Multilayer composite graphene electromagnetic shielding material and preparation method thereof

An electromagnetic shielding material and multi-layer composite technology, applied in the fields of magnetic/electric field shielding, coating, electrical components, etc., can solve the problems of high cost, low environmental tolerance, heavy weight, etc., and achieve low cost and high processing efficiency Effect

Pending Publication Date: 2020-10-09
SUZHOU KANGLIDA PRECISION ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the electromagnetic shielding materials on electronic equipment are mainly electroplated conductive cloth and conductive PI, and the high thermal conductivity materials are mainly graphite, silica gel sheet, silicone grease, phase change material and heat pipe, etc. However, electroplated conductive cloth and conductive PI are easy to

Method used

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  • Multilayer composite graphene electromagnetic shielding material and preparation method thereof
  • Multilayer composite graphene electromagnetic shielding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Select long multi-walled carbon nanotube powder, add deionized water, ultrasonically disperse for 1 hour, and prepare a 10% carbon nanotube water-based slurry; add 1M concentrated sulfuric acid, heat and acidify at 60°C for 1 hour, and then stand and cool for 1 hour; high-speed centrifugation, Wash 5 times with deionized water; add dilute hydrochloric acid for 1 hour, repeat 5 times with deionized water; add deionized water to the acidified multi-walled carbon nanotubes after washing, and disperse ultrasonically until they stand for 30 minutes without aggregation; acidify in the same way Few-layer graphene powder, then add nano-ferric oxide particles, and ultrasonically disperse with deionized water until it stands for 30 minutes without coagulation; figure 1 The structure shown is formed by suction filtration; finally, the third-generation water-based polyurethane coating is evenly coated on the surface of the second layer, and the finished product is obtained after cur...

Embodiment 2

[0035] Add long multi-wall carbon nanotube powder and few-layer graphene powder into deionized water, ultrasonically disperse for 1 hour, and prepare a 10% aqueous slurry. Mix the above slurry with the same quality, ultrasonically disperse for 1 hour; add 1M Concentrated sulfuric acid, heating and acidifying at 60°C for 1 hour, then standing and cooling for 1 hour; high-speed centrifugation, washing with deionized water 5 times; adding dilute hydrochloric acid for 1 hour, repeating deionized water washing 5 times; adding nanometer four Ferric oxide particles and deionized water, ultrasonic dispersion, until standing for 30min without coagulation; figure 2 The structure shown is formed by suction filtration; finally, the third-generation water-based polyurethane coating is evenly coated on the surface of the second layer, and the finished product is obtained after curing.

[0036] The thickness of the water-based polyurethane solidified layer of the composite material is 0.05-...

Embodiment 3

[0038] Select long multi-wall carbon nanotube powder and few-layer graphene powder, add deionized water, ultrasonically disperse for 1 hour, prepare 10% water-based slurry, add ferric chloride solution, and put it into a Teflon-lined reactor The hydrothermal reaction was carried out in the medium; the hydrothermal reaction product was centrifuged and washed with deionized water at high speed, and then deionized water was added for ultrasonic dispersion until it stood for 30 minutes without coagulation; figure 2 The structure is formed by suction filtration; finally, the third-generation water-based polyurethane coating is evenly coated on the surface of the second layer, and the finished product is obtained after curing.

[0039] The thickness of the water-based polyurethane solidified layer of the composite material is 0.05-0.1mm, the thickness of the second layer of carbon-based hybrid shielding layer is 0.25-0.3mm, the thickness of the third layer of fabric base is 0.028mm,...

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Abstract

The invention discloses a multilayer composite graphene electromagnetic shielding material and a preparation method thereof. The multilayer composite graphene electromagnetic shielding material comprises a fabric substrate, wherein a carbon-based shielding layer and an aqueous polyurethane curing layer are sequentially coated on the fabric substrate from bottom to top, and the carbon-based shielding layer is formed by stacking a carbon nanotube layer and a graphene layer, or is formed by mixing carbon nanotubes and graphene. The carbon nanotubes as a typical electromagnetic shielding materialis provided with a longitudinal conductivity and a three-dimensional conductive network, the high-quality thin-layer graphene has an ultra-high horizontal conductivity, in addition, the magnetic shielding of nano ferroferric oxide particles greatly enhances the electromagnetic shielding effectiveness of the material, and the synergistic effect has both electromagnetic shielding effectiveness and heat conduction and heat dissipation effects.

Description

technical field [0001] The invention relates to the technical field of shielding material processing, in particular to a multilayer composite graphene electromagnetic shielding material and a preparation method thereof. Background technique [0002] With the advent of the 5G era, the power consumption of consumer electronic products is increasing, posing higher challenges to electromagnetic compatibility. Among them, electromagnetic interference shielding plays an important role that cannot be ignored. Aiming at the problem of electromagnetic shielding and heat dissipation of high power consumption, a new type of material with high electrical conductivity and high thermal conductivity is on the stage. [0003] At present, the electromagnetic shielding materials on electronic equipment are mainly electroplated conductive cloth and conductive PI, and the high thermal conductivity materials are mainly graphite, silica gel sheet, silicone grease, phase change material and heat ...

Claims

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Application Information

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IPC IPC(8): D06N7/00D06N3/14D06N3/00D06M11/74D06M11/49H05K9/00
CPCD06N7/0094D06N3/14D06N3/0002D06N3/0015D06M11/74D06M11/49H05K9/0088D06N2201/085D06N2209/048D06N2209/143D06N2209/062
Inventor 周元康邹涛唐海军邢敕天
Owner SUZHOU KANGLIDA PRECISION ELECTRONICS CO LTD
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