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Preparation method of iron-coated graphene nanocomposite material

A nanocomposite material and graphene technology, which is applied in the field of preparation of iron-coated graphene nanocomposite materials, can solve the problems of inability to realize carbon nanomaterial/metal interface transfer, difficult to achieve performance enhancement, serious agglomeration, etc., and achieve product realization. Function refinement, preparation method and effects of simple materials and low preparation cost

Inactive Publication Date: 2012-07-25
NANJING UNIV
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Problems solved by technology

[0003] Through theoretical calculations (International Journal of Plasticity 2011, No. 27, p. 539), we know that carbon nanomaterials, as the reinforcing phase of metal matrix composites, can improve the elastic stiffness and yield strength of materials. Agglomeration phenomenon, making the theoretically predicted performance enhancement difficult to achieve
In order to improve the performance, Kim et al. (Compos.Sci.Eng 2006, No. 430, page 27) carried out high-energy ball milling and sintering process on the mixture of carbon nanomaterials and metal copper nanopowders, and the obtained samples realized to a certain extent However, there is still serious agglomeration, and the additional process is easy to introduce impurities or cause oxidation of the matrix, and cannot achieve good transfer on the carbon nanomaterial / metal interface. Therefore, in the development of metal matrix / carbon nanocomposites , the uniform dispersion of carbon nanomaterials in the metal matrix and the surface coverage are important issues to be solved in future research

Method used

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  • Preparation method of iron-coated graphene nanocomposite material
  • Preparation method of iron-coated graphene nanocomposite material
  • Preparation method of iron-coated graphene nanocomposite material

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Embodiment 1

[0028] Take 20 mg of graphite oxide and put it in a crucible, wrap it with tin foil paper, push it into a tube furnace at 300°C (500°C or 600°C, the time is shorter) for 3min thermal expansion treatment, and the obtained multilayer graphite Add 100 mg of alkene and 500 ml of kerosene into a four-necked flask, and the four-necked flask is respectively connected with a condenser, a temperature controller, a mechanical stirrer, and an air inlet pipe. Nitrogen was introduced for 10 minutes to remove the air, and under the condition of stirring speed of 180r / min, the kerosene solution was slowly heated to 220°C with an electric heating mantle for condensation and reflux. Use N 2 As a guide gas, lead carbonyl iron vapor into kerosene (gasoline or isopropanol) solution for decomposition, N 2 The flow rate was 120ml / min, and the reaction lasted 180min. in N 2 The temperature was gradually lowered and cooled under protection, and the sample was magnetically separated, washed three t...

Embodiment 2

[0035] Take 20 mg of graphite oxide and put it in a crucible, wrap it with tinfoil, push it into a tube furnace at 500 ° C for 5 minutes of thermal expansion treatment, and obtain multilayer graphene. Add 100 mg of multilayer graphene and 500 ml of kerosene into a four-necked flask, The four-necked flask was connected with a condenser, a temperature controller, a mechanical stirrer, and an inlet pipe respectively. Nitrogen (N 2 ) for 10 minutes, and under the condition of a stirring speed of 180r / min, use an electric heating mantle to slowly heat the kerosene solution to 240°C for condensation and reflux. Use N 2 As a guide gas, lead iron pentacarbonyl vapor into the kerosene solution for decomposition, N 2 The flow rate was 120ml / min, and the reaction lasted 360min. in N 2 Gradually cool down under protection. The sample was magnetically separated, washed three times with n-octane, acetone, and absolute ethanol in sequence, and dried at 60 °C under nitrogen protection. T...

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Abstract

A preparation method of an iron-coated graphene nanocomposite material comprises the following steps: (1) conducting thermal-expansion stripping on graphite oxide under a high temperature to obtain multi-layer graphene; (2) putting the multi-layer graphene and an organic solvent into a four-mouth flask, and mechanically stirring and mixing uniformly; (3) introducing pentacarbonyl iron steam into the mixed solution for thermal decomposition under a continuously stirring protection atmosphere; (4) conducting the thermal decomposition in a reflux condensation process; and (5) after the reaction,cooling to room temperature under the nitrogen protection, separating a product by a magnet, then cleaning the product by adopting an organic solvent, and drying the product under the nitrogen protection to obtain the iron-coated graphene nanocomposite material. According to the preparation method, Fe nanoparticles with a size of 20-50nm can be coated on the graphene sheet layers uniformly, the process is simple and controllable, the cost is low, and the industrial production is facilitated.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, and in particular relates to a preparation method of iron-coated graphene nanocomposite materials. Background technique [0002] The research on functional iron-based / carbon nanomaterial composites mainly focuses on magnetic fluid, biomedicine and catalysis. The composite form is nano-ferromagnetic metal coated or loaded with carbon nanomaterials. A.A.EI-Gendy et al. (Crabon 2009, No. 47, p. 2821) used chemical vapor deposition to decompose metal (iron-cobalt-nickel) compound to obtain a nanocomposite material with a core-shell structure, and its magnetic properties studied. Morjan et al. (Advanced Powder Technology No. 23, No. 2012, page 88) used laser synthesis method to use iron pentacarbonyl and acetylene gas as chemical raw materials of iron and carbon respectively, and obtained α-iron nanoparticles covered by graphite layer. The composite material can effectively prevent the oxidati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C23C16/16C01B32/192
Inventor 张豹山黄琪惠唐东明杨燚
Owner NANJING UNIV
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