Method for preparing magnesium oxide-graphene composite heat-conduction insulation filler

A composite technology of thermally conductive insulating filler and graphene, applied in the field of fine chemical industry, can solve the problems of complicated preparation process, unfavorable environmental protection and the like

Inactive Publication Date: 2017-03-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current method of preparing insulating filler-graphene composite filler often requires the use of organic solvents, which is not conducive to environmental protection, and the preparation process is relatively complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare 5000 mL of 1 mg / mL graphene oxide aqueous solution, add 1000 ml of 0.75 mol / L magnesium chloride and 1.5 mol / L sodium hydroxide aqueous solution, stir for 2 h, then filter, dry and pulverize, and store in an argon atmosphere at 500 °C Fired for 2 h to obtain magnesium oxide-graphene (reduced graphene oxide) composite filler. Scanning electron microscope analysis showed that MgO was uniformly wrapped on graphene.

[0021] It was added to the polypropylene (PP, Yangzi Petrochemical, grade F401) matrix, and it was found that when the mass fraction of the composite filler was 35%, the resulting composite material maintained insulation, and its thermal conductivity was 0.40 W / m K, which is pure PP (0.21 W / m·K) 1.9 times.

Embodiment 2

[0023] Others are the same as in Example 1, wherein when the mass fraction of the composite filler is 50%, the obtained composite material maintains insulation, and its thermal conductivity is 0.54 W / m·K.

Embodiment 3

[0025] Other is with embodiment 1, wherein replaces magnesium chloride with magnesium nitrate. The resulting composite material maintained insulating properties and had a thermal conductivity of 0.41 W / m·K.

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PUM

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Abstract

The invention belongs to the technical field of fine chemical engineering, and particularly discloses a method for preparing magnesium oxide-graphene composite heat-conduction insulation filler. The method includes the steps that a graphene-oxide water solution serves as a raw material, a magnesium salt solution is added, the pH value is adjusted, the product is subjected to an in-situ deposition reaction on graphene oxide, and magnesium hydrate is obtained; the obtained magnesium hydrate-graphene oxide hybrid material is heated at the inert atmosphere at the temperature of 300 DEG C, and the magnesium oxide-graphene (graphene oxide reduction) composite filler is obtained. The filter is added into an electric insulation polymer, the heat conductivity of the polymer composite material can be improved, and meanwhile the electrical insulating performance is kept. The preparing method is easy to operate, environmentally friendly, easy to produce in a large-scale mode and the like.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a preparation method of magnesium oxide-graphene (reduced graphene oxide) composite thermally conductive insulating filler. Background technique [0002] With the rapid development of the microelectronics industry, integrated circuits are becoming increasingly high-speed and high-density, so microelectronic materials are required to have good thermal conductivity. For some fields (such as the LED field), it is also necessary for the material to have good electrical insulation properties to prevent electrical short circuits and the like. Therefore, the preparation of materials with good thermal conductivity and insulation has attracted the attention of both academia and industry. Polymer materials have become the most widely used electronic support or packaging materials due to their light weight, insulation, and simple molding process. However, for commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/04C08K3/22C08L23/12C08L63/00
CPCC08K3/04C08K3/22C08K2003/222
Inventor 冯嘉春沈子铭
Owner FUDAN UNIV
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