Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Functionalized graphene/polymethacrylamide composite wave-absorbing material and preparation method thereof

A technology of polymethacrylimide and composite wave-absorbing materials, which is applied in the field of wave-absorbing materials, can solve the problems of inflexible structure application, high density of wave-absorbing materials, and poor impedance matching, and achieve cost reduction, low cost, The effect of optimizing electromagnetic performance

Active Publication Date: 2019-01-22
BEIJING INST OF ENVIRONMENTAL FEATURES
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art, the density of absorbing materials is high, the impedance matching is poor, the absorption bandwidth is narrow, and the structural application is not flexible enough.

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
  • Functionalized graphene/polymethacrylamide composite wave-absorbing material and preparation method thereof
  • Functionalized graphene/polymethacrylamide composite wave-absorbing material and preparation method thereof
  • Functionalized graphene/polymethacrylamide composite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] In the first aspect, the present invention provides a method for preparing a functionalized graphene / polymethacrylimide composite wave absorbing material, such as figure 1 As shown, the method includes the following steps:

[0046] (1) Preparation of functionalized graphene slurry

[0047] The graphene, resin, modifier, coupling agent, dispersant, wetting agent and organic solvent are mixed uniformly to obtain a functionalized graphene slurry; wherein the modifier is selected from any of KH550, KH560, and KH570 One or more, whose mass is 1% to 5% of the mass of graphene; the coupling agent is selected from any one or more of TMC-101, TMC-102, and TMC-201, whose mass is graphene 0.5% to 2% of the quality.

[0048] The surface of graphene is inert, has high chemical stability and is easy to aggregate, making it difficult to disperse evenly in solvents (such as water and organic solvents). Adding graphene to the PMI (Chinese name: polymethacrylimide) matrix also has the problem...

Embodiment 1

[0070] (1) Preparation of functionalized graphene slurry

[0071] Weigh 90 parts by mass of graphene, 1.2 parts by mass of modifier KH550, 210 parts by mass of two-component epoxy resin, 120 parts by mass of absolute ethanol, 1.3 parts by mass of dispersant BYK-W903, 1.2 parts by mass of wetting agent BYK-103 Parts, 0.8 parts by mass of coupling agent TMC-101, high-speed dispersion treatment by a homogenizer, to obtain a homogeneously mixed functionalized graphene slurry.

[0072] (2) Mixing of functionalized graphene slurry and foaming liquid

[0073] Weigh 80 parts by mass of methacrylic acid, 80 parts by mass of methacrylonitrile, 0.7 parts by mass of azobisisobutyronitrile, a mixture of n-butanol and tert-butanol (the mass ratio of the two is 1:1) 8 mass After mixing 2 parts by mass and 3 parts by mass of acrylamide uniformly, add the functionalized graphene liquid slurry prepared in step (1), and disperse the system uniformly through high-speed shear stirring and high-power ult...

Embodiment 2

[0079] (1) Preparation of functionalized graphene slurry

[0080] Weigh 120 parts by mass of graphene, 1.2 parts by mass of modifier KH550, 210 parts by mass of two-component epoxy resin, 120 parts by mass of absolute ethanol, 1.3 parts by mass of dispersant BYK-W903, and 1.2 parts by mass of wetting agent BYK-103 Parts, 0.8 parts by mass of coupling agent TMC-101, high-speed dispersion treatment by a homogenizer, to obtain a homogeneously mixed functionalized graphene slurry.

[0081] (2) Mixing of functionalized graphene slurry and foaming liquid

[0082] Weigh 80 parts by mass of methacrylic acid, 80 parts by mass of methacrylonitrile, 0.7 parts by mass of azobisisobutyronitrile, a mixture of n-butanol and tert-butanol (the mass ratio of the two is 1:1) 8 mass After mixing 2 parts by mass and 3 parts by mass of acrylamide uniformly, add the functionalized graphene liquid slurry prepared in step (1), and disperse the system uniformly through high-speed shear stirring and high-powe...

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

No PUM Login to View More

Abstract

The invention relates to a functionalized graphene / polymethacrylamide composite wave-absorbing material and a preparation method thereof. The preparation method comprises the following steps: (1) mixing graphene, resin, a modifier, a coupling agent, a dispersing agent, a wetting agent and an organic solvent uniformly to obtain functionalized graphene slurry; wherein the modifier is selected from one or more of KH550, KH560 and KH570, and the mass of the modifier is 1-5% of the mass of the graphene; the coupling agent is selected from one or more of TMC-101, TMC-102 and TMC-201, wherein the mass of the coupling agent is 0.5-2% of the mass of the graphene; (2) mixing the functionalized graphene slurry with a foaming liquid; (3) pre-polymerizing; and (4) polymerizing. The product prepared bythe method is reliable in performance and stable in quality, not only can the effect of absorbing electromagnetic waves, but also also has the advantages of light weight, wide frequency and easiness in processing.

Description

Technical field [0001] The invention relates to the technical field of wave absorbing materials, in particular to a functionalized graphene / polymethacrylimide composite wave absorbing material and a preparation method. Background technique [0002] Traditional absorbing materials mainly include ferrite, magnetic metal powder, ceramic materials, etc. For example, carbonyl iron powder has high saturation magnetic induction and high magnetic permeability in the microwave frequency range, which is conducive to achieving high absorption and low reflection. The use of carbonyl iron powder can meet the requirements of high-frequency microwave absorbers and anti-interference devices. However, the impedance matching between carbonyl iron powder and air is not good, and the absorption bandwidth is relatively narrow and the density is relatively high, which limits its application to a certain extent. There are some problems in using these materials alone, such as high density, poor stabili...

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): C08L33/24C08L63/00C08K9/06C08K9/04C08K3/04C08F8/48C08F220/06C08F220/46C08F220/56C08J9/14
CPCC08F8/48C08F220/06C08F220/46C08J9/142C08J2203/12C08J2333/24C08L33/24C08L63/00C08K9/06C08K9/04C08K3/042C08F220/56
Inventor 孙新张连平杨智慧贺军哲巢增明
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com