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Iron-nickel alloy nanocluster-graphene composite material and preparation method and application thereof

A technology of iron-nickel alloys and composite materials, applied in nanotechnology, metal processing equipment, chemical instruments and methods, etc., can solve the problems of easy agglomeration and oxidation of iron-nickel alloy nanoclusters

Inactive Publication Date: 2016-08-03
BEIJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this, the present invention discloses an iron-nickel alloy nanocluster-graphene composite material, its preparation method and application, which are used to solve the problem that small-sized iron-nickel alloy nanoclusters are easy to agglomerate and oxidize in air

Method used

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  • Iron-nickel alloy nanocluster-graphene composite material and preparation method and application thereof
  • Iron-nickel alloy nanocluster-graphene composite material and preparation method and application thereof
  • Iron-nickel alloy nanocluster-graphene composite material and preparation method and application thereof

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Embodiment 1

[0059] Weigh 40mg of graphite oxide and 40mL of N-methylpyrrolidone in a 50mL beaker, ultrasonically disperse for about 2 hours to obtain a brown mixed solution; and 2g of octadecylamine were added to the above brown solution, the mixture was first heated to 120°C and maintained at this temperature for 30min, then raised to 202°C and maintained at this temperature for 2h, the entire reaction process was carried out under the protection of argon, and Magnetic stirring was maintained at all times. Then, 20 mL of ethanol was added to quench the reaction, and the temperature of the reaction system was rapidly lowered to room temperature. Finally, the reaction product was separated by centrifugation, washed alternately with n-hexane and acetone, and the product was vacuum-dried at 40°C.

Embodiment 2

[0061] Weigh 40 mg of graphite oxide and 50 mL of oleylamine in a 100 mL beaker, and ultrasonically disperse for about 2 hours to obtain a brown mixed solution; next, 159 mg (0.45 mmol) of iron acetylacetonate, 257 mg (1 mmol) of nickel acetylacetonate and 1.6 g of octadecyl The amine was added to the above brown solution, the mixture was first heated to 100°C and maintained at this temperature for 50 minutes, then raised to 290°C and maintained at this temperature for 5 hours, the whole reaction process was carried out under the protection of nitrogen, and magnetic stirring was maintained. Then, 20 mL of ethanol was added to quench the reaction, and the temperature of the reaction system was rapidly lowered to room temperature. Finally, the reaction product was separated by filtration, washed alternately with n-hexane and acetone, and the product was vacuum-dried at 40°C.

Embodiment 3

[0063] Weigh 40mg of graphite oxide and 34mL of 2-pyrrolidone in a 50mL beaker, and ultrasonically disperse for about 2h to obtain a brown mixed solution; Add octaamine to the above brown solution, first heat the mixture to 150°C and maintain this temperature for 20 minutes, then increase the temperature to 245°C, and maintain this temperature for 1 hour. The whole reaction process is carried out under the protection of argon, and the magnetic force is kept Stir. Then, 20 mL of ethanol was added to quench the reaction, and the temperature of the reaction system was rapidly lowered to room temperature. Finally, the reaction product was separated by centrifugation, washed alternately with n-hexane and acetone, and the product was vacuum-dried at 40°C.

[0064] In order to better analyze the iron-nickel alloy nanocluster-graphene composite material prepared in the embodiment, the embodiment of the present invention also prepared graphene, and the preparation method is as follows...

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Abstract

The embodiment of the invention discloses a method for preparing an iron-nickel alloy nanocluster-graphene composite material. The method includes the following steps that (1), graphite oxide is added into a first organic solvent to be dispersed; (2), ferric acetylacetonate, nickel acetylacetonate and octadecylamine are added, the mixture is heated to 100 DEG C to 150 DEG C in inertia protective gas, the temperature is kept for 20 min to 50 min, and then the temperature rises till a solution is boiled and flows back, and is kept for 1 h to 5 h; and (3), a second organic solvent is added to suddenly stop the reaction, and reaction products are separated out, washed and dried. The invention further discloses the iron-nickel alloy nanocluster-graphene composite material prepared through the method, and application of the composite material to electromagnetic wave absorption. According to the method, the iron-nickel alloy nanocluster-graphene composite material and the application, graphene is used as a substrate, the iron-nickel alloy nanocluster-graphene composite material is obtained through one-step reduction of a thermal decomposition method, and therefore iron-nickel alloy nanoparticles are protected and dispersed, and the nanometer composite material good in wave absorbing property is obtained.

Description

technical field [0001] The invention relates to the field of electromagnetic wave absorbing materials, in particular to an iron-nickel alloy nano-cluster-graphene composite material, a preparation method and application thereof. Background technique [0002] With the development of electronic communication technology, the harm caused by electromagnetic waves in people's daily life is becoming more and more prominent. Therefore, electromagnetic wave absorbing materials with excellent wave absorbing performance are required. [0003] As a typical alloy soft magnetic material, iron-nickel alloy has both excellent magnetic properties of metal monomers, high saturation magnetic susceptibility and low coercive force, and shows large magnetic anisotropy, so small-sized iron Nickel alloy nanoclusters are expected to obtain strong electromagnetic properties. However, small-sized iron-nickel alloy nanoclusters are easy to agglomerate and oxidize in the air, forming antiferromagnetic ...

Claims

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Application Information

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IPC IPC(8): B22F9/30C09K3/00B82Y40/00
CPCC09K3/00B82Y40/00B22F9/30B22F1/07
Inventor 孙根班马腾杨燕马淑兰
Owner BEIJING NORMAL UNIVERSITY
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