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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 its preparation, can solve the problems of high preparation cost and reduced thermal conductivity, and achieve the effect of high phase change latent heat and no leakage thermal conductivity

Inactive Publication Date: 2010-08-11
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) Get 3.5g of the above-mentioned halloysite carrier, add appropriate amount of ethanol as a dispersant, stir and disperse for 20min; get 1.5g of stearic acid and dissolve it in an appropriate amount of absolute ethanol to form a solution, and put this solution into the halloysite carrier Dispersion liquid, 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 been volatilized; the product is dried at 80°C to constant weight, and the stearic acid / halloysite composite phase change storage is obtained. energy material.

[0009] The product was characterized by DSC, and the phase change latent he...

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 appropriate amount of ethanol as a dispersant, stir and disperse for 30 min; get 2.0 g of stearic acid and dissolve it in an appropriate amount of absolute ethanol to form a solution, and put this solution into the halloysite carrier Then put it into a constant temperature water bath, stir at a temperature of 50°C for 3 hours, so that a large amount of anhydrous ethanol has volatilized; the product is dried at 80°C to a constant weight, and the stearic acid / halloysite composite phase change storage is obtained. energy material.

[0012] The product was characterized by DSC, and the phase change latent heat ...

Embodiment 3

[0014] (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) Get 2.5g of the above-mentioned halloysite carrier, add appropriate amount of ethanol as a dispersant, stir and disperse for 30min; get 2.5g of stearic acid and dissolve it in an appropriate amount of absolute ethanol to form a solution, and put this solution into the halloysite carrier Dispersion liquid, then put it into a constant temperature water bath, stir at 60°C for 2 hours, so that a large amount of anhydrous ethanol has been volatilized; the product is dried at 80°C to constant weight, and the stearic acid / halloysite composite phase change storage is obtained. energy material.

[0015] The product was characterized by DSC, and the phase ch...

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Abstract

The invention discloses a composite phase-change energy-storage material and a preparation method thereof and aims to provide a composite phase-change energy-storage material with high phase-change latent heat, leakage resistance, good heat-conducting performance and low cost and a preparation method thereof. The invention adopts the technical scheme that the composite phase-change energy-storage material comprises a stearic acid phase-change material and nerchinskite as a material combined with the stearic acid phase-change material. The preparation method comprises the following steps of: (1) drying the nerchinskite in vacuum at 150-250 DEG C for 1-3h and cooling to a room temperature; (2) adding an ethanol solution of sulphuric acid to the nerchinskite, stirring at 30-50 DEG C for 3-5h, filtering, washing with the ethanol solution to be neutral and carrying out suction filtration; (3) drying at 70-90 DEG C and grinding to prepare a stearic acid phase-change material carrier; (4) preparing an ethanol solution of the stearic acid; and (5) putting the ethanol solution of the stearic acid into the dispersion liquid of the nerchinskite and the ethanol and drying at 80 DEG C to have constant weight so as to obtain a stearic acid / nerchinskite composite phase-change energy-storage material. The invention is used for heat-storage 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] During the process of phase change, phase change materials absorb or release heat (cold) to the environment, so as to achieve the purpose of controlling the ambient temperature and saving energy. Fatty acid organic phase change materials have the advantages of high latent heat of phase change, good thermal and chemical stability, no supercooling phenomenon, small volume change during phase change, low price, and non-toxic, but have low thermal conductivity And the shortcomings such as easy leakage when the phase transition process changes from solid phase to liquid phase, so their direct utilization is greatly limited. Adding high thermal conductivity materials such as metal wires, rings or sheets to the phase change energy storage material can improve the thermal condu...

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刘玉民梁蕊
Owner HENAN NORMAL UNIV
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