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Metal organic framework/conductive polymer derived nanomaterial with electromagnetic wave absorption performance and preparation method and application thereof

A technology of metal-organic frameworks and conductive polymers, applied in the direction of carbon compounds, non-metallic elements, chemical instruments and methods, etc., can solve the problems of different electromagnetic wave absorption, achieve strong adjustability, excellent environmental stability, and improve impedance The effect of degree of matching

Pending Publication Date: 2022-07-08
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the effective absorption frequency band (effective absorption frequency range) of existing MOF-derived materials is generally narrow, and cannot effectively absorb different electromagnetic waves.

Method used

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  • Metal organic framework/conductive polymer derived nanomaterial with electromagnetic wave absorption performance and preparation method and application thereof
  • Metal organic framework/conductive polymer derived nanomaterial with electromagnetic wave absorption performance and preparation method and application thereof
  • Metal organic framework/conductive polymer derived nanomaterial with electromagnetic wave absorption performance and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A metal-organic framework / conductive polymer-derived nanomaterial, the preparation method of which is as follows:

[0056] (1) Add 4.7mL of aniline and 50mL of 2mol / L hydrochloric acid to the three-necked flask, and stir in an ice-water bath for 1h. Dissolve 11.4 g of ammonium persulfate in 25 mL of deionized water, and add it to a three-necked bottle using a dropping funnel within about 30 minutes. The reaction was followed for 1 h, taking care to maintain the temperature. Then, the conductive polyaniline is obtained by washing and drying.

[0057] (2) Dissolve 1.1640 g of cobalt nitrate hexahydrate in 60 mL of methanol, and disperse it ultrasonically for 10 minutes; take 0.0400 g of polyvinylpyrrolidone, dissolve it in 10 mL of methanol, and disperse it ultrasonically for 10 minutes; drop the two solutions into 0.0920 g of dried poly In aniline, the reaction was carried out under magnetic stirring at room temperature for 6 hours to obtain a pre-impregnation solution...

Embodiment 2

[0065] A metal-organic framework / conductive polymer-derived nanomaterial, the difference between its preparation method and embodiment 1 is that the amount of polyaniline in step (2) is increased, and the specific steps are as follows:

[0066] (1) Add 4.7mL of aniline and 50mL of 2mol / L hydrochloric acid to the three-necked flask, and stir in an ice-water bath for 1h. Dissolve 11.4 g of ammonium persulfate in 25 mL of deionized water, and add it to a three-necked bottle using a dropping funnel within about 30 minutes. The reaction was followed for 1 h, taking care to maintain the temperature. Then, the conductive polyaniline is obtained by washing and drying.

[0067] (2) Dissolve 1.1640 g of cobalt nitrate hexahydrate in 60 mL of methanol, and disperse by ultrasonic for 10 minutes; take 0.0400 g of polyvinylpyrrolidone and dissolve it in 10 mL of methanol and disperse by ultrasonic for 10 minutes; drop the two solutions into 0.1380 g of dried poly In aniline, the reaction ...

Embodiment 3

[0072] A metal-organic framework / conductive polymer-derived nanomaterial, the difference between its preparation method and embodiment 1 is that the amount of polyaniline in step (2) is increased, and the specific steps are as follows:

[0073] (1) Add 4.7mL of aniline and 50mL of 2mol / L hydrochloric acid to the three-necked flask, and stir in an ice-water bath for 1h. Dissolve 11.4 g of ammonium persulfate in 25 mL of deionized water, and add it to a three-necked bottle using a dropping funnel within about 30 minutes. The reaction was followed for 1 h, taking care to maintain the temperature. Then, the conductive polyaniline is obtained by washing and drying.

[0074] (2) Dissolve 1.1640 g of cobalt nitrate hexahydrate in 60 mL of methanol, and ultrasonically disperse it for 10 minutes; take 0.0400 g of polyvinylpyrrolidone, dissolve it in 10 mL of methanol, and ultrasonically disperse it for 10 minutes; drop the two solutions into 0.1840 g of dried poly In aniline, the rea...

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Abstract

The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a metal organic framework / conductive polymer derived nanomaterial with electromagnetic wave absorbing performance and a preparation method and application thereof. The metal organic framework / conductive polymer derived nanomaterial comprises a first carbon structure, a second carbon structure and a metal simple substance, the first carbon structure has a net structure and is formed by pyrolysis of conductive polyaniline; the second carbon structure and the metal elementary substance are formed by pyrolyzing a metal organic framework, the metal elementary substance is dispersed in the second carbon structure, and an integral structure formed by the second carbon structure and the metal elementary substance is loaded on the first carbon structure. According to the invention, conductive polyaniline is pyrolyzed to form a net-shaped structure, carbon and metal elementary substances derived from the metal organic framework are loaded, and the conductive polyaniline has a wider response frequency band compared with other conductive polymers, so that the effective absorption frequency band of the metal organic framework / conductive polymer derived nano material to electromagnetic waves is widened.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a metal-organic framework / conductive polymer-derived nanomaterial with electromagnetic wave absorbing properties, and a preparation method and application thereof. Background technique [0002] In recent years, with the development of science and technology, household appliances, mobile terminals, urban rail, high-speed rail, high-voltage power grids and other products have penetrated into people's daily life, bringing convenience to people, but also accompanied by certain electromagnetic radiation, while the power is relatively low. Large electromagnetic wave transmitting equipment such as radio and television signal towers are also installed in areas with high population density. Therefore, the increasingly serious electromagnetic wave pollution has gradually attracted people's attention. The effects of these electromagnetic wave emitting device...

Claims

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Application Information

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IPC IPC(8): H05K9/00H01Q17/00C01B32/205
CPCH05K9/0081H01Q17/00C01B32/205
Inventor 俞宏英张凯蒋旭洲
Owner SUN YAT SEN UNIV
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