Graphene/nano ferrite based water electromagnetic shielding paint and preparation method thereof

A technology of electromagnetic shielding coating and nano-ferrite, which is applied in conductive coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor shielding efficiency of electromagnetic shielding coatings, achieve excellent wave-absorbing performance, and improve absorption Wave performance, overcome the effect of cumbersome operation

Active Publication Date: 2015-12-02
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF5 Cites 55 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, in order to solve the problem of poor shielding effectiveness of electromagnetic shielding coatings with a single conductive substance in the prior art, the present invention discloses a water-based electromagnetic shielding coating with conductive and magnetically permeable composite materials as filler and a preparation method thereof, so as to have both electrical and magnetic properties. Composite wave-absorbing materi...

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Graphene/nano ferrite based water electromagnetic shielding paint and preparation method thereof
  • Graphene/nano ferrite based water electromagnetic shielding paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The formulation of the water-based electromagnetic shielding coating is:

[0017] Electromagnetic shielding filler: 10%

[0018] Water-based acrylate: 70%

[0019] Purified water: 16%

[0020] Sodium Lauryl Sulfonate: 3%

[0021] Coalescing agent lauryl alcohol: 1%

[0022] Electromagnetic shielding filler preparation: accurately weigh 0.27gFeCl according to stoichiometry 3 ·6H 2 O (1mmol), 0.18gCoCl 2 ·6H 2 O (0.5 mmol) was dissolved in 30 mL of water to prepare a solution, added to 2 mL of 15 mg / mL graphene oxide dispersion, and ultrasonicated for 30 minutes. Use sodium hydroxide solution (5M) to adjust the pH to 11, and finally add the reducing agent Na 2 S 2 o 3 ·5H 2 O, put into a reaction kettle, seal it, place it in an oven, and react at 150°C for 15 hours. After washing and centrifuging, the graphene / nano-cobalt ferrite composite material is obtained directly. figure 1 It is a transmission electron microscope (HitachiHT7700) photo of the synthetic m...

Embodiment 2

[0025] The formulation of the water-based electromagnetic shielding coating is:

[0026] Electromagnetic shielding filler: 10%

[0027] Water-based polyurethane: 68%

[0028] Purified water: 16%

[0029] Sodium Lauryl Sulfate: 5%

[0030] Coalescing agent lauryl alcohol ester: 1%

[0031] Electromagnetic shielding filler preparation: accurately weigh 0.48gZn(NO 3 ) 2 ·6H 2O(1.6mmol) and 1.31gFe(NO 3 ) 3 9H 2 O (3.2 mmol) was dissolved in 30 mL of water to prepare a solution, added to 2 mL of 20 mg / mL graphene oxide dispersion, and ultrasonicated for 30 minutes. Use sodium hydroxide solution (5M) to adjust the pH to 11, and finally add the reducing agent Na 2 S 2 o 3 ·5H 2 O, put into a reaction kettle, seal it, place it in an oven, and react at 150°C for 15 hours. After washing and centrifuging, the graphene / nano-copper ferrite composite material is obtained directly.

[0032] Preparation of water-based polyurethane electromagnetic shielding coating: add the pre...

Embodiment 3

[0034] The formulation of the water-based electromagnetic shielding coating is:

[0035] Electromagnetic shielding filler: 20%

[0036] Water-based epoxy resin: 60%

[0037] Purified water: 16%

[0038] OP-10: 3%

[0039] Coalescent Dipropylene Glycol Monobutyl Ether: 1%

[0040] Electromagnetic shielding filler preparation: accurately weigh 0.27gFeCl according to stoichiometry 3 ·6H 2 O (1mmol), 0.06gNiCl 2 ·6H 2 O (0.25mmol), 0.09gCoCl 2 ·6H 2 O (0.25 mmol) was dissolved in 30 mL of water to prepare a solution, added to 2 mL of 15 mg / mL graphene oxide dispersion, and ultrasonicated for 30 minutes. Use sodium hydroxide solution (5M) to adjust the pH to 11, and finally add the reducing agent Na 2 S 2 o 3 ·5H 2 O, put into a reaction kettle, seal it, put it in an oven, and react at 150°C for 24 hours. After washing and centrifuging, the graphene / nano-cobalt-nickel ferrite composite material is obtained directly.

[0041] Preparation of water-based epoxy resin ele...

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
Login to view more

PUM

PropertyMeasurementUnit
Shielding effectivenessaaaaaaaaaa
Shielding effectivenessaaaaaaaaaa
Shielding effectivenessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a graphene/nano ferrite based water electromagnetic shielding paint and a preparation method thereof. Ferrite nanoparticles are loaded on the surface of graphene to prepare a graphene/ferrite nanocomposite with the electrical conductivity of the graphene and the good magnetic property of the nano ferrite, and then the nanocomposite is combined with a water film-forming resin and other auxiliaries to prepare the green and environment-friendly water electromagnetic shielding paint. The preparation method has the characteristics of being simple to operate, high in practicability, free of hazardous substance, capable of making electromagnetic shielding paints suitable for different frequencies and occasions, good in shielding effect, and the like; the prepared graphene/nano ferrite based water electromagnetic shielding paint has excellent electromagnetic shielding performance, and therefore has good application prospect in the field of electromagnetic shielding paints.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave shielding coatings, in particular to graphene / nanometer ferrite-based water-based electromagnetic shielding coatings and a preparation method thereof. Background technique [0002] The rapid development of electronics, electrical, communication and information industries has brought great convenience to people's life and work, and at the same time, electromagnetic radiation pollution has become a new environmental pollution after wastewater pollution, waste gas pollution, solid waste pollution, and noise pollution. , not only cause serious interference to people's daily communication equipment, computers and other electronic systems, pose a serious threat to information security, but also cause immeasurable damage to human health. The absorbing material is a kind of functional material that can absorb and attenuate the electromagnetic waves projected on its surface, and convert them into heat e...

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
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09D175/04C09D163/00C09D133/04C09D5/24C09D5/32C09D7/12
Inventor 赵芸王燕枫矫庆泽黎汉生吴芹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap