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Hollow carbon nano-particles and wave-absorbing material prepared therefrom

A carbon nanoparticle and wave absorbing material technology, applied in the field of wave absorbing materials, can solve the problems of unable to achieve mass production, unable to achieve mass production of pollutants, unable to achieve green and pollution-free, and achieve low density, reduce quality, and improve absorption. The effect of wave performance

Active Publication Date: 2017-11-07
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the use of graphene to prepare electromagnetic absorbing materials is mainly through oxidation-reduction methods, chemical vapor deposition (CVD) and other methods. However, this method has the disadvantages of being unable to achieve mass production or producing a large amount of pollutants during the preparation process. Green and pollution-free requirements, and mass production cannot be achieved in industry

Method used

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  • Hollow carbon nano-particles and wave-absorbing material prepared therefrom
  • Hollow carbon nano-particles and wave-absorbing material prepared therefrom
  • Hollow carbon nano-particles and wave-absorbing material prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment provides a method for preparing hollow carbon nanoparticles, the method comprising the following steps:

[0055] Add 0.76mL of aniline, 0.58mL of pyrrole and 0.06g of non-ionic surfactant Triton X-100 into 120mL of deionized water, stir for 0.5h, sonicate for 0.5h, and then ice-bath for 0.5h to form a clear and transparent solution (this solution is denoted as the first solution); wherein, the temperature of the ice bath is 0°C.

[0056] Dissolve 3.8g of ammonium persulfate in 30mL of deionized water to make an ammonium persulfate solution, and put it in an ice bath for 0.5h (the temperature of the ice bath is 0°C); then add it to the above first solution at one time, when adding, This was added with stirring for about 30 seconds to obtain a second solution.

[0057] React the above second solution at 0°C for 12 hours. After the reaction, use a vacuum filtration device to wash the reacted solution with ethanol solution (ethanol: water = 1:3, volume rati...

Embodiment 2

[0061] This embodiment provides a kind of wave-absorbing material, and the preparation process of this wave-absorbing material is as follows:

[0062] Preparation of graphene powder

[0063] At room temperature and normal pressure, 100 g of flake graphite and metal balls for ball milling were put into a ball mill jar, and ball milled for 96 hours to obtain a sample in which graphite flakes were exfoliated into graphene powder. The TEM image of the graphene powder is as follows figure 2 As shown, it can be seen from the figure that the number of layers is relatively small, about 8 layers. The Raman spectrum of the graphene powder is as follows image 3 As shown, it can be seen that there are obvious D peaks, indicating that there are many defects in graphene products.

[0064] Preparation of absorbing materials

[0065] The graphene powder obtained above, the hollow carbon nanoparticles provided in Example 1, and polypropylene are added to the torque rheometer according to...

Embodiment 3

[0069] This embodiment provides a kind of wave-absorbing material, and the preparation process of this wave-absorbing material is as follows:

[0070] Preparation of graphene powder

[0071] At room temperature and normal pressure, 10 g of graphite flakes and metal balls for ball milling were put into a ball mill jar, and ball milled for 48 hours to obtain a sample in which graphite flakes were exfoliated into graphene powder.

[0072] Preparation of absorbing materials

[0073] The graphene powder obtained above, the hollow carbon nanoparticles provided in Example 1, and polypropylene are added to the torque rheometer according to the mass ratio of 1:4:19, at 220 ° C, 30r / min Banburying 10min under the condition (the rotating speed of banburying and time and temperature are inversely correlated. The higher the temperature, the smaller the viscosity of the mixture, the smaller the required rotating speed and time), to obtain the mixture;

[0074] The above mixture was hot-pr...

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Abstract

The invention provides hollow carbon nano-particles and a wave-absorbing material prepared therefrom. A preparation method of the hollow carbon nano-particles comprises the steps of mixing aniline, pyrrole, a non-ionic surface active agent and water to obtain a first solution; carrying out ice bath on an ammonium persulfate solution and adding the ammonium persulfate solution to the first solution to obtain a second solution; reacting the second solution, carrying out suction filtration, washing and freeze drying to obtain a head product; and carrying out carbonization treatment on the head product to obtain the hollow carbon nano-particles. A preparation method of the wave-absorbing material comprises the steps of adding graphene, the hollow carbon nano-particles and polypropylene to a torque rheometer for banburying to obtain a mixture; and carrying out hot pressing and cold pressing on the mixture to obtain the wave-absorbing material. By adopting the graphene and the hollow carbon nano-particles as wave-absorbing media and polypropylene as a carrier, the prepared wave-absorbing material can reach the effective absorption effect on an electromagnetic wave, and meanwhile, a series of advantages of low density and fatigue resistance of the polypropylene material are also integrated.

Description

technical field [0001] The invention relates to a hollow carbon nano particle and a wave-absorbing material prepared therefrom, belonging to the technical field of polymer composite materials. Background technique [0002] Absorbing material refers to a material that can absorb and attenuate incident electromagnetic waves, and convert the incident electromagnetic energy into heat energy to dissipate or make electromagnetic waves disappear due to interference. It is an important functional material. It is used in electronic products, stealth technology , Microwave communication, microwave anechoic chamber, anti-electromagnetic radiation and prevention of electromagnetic pollution have been widely used. Therefore, the development of absorbing materials is very important. [0003] In recent years, the demand for absorbing materials has been increasing, and the role and status of electromagnetic wave absorbing materials have become more and more prominent. Traditional magnetic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 李永峰周陈
Owner PETROCHINA CO LTD
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