CN114560506A - Efficient electromagnetic wave absorption material - Google Patents

Efficient electromagnetic wave absorption material Download PDF

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Publication number
CN114560506A
CN114560506A CN202210214399.8A CN202210214399A CN114560506A CN 114560506 A CN114560506 A CN 114560506A CN 202210214399 A CN202210214399 A CN 202210214399A CN 114560506 A CN114560506 A CN 114560506A
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Prior art keywords
electromagnetic wave
salt
cufe
mos
absorbing material
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CN202210214399.8A
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Chinese (zh)
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杨超
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Hengshui High Tech Zone Zhenzhi Software Development Center
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Hengshui High Tech Zone Zhenzhi Software Development Center
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G39/00—Compounds of molybdenum
    • C01G39/06—Sulfides
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/40—Electric properties
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Abstract

The invention relates to a high-efficiency electromagnetic wave absorbing material which is characterized by being prepared by the following process: (1) mixing Cu salt, Fe salt, trisodium citrate and NH4F is dissolved in deionized water, the mixed solution is transferred into a reaction kettle of polytetrafluoroethylene to react for 12 to 24 hours at 180-2O4(ii) a Mixing CuFe2O4Dissolving in 50-80ml, and the volume ratio is 1: 1, then adding Mo salt, thiourea, glycine and PEG2000, reacting at 180 ℃ for 10-12h to obtain flower-shaped CuFe2O4‑MoS2Flower-like CuFe of high specific surface area2O4‑MoS2Is favorable to the multiple reflection and scattering of electromagnetic wave, CuFe2O4And MoS2Interfacial polarization effect is easy to generate between two components, and the components are synergistically enhancedStrong electromagnetic wave absorption ability. The composite material has simple preparation process and low cost, and has important application value in the fields of aviation, military industry and electronics.

