Method for preparing reduced oxidized graphite/nano nickel composite wave-absorbing material by using gamma ray

A composite wave absorbing material, γ-ray technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high preparation cost, complex preparation process, harsh conditions, etc., to achieve stable product quality, simple implementation method, and reaction mild conditions

Active Publication Date: 2014-05-14
TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the technical problems of high preparation cost, harsh conditions and complex preparation process in the existing method for preparing reduced graphite oxide / nano-nickel composite materials, thereby providing a method for preparing reduced graphite oxide / nano-nickel composite materials by using gamma rays. The method of absorbing materials

Method used

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  • Method for preparing reduced oxidized graphite/nano nickel composite wave-absorbing material by using gamma ray
  • Method for preparing reduced oxidized graphite/nano nickel composite wave-absorbing material by using gamma ray
  • Method for preparing reduced oxidized graphite/nano nickel composite wave-absorbing material by using gamma ray

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specific Embodiment approach 1

[0020] Specific implementation mode one: A method for preparing reduced graphite oxide / nano-nickel composite wave-absorbing material using gamma rays in this embodiment is carried out according to the following steps:

[0021] 1. Preparation of graphite oxide: adopt the closed oxidation method to prepare graphite oxide by oxidation reaction with natural flake graphite as raw material;

[0022] 2. Mix the graphite oxide prepared in step 1 with nickel salt, and then ultrasonically disperse it in deionized water to obtain a mixed solution; wherein, the mass ratio of graphite oxide and nickel salt in the mixed solution is 1: (1.2-10), and the mixed solution The concentration of graphite oxide is 1-5g / L;

[0023] 3. Add isopropanol dropwise to the mixed solution obtained in step 2, and then react under γ-ray irradiation to obtain the product; wherein, the volume ratio of the mixed solution to isopropanol is 1: (0.1~0.4), and the The dose of gamma rays mentioned above is 10-20KGy / h...

specific Embodiment approach 2

[0029] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in the step one, adopt the airtight oxidation method to carry out oxidation reaction and prepare the method for graphite oxide with natural flake graphite as raw material:

[0030] 1. Add 1g of natural flake graphite, 3g of potassium permanganate, and 30mL of concentrated sulfuric acid with a mass concentration of 98% to the stainless steel reaction kettle, seal it and place it at a temperature of 1-2°C for 2h, and react at a temperature of 80°C for 1.5 h, to obtain the reaction solution;

[0031] 2. Transfer the reaction solution in step 1 into 500mL of distilled water, add 100mL of 30% hydrogen peroxide, continue to stir, settle, wash until the solution is neutral, and dry at 60°C to complete the preparation of graphite oxide. Other parameters and steps are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the nickel salt in step 2 is nickel acetate hexahydrate or nickel chloride. Other parameters and steps are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing a reduced oxidized graphite / nano nickel composite wave-absorbing material by using gamma ray and relates to a method for preparing the reduced oxidized graphite / nano nickel composite wave-absorbing material, for solving such technical problems of the conventional method for preparing the reduced oxidized graphite / nano nickel composite wave-absorbing material as high preparation cost, complicated preparation process and high reaction temperature. The preparation method comprises the following steps: 1, preparing graphite oxide, 2, preparing a mixture solution, 3, reacting under the radiation of gamma ray to obtain a product, and 4, filtering, separating, washing and drying the product so as to obtain the reduced oxidized graphite / nano nickel composite wave-absorbing material. The reaction in the method is performed at normal temperature and normal pressure, and the method is gentle in reaction condition, low in preparation cost, simple in application method and particularly applicable to large-scale production of the material. The method is applied to the field of preparation of the reduced oxidized graphite / nano nickel composite wave-absorbing material.

Description

technical field [0001] The invention relates to a method for preparing reduced graphite oxide / nano-nickel composite wave-absorbing material. Background technique [0002] The rapid development of electronic technology has promoted the popularization and application of electronic equipment. While enjoying the convenience of electronic products, people are also in the ocean of electromagnetic waves. Absorbing materials that can effectively absorb electromagnetic radiation have become a research hotspot in recent years. The research and development of absorbing materials with good performance has great practical value for military and civilian applications. [0003] The earliest ferrite absorbing material has the characteristics of high absorption efficiency, relatively wide frequency band, and low cost, but its absorbing frequency cannot be tuned, and its high temperature characteristics are poor, especially its high density affects its use effect. Therefore, researchers at h...

Claims

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Application Information

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IPC IPC(8): C09K3/00
Inventor 赵弘韬徐平李志刚杜耘辰张楠张丽芳
Owner TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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