Carbon nano tube wave absorbtion mateirla of surface carried with magnetic alloy particle and preparation method thereof

A carbon nanotube and magnetic alloy technology, applied in nanostructure manufacturing, nanotechnology, nanotechnology and other directions, can solve the problems of low surface reactivity, large surface curvature, inability to design and assemble magnetic metal alloy coatings, etc. It is not easy to uniformly deposit on carbon nanotubes, and the preparation process is simple.

Inactive Publication Date: 2007-10-03
TSINGHUA UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the high degree of graphitization of carbon nanotubes, the surface reactivity is very low, and the diameter is nanoscale (about 5-50nm), the surface curvature is large, and it is difficult to use general coating methods su

Method used

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  • Carbon nano tube wave absorbtion mateirla of surface carried with magnetic alloy particle and preparation method thereof
  • Carbon nano tube wave absorbtion mateirla of surface carried with magnetic alloy particle and preparation method thereof
  • Carbon nano tube wave absorbtion mateirla of surface carried with magnetic alloy particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weighed 9.706 grams of analytically pure nickel sulfate and 6.780 grams of cobalt sulfate according to the weight ratio, and added 8.912 grams of trisodium citrate and 12 grams of ammonium chloride, and dissolved them in deionized water to form 200 milliliters of chemical plating solution. 0.2 grams of multi-walled carbon nanotubes were purified, activated, and sensitized according to the process in the preparation step 1, and then placed in the prepared chemical plating solution and mechanically stirred. Pour 50 ml of the additional reducing agent sodium hypophosphite (12.847 g) solution into it, then add ammonia water drop by drop with constant stirring until the pH value is about 8, and dilute to 300 ml. Under the condition of 70°C water bath, stir mechanically until the reaction is completed. After the electroless plating is completed, it is cleaned, filtered and dried. A NiCo nanomagnetic body / carbon nanotube composite material was obtained.

[0031] Disperse the...

Embodiment 2

[0033]Weighed 11.121 grams of analytically pure ferrous sulfate and 5.312 grams of nickel sulfate according to the weight ratio, and added 8.912 grams of trisodium citrate and 12 grams of ammonium chloride, and dissolved them in deionized water to form 200 milliliters of chemical plating solution. 0.2 grams of single-walled carbon nanotubes were purified, activated and sensitized according to the process in the preparation step 1, and then placed in the prepared chemical plating solution and mechanically stirred. Pour 50 ml of the additional reducing agent sodium hypophosphite (12.847 g) solution into it, then add ammonia water drop by drop with constant stirring until the pH value is about 8, and dilute to 300 ml. Under the condition of 70°C water bath, stir mechanically until the reaction is completed. After the electroless plating is completed, it is cleaned, filtered, and dried, and then placed in a protective atmosphere at 450°C (the argon flow in the mixed gas is 2000scc...

Embodiment 3

[0036] Weigh 3.370 grams of analytically pure ferrous sulfate, 11.866 grams of cobalt sulfate, and 1.601 grams of nickel sulfate according to the weight ratio, and add 8.912 grams of trisodium citrate and 12.000 grams of ammonium chloride, and dissolve them in deionized water to form a chemical Plating solution 200 ml. 0.2 grams of double-walled carbon nanotubes were purified, activated and sensitized according to the process in the preparation step 1, and then placed in the prepared chemical plating solution and mechanically stirred. Pour 50 ml of the solution of sodium hypophosphite (12.847 g) prepared separately, and then add ammonia water drop by drop with continuous stirring until the pH value is about 9, and dilute to the specified volume of 300 ml. Under the condition of 80°C water bath, stir mechanically until the reaction is completed. After the electroless plating is completed, it is cleaned, filtered, and dried, and then placed in a protective atmosphere at 450 ° C...

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Abstract

A carbon nanotube carrying magnetic alloy particles on its surface and used as wave absorbing material is prepared through uniformly dispersing carbon nanotubes in the solution of the sulfate of Fe, Co and Ni, and oxidizing-reducing reaction for deposition the magnetic alloy particles on carbon nanotubes.

Description

technical field [0001] The invention belongs to the field of preparation of electromagnetic wave absorbing materials, in particular to a carbon nanotube wave absorbing material with magnetic alloy particles loaded on the surface and a preparation method thereof. Background technique [0002] In modern warfare, stealth technology has become one of the cutting-edge military technologies in the world, and the research and application of radar wave absorbing materials (referred to as absorbing materials) is an important part of the development of stealth technology. In addition, with the development of information technology, various electronic devices are widely used, and electromagnetic wave radiation has become a new social hazard. Electromagnetic Interference (EMI) caused by electromagnetic wave radiation will not only affect the normal operation of various electronic devices, but also be harmful to human health. Absorbing materials can absorb electromagnetic radiation and ...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00G12B17/00
Inventor 顾家琳蔡道炎吕瑞涛王晨康飞宇
Owner TSINGHUA UNIV
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