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Nano composite material integrating heat conduction and wave absorption and preparation method thereof

A technology of nano-composite materials and wave-absorbing fillers is applied in the field of nano-composite materials and their preparation, and achieves the effects of great scientific significance, great practical application value, and simple process operation.

Active Publication Date: 2021-12-10
QINGHAI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to combine the excellent thermal conductivity of BN with traditional two-dimensional wave-absorbing fillers to prepare heat-conducting and wave-absorbing integrated materials is still a technical difficulty in this field.

Method used

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  • Nano composite material integrating heat conduction and wave absorption and preparation method thereof
  • Nano composite material integrating heat conduction and wave absorption and preparation method thereof
  • Nano composite material integrating heat conduction and wave absorption and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A method for preparing a nanocomposite material integrating heat conduction and wave absorption, specifically comprising the following steps:

[0021] Step 1: Weigh 1.0 g of titanium carbide obtained by hydrofluoric acid etching, add 150 mL of deionized water, and ultrasonically disperse for 1 to 2 hours at 60 ° C, and the mixed solution is set aside;

[0022] Step 2: Take 1.0 g of boric acid and 6.0 g of urea and add them all to the above mixed solution, and stir and dry the mixed solution at 80° C. until the mixed solution is completely dried to obtain dry solid powder;

[0023] Step 3: Transfer the dry solid powder obtained above to a porcelain boat and place it in a closed tube furnace, vacuumize and replace with argon three times, then start the reaction at a heating rate of 5°C / min, and control the pressure of the closed tube furnace system 0.2MPa, until the system temperature reaches 900°C, keep it for 3 hours, then continue to increase the temperature at 1°C / min...

Embodiment 2

[0025] A method for preparing a nanocomposite material integrating heat conduction and wave absorption, specifically comprising the following steps:

[0026] Step 1: Weigh 0.8g of molybdenum disulfide nanosheets prepared by the conventional hydrothermal method, add 150mL of deionized water, and disperse ultrasonically for 1 to 2 hours at 60°C, and prepare the mixed solution for later use;

[0027] Step 2: Take 1.0 g of boric acid and 5.0 g of urea and add them all to the above mixed solution, and stir and dry the mixed solution at 80° C. until the mixed solution is completely dried to obtain dry solid powder;

[0028] Step 3: Transfer the dry solid powder obtained above to a porcelain boat and place it in a closed tube furnace, vacuumize and replace with argon three times, then start the reaction at a heating rate of 10°C / min, and control the pressure of the closed tube furnace system 0.2MPa, until the system temperature reaches 900°C, keep it for 3 hours, then continue to inc...

Embodiment 3

[0030] A method for preparing a nanocomposite material integrating heat conduction and wave absorption, specifically comprising the following steps:

[0031] Step 1: Weigh 1.0 g of titanium carbide obtained by hydrofluoric acid etching and add it to 200 mL of deionized water. At 60 ° C, ultrasonically disperse for 1 to 2 hours, and the mixed solution is set aside;

[0032] Step 2: Take 1.5g of boric acid and 10.0g of urea and add them all to the above mixed solution, and stir and dry the mixed solution at 80°C until the mixed solution is completely dried to obtain dry solid powder;

[0033] Step 3: Transfer the dry solid powder obtained above to a porcelain boat and place it in a closed tube furnace, vacuumize and replace with argon three times, then start the reaction at a heating rate of 10°C / min, and control the pressure of the closed tube furnace system 0.5MPa until the system temperature reaches 900°C, keep it for 3 hours, then continue to increase the temperature at 5°C / ...

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Abstract

The invention relates to the technical field of materials and fine chemical engineering, in particular to a nano composite material integrating heat conduction and wave absorption and a preparation method of the nano composite material. The microstructure of the nano composite material belongs to a sandwich-like structure, and boron nitride (BN) nanosheets prepared by a calcination method are uniformly intercalated between microwave absorbing filler (MoS2 or MXene) nanosheets. According to the prepared nano composite material integrating heat conduction and microwave absorption, the reaction condition in the preparation method is moderate, the process operation is simple, the difficulty in preparing the nano composite material integrating heat conduction and microwave absorption at present is solved, and a new method is provided. Therefore, the method has great scientific significance and practical application value.

Description

technical field [0001] The invention relates to the technical field of materials and fine chemicals, in particular to a nanocomposite material integrating heat conduction and wave absorption and a preparation method thereof. Background technique [0002] Boron nitride (BN) is a graphene-like material that has attracted widespread attention due to its excellent physical and chemical properties, especially known as "white graphene" in terms of thermal conductivity of organic-inorganic hybrid materials. In recent years, due to the rapid development of information technology, electromagnetic wave pollution has caused potential hidden dangers to human health, commercial activities, and military security. For this reason, it has been highly valued by various countries. However, the effective means to eliminate electromagnetic waves is to develop high-performance multifunctional absorbers, which can convert electromagnetic waves into other energy and finally dissipate them in the ...

Claims

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Application Information

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IPC IPC(8): C01B21/064C01B32/921C01G39/06C09K3/00
CPCC01B21/064C01B32/921C01G39/06C09K3/00C01P2004/01C01P2004/80
Inventor 张卫东关云山赵云吴申奥马晓英马倩安德平
Owner QINGHAI UNIVERSITY
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