Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of molybdenum diselenide and carbon nanotube composite wave-absorbing material

A carbon nanotube composite, carbon nanotube technology, applied in shielding materials, magnetic field/electric field shielding, antennas, etc., can solve the problems of low density of absorbing materials and high ferrite density, and achieve enhanced conductivity loss and The effect of polarization relaxation loss, low material density, and enhanced wave absorption

Active Publication Date: 2021-02-05
NANKAI UNIV
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The development of stealth technology has made the research on electromagnetic wave absorbing materials more and more urgent. Whether electromagnetic waves can effectively enter the absorbing material and achieve high absorption needs to meet the impedance matching and attenuation characteristics. According to the loss mechanism, absorbing materials can be divided into dielectric type and magnetic medium. Type, typical magnetic dielectric absorbing materials include ferrite, carbonyl iron and other materials, but the density of ferrite is relatively high, which cannot meet the low-density characteristics of absorbing materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of molybdenum diselenide and carbon nanotube composite wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] After ultrasonicating the mixed solution of 100mg carbon nanotubes and 100ml dilute nitric acid (30%) for 3h, filter and wash with deionized water until the solution is neutral, dry in vacuum at 50°C for 12h to obtain purified carbon nanotubes, then 100mg purified carbon nanotubes, 0.071mmol of ammonium molybdate tetrahydrate, 1mmol of potassium selenocyanate and 100mg of polyvinylpyrrolidone were added to a mixed solution of 80ml of ultrapure water and ethylene glycol, and were fully dissolved by ultrasonic and magnetic stirring for 60min.

[0027] Transfer the mixed solution to a 100ml polytetrafluoroethylene liner, put it into a stainless steel autoclave, and react at a high temperature of 200°C for 24 hours. After the reaction, wash the black product with deionized water and absolute ethanol for 3 times to remove impurities, and then vacuum 50 and drying at ℃ for 12 hours to obtain a composite material of molybdenum diselenide and carbon nanotubes.

[0028] Heat 6g ...

Embodiment 2

[0030] 200mg of carbon nanotubes and 200ml of dilute nitric acid (30%) mixed solution was sonicated for 3h, filtered and washed with deionized water until the solution was neutral, and dried in vacuum at 60°C for 12h to obtain purified carbon nanotubes, then 200mg of purified carbon nanotubes, 0.071mmol of ammonium molybdate tetrahydrate, 1mmol of potassium selenocyanate and 120mg of polyvinylpyrrolidone were added to a mixed solution of 80ml of ultrapure water and ethylene glycol, and were fully dissolved by ultrasonic and magnetic stirring for 60min.

[0031] Transfer the mixed solution to a 100ml polytetrafluoroethylene liner, put it into a stainless steel autoclave, and react at a high temperature of 210°C for 22 hours. After the reaction, wash the black product 3 times with deionized water and absolute ethanol to remove impurities, and then vacuum 50 and drying at ℃ for 12 hours to obtain a composite material of molybdenum diselenide and carbon nanotubes.

[0032] Heat 4....

Embodiment 3

[0034] 300mg of carbon nanotubes and 300ml of dilute nitric acid (30%) mixed solution was sonicated for 4h, then filtered and washed with deionized water until the solution was neutral, dried in vacuum at 50°C for 16h to obtain purified carbon nanotubes, and then 300mg of purified carbon nanotubes, 0.143mmol of ammonium molybdate tetrahydrate, 2mmol of potassium selenocyanate and 200mg of polyvinylpyrrolidone were added to a mixed solution of 100ml of ultrapure water and ethylene glycol, and were fully dissolved by ultrasonic and magnetic stirring for 60 minutes.

[0035] Transfer the mixed solution to a 120ml polytetrafluoroethylene liner, put it into a stainless steel autoclave, and react at a high temperature of 210°C for 24 hours. After the reaction, wash the black product with deionized water and absolute ethanol for 3 times to remove impurities, and then vacuum 60 and drying at ℃ for 24 hours to obtain a composite material of molybdenum diselenide and carbon nanotubes.

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a molybdenum diselenide and carbon nanotube composite wave-absorbing material, which comprises the following steps of fully dissolving purified carbon nanotubes, potassium selenide and ammonium molybdate tetrahydrate in water and ethylene glycol, adding into a stainless steel high-pressure reaction kettle, preparing a molybdenum diselenide and carbonnanotube composite material by a one-step solvothermal method, and by hot melting on epoxy resin, mixing with the composite material, and cooling to obtain the molybdenum diselenide and carbon nanotube composite wave-absorbing material. The method is simple in preparation process and low in experimental cost, and the prepared wave-absorbing material is small in density, light in weight, wide in wave-absorbing frequency band and high in wave-absorbing performance, can be used as a light wave-absorbing structure material, a wave-absorbing coating, a wave-absorbing filling material and the like,and can be widely applied to the fields of electromagnetic wave absorption, stealth technology, electromagnetic shielding and the like.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a method for preparing a composite wave-absorbing material of molybdenum diselenide and carbon nanotubes. Background technique [0002] The development of stealth technology has made the research on electromagnetic wave absorbing materials more and more urgent. Whether electromagnetic waves can effectively enter the absorbing material and achieve high absorption needs to meet the impedance matching and attenuation characteristics. According to the loss mechanism, absorbing materials can be divided into dielectric type and magnetic medium. Type, typical magnetic dielectric absorbing materials include ferrite, carbonyl iron and other materials, but the density of ferrite is relatively high, which cannot meet the low-density characteristics of absorbing materials. [0003] The invention proposes a molybdenum diselenide and carbon nanotube composite wave-absorbing material bas...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L63/00C08K3/04C08K3/30C08K7/00H01Q17/00H05K9/00
CPCC08K3/041C08K3/30C08K7/00H01Q17/00H05K9/0073C08K2201/011C08L63/00
Inventor 匡登峰刘刚铄
Owner NANKAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com