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A heat storage material based on graphene composite skeleton structure and its preparation method

A graphene composite and skeleton structure technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as safety and hidden dangers, and achieve the effects of low cost, improved heat storage, and broad prospects for industrial application.

Active Publication Date: 2021-09-17
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vast majority of organic wall materials are flammable, and a large amount of volatile organic compounds remain in the coated phase change materials, which poses safety hazards in practical applications

Method used

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  • A heat storage material based on graphene composite skeleton structure and its preparation method
  • A heat storage material based on graphene composite skeleton structure and its preparation method
  • A heat storage material based on graphene composite skeleton structure and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Preparation of three-dimensional network graphene-based composite skeleton structure

[0036] A small piece of 400-mesh nickel foam (10mm*8mm*2mm) was immersed in a 5% graphene oxide aqueous solution, taken out and vacuum-dried, and repeated 3 times. Then immerse in 30% epoxy resin ethanol solution for 3-5s, take out and dry at 80°C for 1 hour under vacuum condition;

[0037] The coated foam metal is placed in dilute hydrochloric acid solution until the metal template is completely dissolved. Take out the graphene-epoxy three-dimensional porous material, put it into deionized water, ultrasonicate at 30°C for 10 minutes, repeat 3 times, and dry in vacuum;

[0038] (2) Preparation of composite aggregate heat storage unit

[0039] At room temperature, add 5ml of 25wt.% PEG (molecular weight 2000) ethanol solution to 10ml of 5% Fe3O4 aqueous solution, and ultrasonicate at 30°C for 10 minutes. Then add 0.1 g of nano-sized TiO2 (average particle size about 25nm) to the...

Embodiment 2

[0047] (1) Preparation of three-dimensional network graphene-based composite skeleton structure

[0048] Immerse 800-mesh aluminum foam (10mm*10mm*2mm) in 4% graphene oxide aqueous solution, take it out and dry it in vacuum, repeat 3 times. Then immerse in 25% epoxy resin ethanol solution for 3-5s, take out and dry at 80°C for 1 hour under vacuum condition;

[0049] The coated foam metal is placed in dilute hydrochloric acid solution until the metal template is completely dissolved. Take out the graphene-epoxy three-dimensional porous material, put it into deionized water, ultrasonicate at 30°C for 10 minutes, repeat 3 times, and dry in vacuum;

[0050] (2) Preparation of composite aggregate heat storage unit

[0051] At room temperature, in 30ml of 5% Fe3O4 aqueous solution, add 7.5ml of 20wt.% PEG (molecular weight 4000) ethanol solution, ultrasonic at 30°C for 10 minutes. Then add 0.25 grams of nano-sized TiO2 (average particle size about 25nm) to the above solution, and...

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Abstract

The invention belongs to the technical field of heat storage materials, in particular to a heat storage material based on a graphene composite skeleton structure and a preparation method thereof. The heat storage material of the present invention includes: organic polymer matrix, inorganic material nanoparticles, magnetic material particles, composite aggregate heat storage unit and three-dimensional network graphene-based composite skeleton structure, etc.; the organic polymer matrix is ​​wrapped in the outer layer of magnetic material particles And it is connected with inorganic material nanoparticles to form a composite aggregate heat storage unit; the three-dimensional network graphene-based composite skeleton structure is used as the carrier for the composite aggregate heat storage unit, which is light in weight, good in firmness and high in interface heat conduction efficiency. The invention uses low-cost raw materials and a simple process route, forms a stable internal heat conduction channel, improves heat storage and heat release efficiency, and has potential industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of heat storage materials, and in particular relates to a heat storage material based on a graphene composite skeleton structure and a preparation method thereof. Background technique [0002] Generally speaking, heat storage materials are basically divided into organic phase change materials and inorganic phase change materials. Solid flakes, capsule-like nanomaterials or other composites with fixed shapes can be obtained through doping or multiple compounding. The research on heat storage materials is mainly to improve the thermal conductivity and heat storage capacity of heat storage materials, reduce costs and simplify preparation methods. According to the different heat storage temperature ranges, there are high temperature heat storage and medium and low temperature heat storage. High-temperature heat storage is generally used in industrial applications, such as the use of high-enthalpy materials such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 杨雷
Owner FUDAN UNIV