Heat-conductive additive material, preparation method, and application thereof

A technology for adding materials and composite materials, applied in the field of materials, can solve the problems of poor compatibility between metal oxide particles and substrates, expensive limitations of carbon nanomaterials, etc., to achieve easy promotion and process optimization, good dispersion stability, and high yield. Effect

Active Publication Date: 2018-09-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the addition of nanometer metal oxide particles or carbon nanomaterials can enhance the thermal conductivity of the matrix, the poor compatibility between metal oxide particles and the matrix and the high cost of carbon nanomaterials limit its practical application.

Method used

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  • Heat-conductive additive material, preparation method, and application thereof
  • Heat-conductive additive material, preparation method, and application thereof
  • Heat-conductive additive material, preparation method, and application thereof

Examples

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preparation example Construction

[0030] The invention provides a method for preparing a thermally conductive additive material, comprising the following steps:

[0031] A) under alkaline conditions, after the aqueous solution of graphene oxide is mixed with the aqueous solution containing metal ions, carry out co-precipitation reaction, obtain nanometer metal oxide / graphene oxide composite material;

[0032] B) Mixing and reacting the nano-metal oxide / graphene oxide composite material with alkylamine to obtain a thermally conductive additive material, the alkylamine being selected from dodecylamine, tridecylamine, tetradecylamine, hexadecylamine, Octadecylamine or Diisotridecylamine.

[0033] In the present invention, an aqueous solution of graphene oxide and an aqueous solution containing metal ions are first prepared. Wherein, the configuration method of the aqueous solution of the graphene oxide is:

[0034] The graphene oxide is mixed with deionized water and ultrasonicated to obtain a graphene oxide aq...

Embodiment 1

[0071] In this example, the metal oxide / modified graphene oxide composite material is first obtained by chemical co-precipitation of metal ions and graphene oxide to obtain nanometer metal oxide / graphene oxide, and then the nanometer metal oxide / graphene oxide and alkylamine Nanoscale metal oxide / modified graphene oxide composites were prepared by self-assembly. Its metal metal ions use Fe 3+ , Fe 2+ , Alkylamine selects 18 amines for use. Specific steps are as follows:

[0072] Take 800 mg of graphene oxide and add it into 400 mL of deionized water, and sonicate for 1 hour to obtain a 2 mg / mL graphene oxide solution. Add 160mL of ammonia water to the graphene oxide solution, and slowly add dissolved (0.5g FeCl 3 ·6H 2 O, 1.0g FeCl 2 4H 2 O) 60 mL of aqueous solution, continue to sonicate for 0.5 h. Transfer to an oil bath at 80°C and stir for 5 hours, cool down to room temperature, and wash several times with 150 mL deionized water and 50 mL DMF respectively to obtain...

Embodiment 2

[0080] The preparation method of this embodiment is the same as that of Example 1, except that the metal ions come from copper chloride and aluminum chloride, and the consumption is respectively 0.1g and 0.6g, as shown in Example 2. The metal ions used in the preparation process of the novel heat-conducting material disclosed in the present invention are not limited to a certain element, and can be mixed in various types, and are not limited to a certain fixed weight ratio. The types of metal ions in the new heat-conducting material have a variable mass ratio.

[0081] The result of the composite material prepared in Example 2 is similar to that of Example 1, that is, it has good stable dispersion in liquid paraffin and good thermal conductivity.

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Abstract

The invention provides a preparation method of a heat-conductive additive material, which includes the following steps: A) under alkaline condition, mixing a graphene oxide water solution with a metalion water solution to perform a co-precipitation reaction, thus producing a nano-metal oxide/graphene oxide composite material; B) mixing the nano-metal oxide/graphene oxide composite material with alkyl amine for a reaction to prepare the heat-conductive additive material, wherein the alkyl amine is selected from lauryl amine, tridecylamine, tetradecylamine, cetylamine, octadecylamine, or diisotridecylamine. The new heat-conductive additive material is prepared by supporting the nano-metal oxide on modified graphene oxide, so that advantages of both the nano-metal oxide and the graphene arecombined. Compared with graphene oxide and metal oxides, the material has excellent dispersion stability in a nonpolar substrate, so that a problem of compatibility of the nano-metal oxide particles and a carbon nano-material, as heat-conductive additives, with the nonpolar substrate.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a heat-conducting additive material and a preparation method and application thereof. Background technique [0002] Device thermal management is one of the most serious problems facing advanced industries such as microelectronics, transportation, manufacturing, and defense. One of the common ways to deal with thermal management problems in devices today is liquid cooling. In recent decades, conventional fluids such as water, glycol, and oil have been widely used in heat transfer systems. Among them, oil liquid has its unique advantages in terms of system safety, so it has been widely used in various occasions in recent years, and its usage and consumption are increasing. Phase change cooling is also one of the methods to solve the problem of equipment thermal management, and paraffin organic phase change material (Phase change material, PCM) as an energy-saving an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14C09K5/06
CPCC09K5/063C09K5/14
Inventor 王长宏范贤波梁璐
Owner GUANGDONG UNIV OF TECH
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