Multi-walled carbon nanotube/ferroferric oxide/nano oxide hybridized wave absorbing material and preparation method therefor

A technology of multi-walled carbon nanotubes and iron tetroxide, applied in the field of electromagnetic composite materials, can solve the problems of narrow absorption band, weak performance, poor impedance matching characteristics, etc., to achieve enhanced wave absorption performance, overcome agglomeration and uneven dispersion , the effect of good microwave absorption performance

Active Publication Date: 2020-01-24
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large dielectric constant of carbon-based absorbents, when used alone, there are d...

Method used

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  • Multi-walled carbon nanotube/ferroferric oxide/nano oxide hybridized wave absorbing material and preparation method therefor
  • Multi-walled carbon nanotube/ferroferric oxide/nano oxide hybridized wave absorbing material and preparation method therefor
  • Multi-walled carbon nanotube/ferroferric oxide/nano oxide hybridized wave absorbing material and preparation method therefor

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Experimental program
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Effect test

Embodiment 1

[0050] The method steps for the preparation of the multi-walled carbon nanotube / ferric oxide / nano oxide hybrid wave-absorbing material proposed by the present invention are as follows:

[0051] S1: Alkynylation of multi-walled carbon nanotubes

[0052] S11: with concentrated HNO 3 (commercially available, mass fraction 65%) oxidizes MWCNTs to obtain MWCNTs-COOH;

[0053] S12: MWCNTs-COOH and SOCl prepared in S11 2 Put it into the container, and add a magnetic stirrer, after ultrasonic dispersion for 10 minutes, reflux in an oil bath at 65°C for 18 hours, and remove SOCl by suction filtration 2 ;

[0054] S13: adding dichloromethane to the solid obtained by suction filtration in S12 to disperse it, then adding anhydrous triethylamine, sealing the container with a parafilm, and cooling it to 0° C. in an ice-water bath;

[0055] S14: Slowly add 3-butyn-2-ol dropwise to the solution of S13 within 60 minutes. After the dropwise addition, continue to react at 0°C for 80 minutes,...

Embodiment 2

[0086] The method steps for the preparation of the multi-walled carbon nanotube / ferric oxide / nano oxide hybrid wave-absorbing material proposed by the present invention are as follows:

[0087] S1: Alkynylation of multi-walled carbon nanotubes

[0088] S11: with concentrated HNO 3 Oxidize MWCNTs to produce MWCNTs-COOH;

[0089] S12: MWCNTs-COOH and SOCl prepared in S11 2 Put it into the container, and add a magnetic stirrer, after ultrasonic dispersion for 5 minutes, reflux in an oil bath at 60°C for 12 hours, and remove SOCl by suction filtration 2 ;

[0090] S13: add dichloromethane to the solid obtained by suction filtration in S12 to disperse it, then add anhydrous triethylamine, seal the device with a parafilm, put it in an ice-water bath and cool to 0°C;

[0091] S14: Slowly add 3-butyn-2-ol dropwise to the solution of S13 within 60 minutes. After the dropwise addition, continue to react at 0°C for 40 minutes, and then react at room temperature for 12 hours. After th...

Embodiment 3

[0121] The method steps for the preparation of the multi-walled carbon nanotube / ferric oxide / nano oxide hybrid wave-absorbing material proposed by the present invention are as follows:

[0122] S1: Alkynylation of multi-walled carbon nanotubes

[0123] S11: with concentrated HNO 3 Oxidize MWCNTs to produce MWCNTs-COOH;

[0124] S12: MWCNTs-COOH and SOCl prepared in S11 2 Put it into the container, and add a magnetic stirrer, after ultrasonic dispersion for 15 minutes, reflux in an oil bath at 70°C for 24 hours, and remove SOCl by suction filtration 2 ;

[0125] S13: add dichloromethane to the solid obtained by suction filtration in S12 to disperse it, then add anhydrous triethylamine, seal the device with a parafilm, put it in an ice-water bath and cool to 0°C;

[0126] S14: Slowly add 3-butyn-2-ol dropwise to the solution of S13 within 60 minutes. After the dropwise addition, continue to react at 0°C for 120 minutes, and then react at room temperature for 24 hours. After ...

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Abstract

The invention discloses a multi-walled carbon nanotube/ferroferric oxide/nano oxide hybridized wave absorbing material and a preparation method therefor. The preparation method comprises the steps: S1: subjecting multi-walled carbon nanotubes to alkynylation; S2: subjecting ferroferric oxide to alkynylation; S3: subjecting a nano oxide to azidation; and S4: adding the alkynylation modified carbonnanotubes, the alkynylation modified ferroferric oxide and the azidation modified oxide into a catalyst, ligand and organic solvent containing mixed system for a reaction in a nitrogen gas atmosphere,carrying out filtering after the reaction ends up, carrying out washing with deionized water and acetone, and carrying out vacuum drying, thereby obtaining the multi-walled carbon nanotube/ferroferric oxide/nano oxide hybridized wave absorbing material. The material prepared by the method is good in stability and low in density, shows a wave absorbing performance reinforcing effect and has relatively good microwave absorbing performance; and the preparation of the material employs a click chemical method, the operation is easy and feasible, noble-metal catalysis is not used, the economic benefit is good, and thus, the preparation method is applicable to industrial production.

Description

technical field [0001] The invention relates to the technical field of electromagnetic composite materials, in particular to a multi-walled carbon nanotube / ferric oxide / nano oxide hybrid absorbing material and a preparation method thereof. Background technique [0002] With the development of military stealth technology and the wide application of electronic equipment such as local area networks, computers, and mobile phones, the importance of microwave absorbing materials (abbreviated as absorbing materials) is increasing day by day. The research on microwave absorbing materials has an immeasurable role in both military and civilian applications, so more and more scholars from various countries attach great importance to them. At present, the prepared microwave absorbing materials still have problems such as narrow absorption frequency band, low absorption intensity, unsatisfactory physical comprehensive properties, complex preparation process and interface compatibility. ...

Claims

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Application Information

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IPC IPC(8): C09K3/00C01B32/168C01B33/18C01G49/08B82Y30/00B82Y40/00
CPCC09K3/00C01B32/168C01G49/08C01B33/18B82Y30/00B82Y40/00C01P2004/80
Inventor 吉小利马勖凯刘健
Owner ANHUI UNIV OF SCI & TECH
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