Graphitization multiwall carbon nanotube/nano-particle composite absorbing agent and preparation method thereof
A technology of multi-walled carbon nanotubes and nanoparticles, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems that cannot meet the requirements of high efficiency, light weight and broadband of wave-absorbing materials, poor wave-absorbing performance, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0043] The synthesis method of the graphitized multi-walled carbon nanotube / silver nanoparticle composite provided by the present invention can be realized through the following reaction steps:
[0044] (1) Using carboxylated and graphitized multi-walled carbon nanotubes as raw materials, disperse them in pure water by ultrasonication for 4 hours; the concentration of carbon nanotubes is 1 mg / mL.
[0045] (2) Add polyvinylpyrrolidone and silver nitrate to 400 mL of the above mixture, and continue to sonicate for 30 minutes; the mass of polyvinylpyrrolidone is 1.5 g, and the mass of silver nitrate is 0.07 g.
[0046] (3) Heat the above mixed solution to a slight boil of 96°C, add 20 mL of a pure aqueous solution of trisodium citrate to it, and continue the reaction at a slight boil; wherein the concentration of the trisodium citrate solution is 5 mg / mL, and the mixed solution reacts with a slight boil The time is 1.0h.
[0047] (4) After the above mixed solution is cooled to r...
Embodiment 2
[0049] The synthesis method of graphitized multi-walled carbon nanotube / nanoparticle composite wave absorbing agent provided by the present invention can be realized through the following reaction steps:
[0050] (1) The prepared graphitized multi-walled carbon nanotube / silver nanoparticle composite was sonicated for 2 hours, and dispersed in pure water; the concentration of the graphitized multi-walled carbon nanotube / silver nanoparticle composite was 1 mg / mL.
[0051] (2) Take 400 mL of the above dispersion liquid, add 4.2 mmol ferric chloride hexahydrate, 1.68 mmol ferrous chloride tetrahydrate and 0.42 mmol cobalt chloride hexahydrate to it, and continue ultrasonication for 30 min;
[0052] (3) Stir the system under the protection of a nitrogen atmosphere, raise the temperature to 70°C, add concentrated ammonia water (25-28% by mass) to the system until the pH is 10, and continue the reaction for 60 minutes. The product was recovered by magnetic separation, washed five tim...
Embodiment 3
[0054] As the application of the graphitized multi-walled carbon nanotube / nanoparticle composite wave absorbing agent prepared by the present invention, paraffin is used as a matrix to prepare test samples with different filling amounts of wave absorbing agents, which can be realized by the following steps:
[0055] (1) A certain mass of paraffin and graphitized multi-walled carbon nanotube / nanoparticle composite wave absorbing agent is dispersed by THF ultrasonically, so that the two are evenly mixed, and the mass percentage of the composite wave absorbing agent / (composite wave absorbing agent+paraffin wax) is 25%.
[0056] (2) Put the mixture in a vacuum oven at 60°C to dry and remove all THF, and press the mixture of graphitized multi-walled carbon nanotubes / nanoparticle composite wave absorbing agent and paraffin wax into a mold with an outer diameter of 7 mm, an inner diameter of 3 mm, and a thickness of 2mm ring.
[0057] (3) Use Agilent N5244A PNA-X to test the electro...
PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| size | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More