MOF-derived composite wave-absorbing material as well as preparation method and application thereof

A technology of composite absorbing materials and mixtures, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of narrow effective absorption bandwidth, complex synthesis and high density of composite absorbing materials, and achieve favorable impedance matching , Excellent electromagnetic wave attenuation ability, simple preparation effect

Pending Publication Date: 2021-12-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for preparing MOF-derived composite wave-absorbing materials in order to solve the problems of complex synthesis of composite wave-absorbing materials in the prior art, high density, and narrow effective absorption bandwidth.

Method used

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  • MOF-derived composite wave-absorbing material as well as preparation method and application thereof
  • MOF-derived composite wave-absorbing material as well as preparation method and application thereof
  • MOF-derived composite wave-absorbing material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of a MOF-derived composite wave-absorbing material, comprising the steps of:

[0034] (1): 166mg (1mmol) H 2 BDC powder was dissolved in 16.6mL DMF solution, then the mixed solution was stirred at 1000rpm on a magnetic stirrer for 10min, after stirring, 270mg (1 mmol) FeCl was added 3 ·6H 2 O and 128 mg (0.5 mmol) Ni(acac) 2 The powder was mixed by ultrasound for 20 minutes, and then the mixture was transferred to a stainless steel autoclave at 120°C for hydrothermal reaction, and the hydrothermal reaction time was 12 hours. After the completion of the hydrothermal reaction, cool to room temperature and centrifuge to obtain a brown precipitate, which is then washed 6 times with DMF and ethanol. Finally, the brown product was dried overnight in an oven at 70 °C.

[0035] (2): Put the FeNi-MIL-101 prepared in step 1 into a tube furnace, and heat up to 700°C for 2 hours at a rate of 5°C / min in a nitrogen atmosphere. After the calcination, the final...

Embodiment 2

[0041] A preparation method of a MOF-derived composite wave-absorbing material, comprising the steps of:

[0042] (1): 166mg (1mmol) H 2 BDC powder was dissolved in 16.6mL DMF solution, then the mixed solution was stirred at 1000rpm on a magnetic stirrer for 10min, after stirring, 270mg (1 mmol) FeCl was added 3 ·6H 2 O and 128 mg (0.5 mmol) Ni(acac) 2 The powder was mixed by ultrasound for 20 minutes, and then the mixture was transferred to a stainless steel autoclave at 120°C for hydrothermal reaction, and the hydrothermal reaction time was 12 hours. After the completion of the hydrothermal reaction, cool to room temperature and centrifuge to obtain a brown precipitate, which is then washed 6 times with DMF and ethanol. Finally, the brown product was dried overnight in an oven at 70 °C.

[0043] (2): Put the FeNi-MIL-101 prepared in step 1 into a tube furnace, and heat up to 600°C for 2 hours at a rate of 5°C / min in a nitrogen atmosphere. After the calcination, the final...

Embodiment 3

[0046] A preparation method of a MOF-derived composite wave-absorbing material, comprising the steps of:

[0047] (1): 166mg (1mmol) H 2 BDC powder was dissolved in 16.6mL DMF solution, then the mixed solution was stirred at 1000rpm on a magnetic stirrer for 10min, after stirring, 270mg (1 mmol) FeCl was added 3 ·6H 2 O and 128 mg (0.5 mmol) Ni(acac) 2 The powder was mixed by ultrasound for 20 minutes, and then the mixture was transferred to a stainless steel autoclave at 120°C for hydrothermal reaction, and the hydrothermal reaction time was 12 hours. After the completion of the hydrothermal reaction, it was cooled to room temperature and centrifuged to obtain a brown precipitate, which was then washed 6 times with DMF and ethanol. Finally, the brown product was dried overnight in an oven at 70 °C.

[0048] (2): Put the FeNi-MIL-101 prepared in step 1 into a tube furnace, and heat up to 800°C for 2 hours at a rate of 5°C / min in a nitrogen atmosphere. After the calcination...

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Abstract

The invention provides a preparation method of an MOF-derived composite wave-absorbing material. The preparation process is simple, the cost is low, large-scale mass production can be realized, and the prepared wave-absorbing material has good impedance matching, wide effective absorption bandwidth and high reflection loss value. The ordered porous wave-absorbing material is synthesized by taking MOFs as a template, and magnetic metal, alloy or metal oxide generated after calcination can bring excellent magnetic loss, which is beneficial to impedance matching and wider effective absorption bandwidth.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a composite wave absorbing material derived from MOF and its preparation method and application. Background technique [0002] At present, people rely more and more on the great convenience brought by electronic products, but it also causes many electromagnetic wave interference problems. Studies have shown that for people who have been exposed to electromagnetic radiation for a long time, the central nervous system, reproductive system and immune system will be damaged to varying degrees. In recent years, nanomagnetic metals, alloys or metal oxides have been synthesized one after another. Absorbing materials mainly use the interaction between materials and electromagnetic waves to achieve electromagnetic wave absorption. "Strong, wide, light, and thin" is the development goal of absorbing materials. To achieve this goal, researchers have develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00H01Q17/00C01B32/90
CPCH05K9/0081H01Q17/008C01B32/90C01P2002/72C01P2004/03C01P2002/82C01P2004/30
Inventor 胡军金红都温慧敏
Owner ZHEJIANG UNIV OF TECH
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