳祖成奎金扬利陈玮韩滨徐博伏开虎
Owner CHINA BUILDING MATERIALS ACAD
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