Inorganic phase-change constant-temperature material and preparation method thereof

An inorganic phase change, constant temperature technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as degradation of thermophysical properties, and achieve the effects of good plasticity, stable performance, and easy large-scale production.

Inactive Publication Date: 2020-04-28
北京中海前沿材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose an inorganic phase change constant temperature material; the inorganic phase change constant temperature material is not prone to degradation of thermophysical properties during the cycle, and is not easy to leak from the matrix

Method used

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  • Inorganic phase-change constant-temperature material and preparation method thereof
  • Inorganic phase-change constant-temperature material and preparation method thereof
  • Inorganic phase-change constant-temperature material and preparation method thereof

Examples

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Embodiment 1

[0035] This embodiment provides an inorganic phase change constant temperature material, including the following components by weight:

[0036]

[0037]

[0038] The preparation method of the inorganic phase change constant temperature material is as follows:

[0039] (1) After mixing sodium formate and 15% water at 45-80°C, add strontium chloride hexahydrate to obtain mixed solution I;

[0040] (2) Add maleic anhydride to the mixed solution I, then add 6% water, and react at 60° C. for 1 hour to obtain the mixed solution II;

[0041] (3) After sodium chloride is mixed with 5% water, potassium persulfate is added to obtain mixed solution III;

[0042] (4) Add calcium chloride hexahydrate after mixing boric acid, expanded graphite, the mixed solution II and the mixed solution III, and react at 65° C. for 1 hour to obtain a polymer material;

[0043] (5) Mix the polymer material with the rest of the water, stir evenly, and leave it for 10-15 minutes.

[0044] The phase ...

Embodiment 2

[0046] This embodiment provides an inorganic phase change constant temperature material, including the following components by weight:

[0047]

[0048]

[0049] The preparation method of the inorganic phase change constant temperature material is as follows:

[0050] (1) After mixing sodium formate and 10% water at 45-80°C, add strontium chloride hexahydrate to obtain mixed solution I;

[0051] (2) Add maleic anhydride to the mixed solution I, then add 4% water, and react at 60° C. for 1 hour to obtain the mixed solution II;

[0052] (3) After sodium chloride is mixed with 5% water, potassium persulfate is added to obtain mixed solution III;

[0053] (4) Add calcium chloride hexahydrate after mixing boric acid, expanded graphite, the mixed solution II and the mixed solution III, and react at 60° C. for 1 hour to obtain a polymer material;

[0054] (5) Mix the polymer material with the rest of the water, stir evenly, and leave it for 10-15 minutes.

[0055] The phase ...

Embodiment 3

[0057] This embodiment provides an inorganic phase change constant temperature material, including the following components by weight:

[0058]

[0059]

[0060] The preparation method of the inorganic phase change constant temperature material is as follows:

[0061] (1) After mixing sodium formate and 12% water at 45-80°C, add strontium chloride hexahydrate to obtain mixed solution I;

[0062] (2) Add maleic anhydride to the mixed solution I, then add 5% water, and react at 60° C. for 1 h to obtain the mixed solution II;

[0063] (3) After sodium chloride is mixed with 4% water, potassium persulfate is added to obtain mixed solution III;

[0064] (4) adding calcium chloride hexahydrate after mixing boric acid, expanded graphite, the mixed solution II and the mixed solution III, and reacting at 70° C. for 1 hour to obtain a polymer material;

[0065] (5) Mix the polymer material with the rest of the water, stir evenly, and leave it for 10-15 minutes.

[0066] The phase...

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Abstract

The invention relates to a phase-change material, in particular to an inorganic phase-change constant-temperature material and a preparation method thereof. The inorganic phase-change constant-temperature material comprises calcium chloride hexahydrate, strontium chloride hexahydrate, maleic anhydride, sodium formate, sodium chloride, potassium persulfate, boric acid and expanded graphite; whereinthe total amount of the boric acid and the expanded graphite accounts for 2-12% of the total amount of the inorganic phase-change constant-temperature material; wherein the mass ratio of the boric acid to the expanded graphite is (1-6): (1-6). According to the inorganic phase-change constant-temperature material, the phase-change temperature is 39 DEG C, the supercooling degree is 0.3 DEG C, thephase-change latent heat is not lower than 221 KJ/Kg, the phase-change process is reversible, and the number of times of recycling is not lower than 10000; and in addition, the situation of thermal physical property degradation does not exist in the circulation process, and leakage from a base body is not likely to happen.

Description

technical field [0001] The invention relates to a phase change material, in particular to an inorganic phase change constant temperature material and a preparation method thereof. Background technique [0002] In many industries such as food, chemical industry, low temperature logistics, medical applications, beer, refrigeration, etc., refrigerators are commonly used to maintain the temperature of the specific temperature of the environment or storage needs. When the refrigerator is powered off, it cannot maintain the environment or the specific temperature required for storage for a long time, so the temperature rises quickly, the storage time of the items is short, and the stored items are easy to deteriorate. In a refrigeration system without a phase-change constant temperature material, when a constant temperature environment is provided, the refrigerator starts frequently, which reduces its service life and consumes more power. [0003] Phase change constant temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 庞希贵
Owner 北京中海前沿材料技术有限公司
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