Description

Efficient electromagnetic wave absorption material
Technical Field
The invention relates to a wave-absorbing material and a preparation method thereof, in particular to a high-efficiency wave-absorbing material and a preparation method thereof.
Background
With the wide use of radio communication and electronic appliances, more and more electromagnetic waves flood the lives of people, and the harm caused by electromagnetic radiation pollution is increasingly serious. Therefore, the research on the high-efficiency wave-absorbing material has very important significance for the development of the electromagnetic material technology.
Prior artIn the art, CN108841358A discloses a nano-sheet Fe3O4The preparation method of the intercalated graphene oxide composite wave-absorbing material comprises the following specific steps: s1, placing the graphene oxide solution in a hydrothermal reaction kettle for hydrothermal reaction; s2, respectively adding anhydrous FeCl according to a certain mass ratio to the pure graphene oxide3Carrying out continuous ultrasonic dispersion on anhydrous glucose and NaCl; and S3, filtering and drying the sample obtained in the step S2, performing high-temperature treatment in protective gas, washing the sample in deionized water, drying and grinding. CN107761364A discloses a ferroferric oxide/molybdenum disulfide/carbon fiber composite wave-absorbing material and a preparation method through two-step reaction, firstly, short carbon fibers are subjected to surface treatment, then, the short carbon fibers are mixed with sodium molybdate and thioacetamide, a layer of self-assembled molybdenum disulfide nanosheet vertically grows on the surface of the carbon fibers through hydrothermal reaction, secondly, some ferroferric oxide nano magnetic particles are modified on the surface of the molybdenum disulfide/carbon fiber composite wave-absorbing material through hydrothermal reaction, impedance matching of the composite material is further improved, and the microwave absorption performance of the material is further improved by utilizing the high magnetic loss performance of the magnetic nano particles.
Disclosure of Invention
The invention aims to provide a high-efficiency electromagnetic wave absorbing material, which has strong absorption, wide frequency band and simple and cheap preparation process.
The efficient electromagnetic wave absorbing material is characterized by being prepared by the following process:
(1) mixing 1-5mmol of Cu salt, 2-10mmol of Fe salt, 1-5mmol of trisodium citrate and 1-5mmol of NH4Dissolving F in 50-80ml of deionized water, and carrying out ultrasonic treatment on the mixed solution in an ultrasonic cleaning instrument for 10-15 min to obtain a uniform mixed solution;
(2) transferring the mixed solution obtained in the step (1) into a polytetrafluoroethylene reaction kettle, and reacting at 180 ℃ and 200 ℃ for 12-24h to obtain CuFe2O4；
(3) CuFe obtained in the step (2)2O4Washing with deionized water and ethanol for 2-5 times alternately, and dissolving in 50-80ml at a volume ratio of 1: 1, followed by addition of0.1-0.2mmol of Mo salt, 0.2-0.4mmol of thiourea, 0.4-0.8 mmol of glycine and 10-20 mg of PEG2000, reacting at 200 ℃ for 10-12h to obtain flower-shaped CuFe2O4-MoS2。
Preferably, the Cu salt is copper nitrate or copper sulfate;
preferably, the Fe salt is ferric nitrate or ferric sulfate;
preferably, flower-like CuFe2O4-MoS2The grain diameter is 1-2 microns;
preferably, the Mo salt is molybdenum nitrate;
the technical effects are as follows:
the flower-shaped CuFe with high specific surface area is prepared by regulating and controlling materials2O4-MoS2Is favorable to the multiple reflection and scattering of electromagnetic wave, CuFe2O4And MoS2The interface polarization effect is easily generated between the two components, and the electromagnetic wave absorption capability is synergistically enhanced. The composite material has simple preparation process and low cost, and has important application value in the fields of aviation, military industry and electronics.
Drawings
FIG. 1 is CuFe of the present application2O4-MoS2SEM image of the composite material.
Detailed Description
Example 1
(1) 5mmol of copper nitrate, 10mmol of iron nitrate, 3mmol of trisodium citrate and 5mmol of NH4Dissolving F in 80ml of deionized water, and carrying out ultrasonic treatment on the mixed solution in an ultrasonic cleaning instrument for 15min to obtain uniform mixed solution;
(2) transferring the mixed solution obtained in the step (1) into a polytetrafluoroethylene reaction kettle, and reacting at 180 ℃ for 12h to obtain CuFe2O4；
(3) CuFe obtained in the step (2)2O4Washed 2 times with deionized water and ethanol alternately, and then dissolved in 50ml of a 1: 1, then adding 0.1mmol of molybdenum nitrate, 0.2mmol of thiourea, 0.5mmol of glycine and 12mg of PEG2000, reacting at 180 ℃ for 12h, and passing the productFiltering and washing to obtain flower-shaped CuFe2O4-MoS2。
Example 2
(1) 5mmol of copper nitrate, 10mmol of iron nitrate, 3mmol of trisodium citrate and 3mmol of NH4Dissolving the F in 60ml of deionized water, and carrying out ultrasonic treatment on the mixed solution in an ultrasonic cleaning instrument for 12min to obtain uniform mixed solution;
(2) transferring the mixed solution obtained in the step (1) into a polytetrafluoroethylene reaction kettle, and reacting for 18h at 180 ℃ to obtain CuFe2O4；
(3) CuFe obtained in the step (2)2O4Washed 2 times with deionized water and ethanol alternately, and then dissolved in 50ml of a 1: 1, then adding 0.2mmol of molybdenum nitrate, 0.4mmol of thiourea, 0.5mmol of glycine and 12mg of PEG2000, and reacting at 180 ℃ for 10 hours to obtain flower-shaped CuFe2O4-MoS2。
Comparative example 1
(1) 5mmol of copper nitrate, 10mmol of iron nitrate, 3mmol of trisodium citrate and 5mmol of NH4Dissolving the F in 80ml of deionized water, and carrying out ultrasonic treatment on the mixed solution in an ultrasonic cleaning instrument for 15min to obtain uniform mixed solution;
(2) transferring the mixed solution obtained in the step (1) into a polytetrafluoroethylene reaction kettle, and reacting at 180 ℃ for 12h to obtain CuFe2O4。
Comparative example 2
In 50ml, the volume ratio is 1: adding 0.1mmol of molybdenum nitrate, 0.2mmol of thiourea, 0.5mol of glycine and 12mg of PEG2000 into 1 of ethylene glycol/deionized water, reacting at 180 ℃ for 12h, filtering and washing the product to obtain MoS2。
Table 1 shows the wave absorbing performance of examples 1-2 and comparative examples 1-2.
Matching thickness (mm) Effective bandwidth (GHz) Minimum reflection loss (dB)
Example 1 2 1.42 -24.81
Example 2 2 1.39 -21.42
Comparative example 1 3.1 0.79 -13.32
Comparative example 2 3.3 0.56 -15.39
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (5)

