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Composite phase change energy storage material and preparation method thereof

A technology of composite phase change and energy storage materials, which is applied in the field of composite phase change energy storage materials and their preparation, and can solve the problems of reduced thermal conductivity and high preparation costs

Inactive Publication Date: 2010-06-23
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some polymer substances can be used to encapsulate phase change materials to solve their leakage problem, but the thermal conductivity will be further reduced, and the preparation cost is also high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] (1) Dry the halloysite in a vacuum drying oven at 150°C for 1.5h, cool to room temperature, put in an appropriate amount of 0.2mol / L sulfuric acid ethanol solution, stir at 30°C for 5h, filter, and wash with ethanol until neutral, suction-filtered, dried at 70°C, and ground to obtain the halloysite carrier. (2) Take 3.5g of the above-mentioned halloysite carrier, add an appropriate amount of ethanol as a dispersant, stir and disperse for 20min; take 1.5g of paraffin in an appropriate amount of absolute ethanol to form a dispersion, and put this dispersion into the halloysite carrier for dispersion Then put it into a constant temperature water bath, stir at 70°C for 2 hours, so that a large amount of anhydrous ethanol has volatilized; the product was dried at 80°C to constant weight, and the paraffin / halloysite composite phase change energy storage material was obtained.

[0009] The product was characterized by DSC, and the latent heat of phase change of the composite m...

Embodiment 2

[0011] (1) Dry the halloysite in a vacuum drying oven at 150°C for 2h, cool to room temperature, put in an appropriate amount of 0.3mol / L sulfuric acid ethanol solution, stir at 40°C for 4h, filter, and wash with ethanol until Neutral, suction filtered, dried at 80°C, and ground to obtain the halloysite carrier. (2) Take 3.0 g of the above-mentioned halloysite carrier, add an appropriate amount of ethanol as a dispersant, stir and disperse for 30 minutes; take 2.0 g of paraffin in an appropriate amount of absolute ethanol to form a dispersion, and put this dispersion into the halloysite carrier for dispersion solution, and then placed in a constant temperature water bath, and stirred at a temperature of 50°C for 3 hours to evaporate a large amount of absolute ethanol; the product was dried at 80°C to constant weight to obtain a paraffin / halloysite composite phase change energy storage material. The product was characterized by DSC, and the phase change latent heat of the compo...

Embodiment 3

[0013] (1) Dry the halloysite in a vacuum drying oven at 200°C for 2 hours, after cooling to room temperature, put an appropriate amount of 0.3mol / L sulfuric acid ethanol solution, stir at 50°C for 3 hours, filter, and wash with ethanol until Neutral, suction filtered, dried at 80°C, and ground to obtain the halloysite carrier. (2) Take 2.5g of the above-mentioned halloysite carrier, add an appropriate amount of ethanol as a dispersant, stir and disperse for 30min; take 2.5g of paraffin in an appropriate amount of absolute ethanol to form a dispersion, and put this dispersion into the halloysite carrier for dispersion Then put it into a constant temperature water bath, stir at 60°C for 2 hours, so that a large amount of absolute ethanol has volatilized; the product was dried at 80°C to constant weight, and the paraffin / halloysite composite phase change energy storage material was obtained.

[0014] The product was characterized by DSC, and the phase change latent heat of the c...

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Abstract

The invention discloses a composite phase change energy storage material and a preparation method thereof. The invention relates to an energy storage material and aims to provide the composite phase change energy storage material which has good energy storage thermal effect, low cost and good heat conductivity, and the preparation method for the composite phase change energy storage material. In order to realize the aim, the invention adopts a technical scheme that the composite phase change energy storage material comprises paraffin wax and halloysite which is a material compounded with the paraffin wax, wherein the content of the paraffin wax in percentage by weight is 30 to 80 percent. The composite phase change energy storage material and the preparation method thereof are used for heat accumulation materials.

Description

Technical field: [0001] The invention relates to an energy storage material, in particular to a composite phase change energy storage material and a preparation method thereof. Background technique: [0002] Phase change materials mainly include inorganic phase change materials and organic phase change materials. As a class of organic phase change materials, paraffin wax has the following advantages: high latent heat of phase change, almost no supercooling phenomenon, low vapor pressure when melting, good chemical stability, change of phase change temperature and latent heat of phase change after multiple heat absorption and release It is small, self-nucleating, has no phase separation and corrosion, and is cheap; but it has the disadvantages of low thermal conductivity and easy leakage during packaging, which makes it difficult to popularize and apply in the field of solar energy utilization and construction. Adding high thermal conductivity materials such as metal wires, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 席国喜邢新艳杨文洁梁蕊刘玉民
Owner HENAN NORMAL UNIV
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