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Preparation method of mirabilite-based solid-liquid composite phase change energy storage material

A technology of solid-liquid and composite phase change of Glauber's Nitrate, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of shortened service life, unfavorable popularization and utilization, and reduced performance of Glauber's Nitrate, so as to prolong the service life , Phase change energy storage effect is better, the effect of solving supercooling and phase stratification

Pending Publication Date: 2022-01-25
QINGHAI UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0004] Restricted by the phase change before and after the phase change, Glauberite-based phase change energy storage materials are typical solid-liquid phase change materials, and their phase stratification and supercooling phenomena are particularly obvious, which makes Glauber's salt-based phase-change energy storage materials an excellent choice. The service performance is obviously reduced, and the service life is also obviously shortened, which is not conducive to popularization and utilization

Method used

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  • Preparation method of mirabilite-based solid-liquid composite phase change energy storage material

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0030] Preparation of Graphene Oxide (GO)

[0031] The preparation method of graphene oxide suspension (GO) adopts the common Hummers method, and the concentration is 8.4mg / mL.

preparation example 2

[0033] Preparation of cuprous oxide particles

[0034] Take 10 mg copper chloride dihydrate crystals (CuCl 2 2H 2 O) Dissolved in 15mL of distilled water to form a blue-green solution, add 6mL of 2mol / L NaOH solution under stirring, a blue precipitate appears in the solution, add 12.0mg of ascorbic acid after stirring for 15min, and continue stirring for 10min after the solution turns yellow completely. Filter the solution and dry it under vacuum to obtain yellow cuprous oxide particles with a particle diameter of about 30-60 nm.

Embodiment 1

[0037] A preparation method of mirabilite-based solid-liquid composite phase change energy storage material is as follows:

[0038] S1. Take 4 mL of the GO solution obtained in Preparation Example 1, sonicate for 15 minutes, add 30 mg of cuprous oxide powder and 100 mg of ascorbic acid, stir evenly, adjust the pH to 10.5, transfer the obtained mixed solution into a reaction kettle, and pass through After 15 hours of hydrothermal reaction, the modified nano-graphene composite cuprous oxide hydrogel was obtained.

[0039] S2, the modified nano-graphene composite cuprous oxide hydrogel is added to deionized water and then freeze-dried to obtain block-shaped modified nano-graphene composite cuprous oxide (rGO / Cu 2 O) Airgel composites.

[0040] S3. Take by weighing 5.4g Glauber's salt, 0.6g Sodium Carbonate Decahydrate and 0.3g Calcium Carbonate, put them into a container, add 5L of water, stir to fully dissolve Glauber's Salt and Sodium Carbonate Decahydrate, and obtain Glauber'...

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Abstract

The invention relates to the technical field of phase change energy storage materials, and particularly discloses a preparation method of a mirabilite-based solid-liquid composite phase change energy storage material. The preparation method comprises the following steps: S1, uniformly mixing graphene oxide and cuprous oxide powder according to a mass ratio of 1-2: 1, adjusting the pH value to 10.5, and carrying out a hydrothermal reaction to obtain modified nano graphene composite cuprous oxide hydrogel; S2, cleaning the modified nano graphene composite cuprous oxide hydrogel, and freeze-drying the modified nano graphene composite cuprous oxide hydrogel to obtain block-like modified nano graphene composite cuprous oxide aerogel; S3, preparing a mirabilite-based phase change material; and S4, cutting the modified nano graphene composite cuprous oxide aerogel into a proper size, and adsorbing and shaping the mirabilite-based phase change material by adopting dipping and suction filtration technologies in sequence. The preparation method provided by the invention has the advantages that the problems of super-cooling degree and phase stratification of the mirabilite phase change energy storage material are solved, and the service life of the phase change energy storage material is prolonged.

Description

technical field [0001] This application relates to the technical field of phase-change energy storage materials, and more specifically, it relates to a preparation method of mirabilite-based solid-liquid composite phase-change energy storage materials. Background technique [0002] With the increasingly prominent problems of energy shortage and environmental pollution, it is imminent to promote the development of renewable energy. However, renewable energy such as solar energy is usually supplied intermittently, which seriously restricts the development and utilization of renewable energy. Phase change energy storage materials mainly use the phase change characteristics of the material itself to store heat energy by melting and absorbing heat, solidifying and releasing heat. Because of the characteristics of absorbing or releasing a large amount of heat energy during the phase change process, it is considered a However, in practical applications, problems such as phase stra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 柳馨铁生年汪长安王亮陈凤兰孙增宝宗浩然
Owner QINGHAI UNIVERSITY
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