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A graphene/fe/fe3o4 composite material with integrated functions of heat conduction and wave absorption and its preparation method

A graphene and functional technology, which is applied in the field of graphene/Fe/Fe3O4 composite materials and their preparation, can solve the problems of mutual restraint between thermal conductivity and wave absorption, and it is difficult to take into account simultaneously, and achieves the synergistic enhancement of thermal conductivity and wave absorption, and the internal structure Stable and large specific surface area

Active Publication Date: 2022-04-22
牛墨石墨烯应用科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the main problem existing in the current heat-conducting and absorbing integrated materials is that the heat-conducting and absorbing properties are mutually restrained, and it is difficult to take care of them at the same time.

Method used

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  • A graphene/fe/fe3o4 composite material with integrated functions of heat conduction and wave absorption and its preparation method
  • A graphene/fe/fe3o4 composite material with integrated functions of heat conduction and wave absorption and its preparation method
  • A graphene/fe/fe3o4 composite material with integrated functions of heat conduction and wave absorption and its preparation method

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Embodiment 1

[0033] This embodiment discloses a graphene / Fe / Fe with integrated functions of heat conduction and wave absorption3 o 4 Composite material, specific components and mass parts are shown in Table 1;

[0034] Concrete preparation method comprises the following steps:

[0035] Step 1. Load with Fe 3 o 4 Nanoparticles of carbon nanotubes and Fe nanoparticles, dimethylformamide, n-butanol, N-methylpyrrolidone and sodium carboxymethylcellulose are mixed and ultrasonically uniformly dispersed; the specific dosage of the above raw materials is shown in the table 1 shown;

[0036] Step 2. Add the graphite powder in the mass fraction to the uniform dispersion system obtained in step 1. Under the action of ultrasound, the graphite is gradually layered. As the gap between the graphite layers gradually increases, Fe is loaded. 3 o 4 The carbon nanotubes and Fe nanoparticles of the nanoparticles enter the graphite interlayer gap with the liquid of the system until the graphite is exfoli...

Embodiment 2

[0045] The main difference between this embodiment and embodiment 1 is: Fe 3 o 4 Nanoparticles and carbon nanotubes are combined with graphene and Fe nanoparticles by hydrothermal method, and the specific dosage of each raw material is shown in Table 1.

Embodiment 3

[0047] The main difference between this embodiment and embodiment 1 is: Fe 3 o 4 Nanoparticles and carbon nanotubes are combined with graphene and Fe nanoparticles by hydrothermal method, and the specific dosage of each raw material is shown in Table 1. ,

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Abstract

The invention discloses a graphene / Fe / Fe with integrated functions of heat conduction and wave absorption 3 o 4 Composite material, the material through graphene and Fe and Fe 3 o 4 Composite, the internal structure is stable after film formation, the specific surface area is large, and the heat conduction and wave absorption are synergistically enhanced; the invention also discloses the preparation method of the composite material, which includes the following steps: Step 1, after the components of the raw materials are mixed, they are ultrasonically dispersed System; step 2, uniformly dispersing the graphite powder of the mass fraction under the action of ultrasound and exfoliating it into graphene; step 3, removing part of N-methylpyrrolidone to obtain a material slurry with suitable viscosity; vacuum and low-temperature drying to obtain a target composite material ; The material through graphene and Fe and Fe 3 o 4 Composite, the internal structure is stable after film formation, the specific surface area is large, and the heat conduction and wave absorption are synergistically enhanced.

Description

technical field [0001] The invention relates to the technical field of heat-conducting and wave-absorbing materials, in particular to a graphene / Fe / Fe material with integrated functions of heat conduction and wave-absorbing 3 o 4 Composite materials and methods for their preparation. Background technique [0002] Heat conduction-absorbing integrated materials can not only conduct heat, but also effectively absorb and attenuate incident electromagnetic wave energy, and play a huge role in the fields of weapon stealth, human body and electronic product protection. Thermal conduction-absorbing integrated materials have been applied abroad, but in China, thermal conduction materials and microwave-absorbing materials are mainly studied and used independently. The integrated material is less and the performance is poor. For example, Shao Bo et al. have studied the heat conduction and wave absorption properties of barium ferrite / graphene heat conduction and wave absorption compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/14B82Y30/00
CPCC09K5/14B82Y30/00
Inventor 陈大波
Owner 牛墨石墨烯应用科技有限公司