Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of graphene wave-absorbing material

A wave absorbing material, graphene technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of complex operation, agglomeration of graphene and nano-magnetic particles, etc., and achieve the effect of preventing agglomeration

Inactive Publication Date: 2020-06-02
张猛
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the existing method of compounding ferroferric oxide and graphene for the second time has complex operations, and is prone to agglomeration of graphene and nano-magnetic particles, and provides a hollow spherical ferric oxide / graphene composite Absorbing material and its preparation method

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

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific implementation mode one: a kind of graphene wave-absorbing material of this implementation mode is based on graphene, and is prepared by loading hollow spherical ferric oxide.

specific Embodiment approach 2

[0017] Specific embodiment two: the method for preparing a kind of hollow spherical ferric oxide / graphene composite wave-absorbing material described in specific embodiment one is specifically carried out according to the following steps:

[0018] 1. Grind graphite oxide, then disperse graphite oxide into ethylene glycol aqueous solution, then add ferric salt and reducing agent, mix well, then add chemical reducing agent of graphene oxide to obtain a mixture; wherein ferric salt and reducing agent The mass ratio of graphite oxide is 1:1~20, the mass ratio of ferric salt and reducing agent is 1:0.5~2, and the mass ratio of graphite oxide and chemical reducing agent of graphene oxide is 1:0.01~0.5;

[0019] 2. Put the mixture obtained in step 1 into a polytetrafluoroethylene reactor, control the temperature at 120°C to 250°C, and the reaction time is 3h to 24h, then filter, wash, and dry to obtain a hollow spherical ferric oxide / Graphene composite absorbing material.

specific Embodiment approach 3

[0020] Specific embodiment three: the difference between this embodiment and specific embodiment two is: in step one, the method used to disperse the graphite oxide in the ethylene glycol aqueous solution is ultrasonic or stirring; wherein the power of ultrasonic is 20W~300W, and the time is 30min ~5h. Others are the same as in the second embodiment.

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 discloses a graphene wave-absorbing material and a preparation method thereof. The invention aims to solve the problems of complex operation and easy occurrence of graphene agglomerationin the existing method for secondary compounding of hollow ferroferric oxide and graphene. The graphene wave-absorbing material is prepared by taking graphene as a matrix and loading hollow sphericalferroferric oxide. The method comprises the following steps: 1, uniformly mixing a liquid; and 2, carrying out in-situ nucleation growth. The preparation of the composite material is completed in one-step reaction, so that the pollution introduced into the final material is reduced, and the agglomeration of graphene lamellas can also be prevented by a one-step method. The preparation method is used for preparing the graphene wave-absorbing material.

Description

technical field [0001] The invention relates to a wave-absorbing material and a preparation method thereof. Background technique [0002] At present, there are many materials in the field of microwave absorption, and ferrite material is a relatively mature one. The ferrite material ferric oxide has an inverse spinel structure, which belongs to the cubic crystal system, and electrons can flow in the adjacent Fe 2+ and Fe 3+ Fast back and forth between them, requires low activation energy, exhibits semiconductor properties, and has better conductivity than other ferrites, and ferric oxide is a magnetic material with very unique electrical and magnetic properties. It is a ferrite wave-absorbing material with both magnetic loss and dielectric loss double-complex dielectric, and the loss of electromagnetic waves by ferric oxide includes magneto-induced loss, eddy current loss, polarization loss, domain wall resonance loss, natural resonance loss and iron Magnetic resonance loss...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 张猛
Owner 张猛