Graphene oxide nano inorganic phase-change material and preparation method thereof

A technology of phase change materials and graphene, which is applied in the field of phase change energy storage, can solve problems such as the stability of nano phase change materials, and achieve good cycle stability, reduce supercooling, and promote the effect of specific surface area

Active Publication Date: 2017-07-07
JILIN JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nano-mineral filler phase change material is a suspension, and the nanoparticles automatically agglomerate and sink, which cannot solve the stability of the nano-phase change material. It is still necessary to add a dispersant to improve the stability of the composite material.

Method used

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  • Graphene oxide nano inorganic phase-change material and preparation method thereof
  • Graphene oxide nano inorganic phase-change material and preparation method thereof
  • Graphene oxide nano inorganic phase-change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Dissolve graphene oxide in distilled water, disperse with low-temperature ultrasonic for 120 minutes, disperse into a graphene oxide aqueous solution with a concentration of 0.015g / ml, and seal it for use;

[0021] 2) Add 80 g of CH 3 COONa·3H 2 O is mixed with 2 grams of KCl and heated at 80°C to make the main heat agent. The phase transition temperature range is 40-50°C, the phase transition enthalpy is 180-190j / g, and the supercooling degree is about 15°C;

[0022] 3) Slowly add 1 gram of sodium carboxymethylcellulose into the main heating agent in step 2), and stir evenly under high-speed shearing conditions;

[0023] 4) Add 0.1 g of the ultrasonically dispersed graphene oxide aqueous solution prepared in step 1) to step 3), stir in a water bath ultrasonically, seal and place it, and the product is obtained.

[0024] The phase change temperature range of the nano graphene oxide phase change material is 42~52°C, the degree of supercooling is reduced to 2°C, the ...

Embodiment 2

[0026] 1) Dissolve graphene oxide in distilled water, disperse with low-temperature ultrasonic for 130 minutes, disperse into a graphene oxide aqueous solution with a concentration of 0.015g / ml, and seal it for use;

[0027] 2) Add 82 g of CH 3 COONa·3H 2 O is mixed with 4 grams of KCl and heated at 80°C to make the main heat agent. The phase transition temperature range is 40-50°C, the phase transition enthalpy is 180-190j / g, and the supercooling degree is about 15°C;

[0028] 3) Slowly add 2 grams of sodium carboxymethylcellulose into the main heating agent in step 2), and stir evenly under high-speed shearing conditions;

[0029] 4) Add 0.2 g of the ultrasonically dispersed graphene oxide aqueous solution prepared in step 1) to step 3), stir in a water bath ultrasonically, seal and place it, and the product is obtained.

[0030] The phase change temperature range of the nano-graphene oxide phase change material is 32~42°C, the undercooling degree is reduced to 4°C, the ph...

Embodiment 3

[0032] 1) Dissolve graphene oxide in distilled water, disperse with low-temperature ultrasonic for 130 minutes, disperse into a graphene oxide aqueous solution with a concentration of 0.015g / ml, and seal it for use;

[0033] 2) Add 84 g of CH 3 COONa·3H 2 O is mixed with 6 grams of KCl and heated at 80°C to make the main heat agent. The phase transition temperature range is 40-50°C, the phase transition enthalpy is 180-190j / g, and the supercooling degree is about 15°C;

[0034] 3) Slowly add 4 grams of sodium carboxymethylcellulose into the main heating agent in step 2), and stir evenly under high-speed shearing conditions;

[0035] 4) Add 0.3 g of the ultrasonically dispersed graphene oxide aqueous solution prepared in step 1) to step 3), stir in a water bath ultrasonically and place it in a sealed seal to obtain the product;

[0036] The phase change temperature range of the nano-graphene oxide phase change material is 45~52°C, the undercooling degree is reduced to 1°C, th...

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Abstract

The invention provides a preparation method of a graphene oxide nano inorganic phase-change material. The specific surface area of graphene oxide is utilized to promote crystal nucleation and lower the supercooling degree of an inorganic phase-change material, at the same time, graphene oxide contains a lot of hydroxy, which can bond with inorganic salt crystal water to produce a hydrogen bond, thus effectively avoiding or delaying agglomeration, and improving the system stability. The supercooling degree of an inorganic phase-change material is effectively lowered, and the supercooling degree of the phase-change material can be lowered to 1-3DEG C. According to the invention, the process is simple and easy for operation, the product has homogeneous and stable properties, and small toxic and side effects, etc., and belong to green and environment-friendly products.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of phase change energy storage, and in particular relates to a graphene oxide nanometer inorganic phase change material and a preparation method thereof. [0003] Background technique: [0004] The research on phase change energy storage materials is very important for making full use of solar energy and improving the comfort of human living. Phase change energy storage materials can be divided into organic phase change materials and inorganic phase change materials according to their components. At present, phase change energy storage materials that have been studied more include inorganic crystalline hydrated salts, fatty acid organic phase change materials, polyols and high-density polymers. Solid-solid phase change materials such as ethylene. Solid-to-solid phase change materials such as polyols and high-density polyethylene have high phase transition temperatures and are not suitable for archite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 肖力光赵明月胡洪亮
Owner JILIN JIANZHU UNIVERSITY
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