1. The efficient electromagnetic wave absorbing material is characterized by being prepared by the following process:
(1) mixing 1-5mmol of Cu salt, 2-10mmol of Fe salt, 1-5mmol of trisodium citrate and 1-5mmol of NH4Dissolving F in 50-80ml of deionized water, and carrying out ultrasonic treatment on the mixed solution in an ultrasonic cleaning instrument for 10-15 min to obtain uniform mixed solution;
(2) transferring the mixed solution in the step (1) into a reaction kettle of polytetrafluoroethylene to react for 12-24h at 180-2O4；
(3) CuFe obtained in the step (2)2O4Washing with deionized water and ethanol for 2-5 times alternately, and dissolving in 50-80ml at a volume ratio of 1: 1, then adding 0.1-0.2mmol of Mo salt, 0.2-0.4mmol of thiourea, 0.4-0.8 mmol of glycine and (10-20) mg of PEG2000, reacting at the temperature of 180-20 ℃ for 10-12h to obtain flower-shaped CuFe2O4-MoS2。
2. A high efficiency electromagnetic wave absorbing material as claimed in claim 1, wherein the Cu salt is copper nitrate or copper sulfate.
3. A high efficiency electromagnetic wave absorbing material as claimed in claim 1, wherein the Fe salt is ferric nitrate or ferric sulfate.
4. A high efficiency electromagnetic wave absorbing material as claimed in claims 1 to 3, which is flower-like CuFe2O4-MoS2The particle size is 1-2 microns.
5. A high efficiency electromagnetic wave absorbing material as claimed in claims 1 to 4, wherein the Mo salt is molybdenum nitrate.
CN202210214399.8A 2022-03-07 2022-03-07 Efficient electromagnetic wave absorption material Pending CN114560506A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2033030A (en) 2022-09-14 2022-09-28 Univ Yanan Preparation method of novel three-dimensional ferrite foam wave-absorbing material

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005310898A (en) * 2004-04-19 2005-11-04 Shin Etsu Polymer Co Ltd Far-field corresponding electromagnetic wave absorber and its manufacturing method
CN103413921A (en) * 2013-08-26 2013-11-27 中国科学技术大学 Spinel magnetic ferrite/molybdenum disulfide nanometer composite material as well as preparation method and application thereof
WO2018177177A1 (en) * 2017-03-31 2018-10-04 深圳光启高等理工研究院 Method for preparing wave-absorbing material, and wave-absorbing coating
CN111167482A (en) * 2019-12-31 2020-05-19 中国科学院城市环境研究所 MoS2/CuFe2O4Catalyst, preparation method and application thereof
CN112062162A (en) * 2020-09-18 2020-12-11 浙江理工大学 MnFe2O4@MoS2Lamellar spherical magnetic composite material and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005310898A (en) * 2004-04-19 2005-11-04 Shin Etsu Polymer Co Ltd Far-field corresponding electromagnetic wave absorber and its manufacturing method
CN103413921A (en) * 2013-08-26 2013-11-27 中国科学技术大学 Spinel magnetic ferrite/molybdenum disulfide nanometer composite material as well as preparation method and application thereof
WO2018177177A1 (en) * 2017-03-31 2018-10-04 深圳光启高等理工研究院 Method for preparing wave-absorbing material, and wave-absorbing coating
CN111167482A (en) * 2019-12-31 2020-05-19 中国科学院城市环境研究所 MoS2/CuFe2O4Catalyst, preparation method and application thereof
CN112062162A (en) * 2020-09-18 2020-12-11 浙江理工大学 MnFe2O4@MoS2Lamellar spherical magnetic composite material and preparation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JINKUN LIU ET AL.: "Self-assembled MoS2/magnetic ferrite CuFe2O4 nanocomposite for high-efficiency microwave absorption", 《CHEMICAL ENGINEERING JOURNAL》 *
章弈晗: "CuFe2O4纳米材料的制备及光催化性能研究", 《中国优秀博硕士学位论文全文数据库（硕士）工程科技Ⅰ辑》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2033030A (en) 2022-09-14 2022-09-28 Univ Yanan Preparation method of novel three-dimensional ferrite foam wave-absorbing material

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Application publication date: 20220531