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cu 2 o/mwcnts composite materials, preparation methods and electromagnetic wave absorption applications

A composite material and composite material technology, applied in the field of Cu2O/MWCNTs composite material and its preparation, can solve the problems of organic solvent pollution, complicated treatment process, high equipment requirements, etc., achieve excellent microwave absorption performance, simple and convenient preparation method, and simple effect

Active Publication Date: 2020-05-22
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the Chinese invention patent whose application number is CN201310436145.1 discloses a method for ultrasonically preparing carbon / graphene-supported cuprous oxide nanoscale structure hybrid materials, but in this method, reduced graphene (rGO), pyrene derivatives Reaction with divalent copper salt in an organic solvent, the operation is more complicated, and the organic solvent pollutes the environment at the same time
Another example is that the Chinese invention patent with the application number CN201110459158.1 discloses a method for preparing a copper / carbon nanotube composite superhydrophobic material. The hydrophobic material prepared by this method has high thermal conductivity, high electrical conductivity, and superhydrophobic properties, but The processing process is more complicated, and requires high temperature, high pressure conditions, and higher equipment requirements
[0008] Therefore, there are few reports on how to prepare cuprous oxide / carbon composite materials simply and conveniently, especially the preparation of cuprous oxide / carbon nanotube composite materials and their application in microwave absorption performance.

Method used

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  • cu <sub>2</sub> o/mwcnts composite materials, preparation methods and electromagnetic wave absorption applications
  • cu <sub>2</sub> o/mwcnts composite materials, preparation methods and electromagnetic wave absorption applications
  • cu <sub>2</sub> o/mwcnts composite materials, preparation methods and electromagnetic wave absorption applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] a Cu 2 O / MWCNTs composite material, the Cu in the composite material 2 O nanoparticles grow disorderly inside and on the surface of MWCNTs.

[0049] The preparation method of Cu2O / MWCNTs composite material: the method steps are as follows:

[0050] 1) Pretreatment of porous-walled carbon nanotubes: Add MWCNTs and concentrated nitric acid sequentially into a 250mL three-necked flask. MWCNTs acidified with concentrated nitric acid;

[0051] 2) Cu 2 Preparation of O / MWCNTs composites: Add MWCNTs to distilled water, ultrasonically disperse for 1 h, and then add CuSO 4 ·5H 2 O and PEG, magnetically stirred until completely dissolved; placed in an ultrasonic reactor and sonicated until the reaction system mixture changed from blue to black, titrated the reacted mixed solution with sodium hydroxide solution to PH = 11, and then magnetically stirred After the reaction, ethanol and distilled water were added to wash several times to obtain solid black particles, and the co...

Embodiment 2

[0065] Cu2 The preparation method of O / MWCNTs composite material: method steps are as follows:

[0066] 1) Pretreatment of porous-walled carbon nanotubes: Add MWCNTs and concentrated nitric acid sequentially into a 250mL three-necked flask. MWCNTs acidified with concentrated nitric acid;

[0067] 2) Cu 2 Preparation of O / MWCNTs composites: Add MWCNTs to distilled water, ultrasonically disperse for 1 h, and then add CuSO 4 ·5H 2 O and PEG, magnetically stirred until completely dissolved; placed in an ultrasonic reactor and sonicated until the reaction system mixture changed from blue to black, titrated the reacted mixed solution with sodium hydroxide solution to PH = 11, and then magnetically stirred After the reaction, ethanol and distilled water were added to wash several times to obtain solid black particles, and the collected solid black particles were dried in an oven at 60°C for 12 hours, and then the obtained flake samples were put into a tube furnace under Calcining...

Embodiment 3

[0075] a Cu 2 O / MWCNTs composite material, the Cu in the composite material 2 O nanoparticles grow disorderly inside the MWCNTs.

[0076] Cu as claimed in claim 1 2 The preparation method of O / MWCNTs composite material: method steps are as follows:

[0077] 1) Pretreatment of porous-walled carbon nanotubes: Add MWCNTs and concentrated nitric acid sequentially into a 250mL three-necked flask. MWCNTs acidified with concentrated nitric acid;

[0078] 2) Cu 2 Preparation of O / MWCNTs composites: Add MWCNTs to distilled water, ultrasonically disperse for 1 h, and then add CuSO 4 ·5H 2 O and PEG, magnetically stirred until completely dissolved; placed in an ultrasonic reactor and sonicated until the reaction system mixture changed from blue to black, titrated the reacted mixed solution with sodium hydroxide solution to PH = 11, and then magnetically stirred After the reaction, ethanol and distilled water were added to wash several times to obtain solid black particles, and the...

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Abstract

The invention discloses a Cu2O / multi-walled carbon nanotubes (MWCNTs) composite material, a preparation method thereof and electromagnetic absorption application. The Cu2O / MWCNTs composite material is synthesized by a simple chemical method, and Cu2O nanoparticles are disorderly grown on surfaces of the MWCNTs and in the MWCNTs. A hydrothermal method is employed, no any surfactant is added, a traditional electroplating or chemical plating method is prevented, pollution is relatively small, the preparation method is simple, green and environmental-friendly, reaction is easy to control, expensive equipment is not needed, and the preparation method can be used for industrial production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a Cu 2 O / MWCNTs composite materials and their preparation methods and applications. Background technique [0002] In recent years, with the rapid development of the electronics industry, electromagnetic pollution has become increasingly serious, and absorbing materials have played a vital role in the field of electromagnetic pollution protection. At the same time, absorbing materials also play an extremely important role in the fields of realizing radar stealth of military equipment, reducing electromagnetic interference, and ensuring information security. Absorbing materials (microwave absorbing materials, electromagnetic wave attenuating materials or radar stealth materials) can effectively reduce the reflection of electromagnetic waves on the surface of objects, and at the same time effectively attenuate the electromagnetic waves incident into the material. Based on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00C01B32/168C01G3/02
CPCC01G3/02C01P2002/72C01P2002/85C01P2004/03C01P2004/04H05K9/0081
Inventor 高圣涛邢宏龙
Owner ANHUI UNIV OF SCI & TECH
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