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

An inorganic phase change and constant temperature technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve problems such as degradation of thermophysical properties, and achieve the effects of good plasticity, simple process flow, and easy scale production

Inactive Publication Date: 2020-05-01
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

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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 carboxymethylcellulose and 10% water at 25-35°C, add maleic anhydride to obtain mixed solution I;

[0040] (2) Add silicon dioxide to the mixed solution I, then add 18% water, and react at 40° C. for 1 hour; obtain mixed solution II

[0041] (3) After mixing acrylic acid and 9% water, add sodium chloride to obtain mixed solution III;

[0042] (4) adding calcium chloride hexahydrate after mixing boric acid, expanded graphite, the mixed solution II and the mixed solution III, and reacting at normal pressure and 40° C. for 1 hour to obtain a polymer material;

[0043] (5) Mix the polymer material with the remaining part of water, and leave it for 10-15 minutes to obtain it.

[0044] ...

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 carboxymethylcellulose and 9% water at 25-35°C, add maleic anhydride to obtain mixed solution I;

[0051] (2) Add silicon dioxide to the mixed solution I, then add 17% water, and react at 40° C. for 1 hour to obtain the mixed solution II;

[0052] (3) After mixing acrylic acid and 8% water, add sodium chloride to obtain mixed solution III;

[0053] (4) adding calcium chloride hexahydrate after mixing boric acid, expanded graphite, the mixed solution II and the mixed solution III, and reacting at normal pressure and 40° C. for 1 hour to obtain a polymer material;

[0054] (5) Mix the polymer material with the remaining part of water, and leave it for 10-15 minutes to obtain it.

[...

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 carboxymethylcellulose and 8% water at 25-35°C, add maleic anhydride to obtain mixed solution I;

[0062] (2) Add silicon dioxide to the mixed solution I, then add 20% water, and react at 40° C. for 1 hour to obtain the mixed solution II;

[0063] (3) After mixing acrylic acid and 8% water, add sodium chloride 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 normal pressure and 40° C. for 1 hour to obtain a polymer material;

[0065](5) Mix the polymer material with the remaining part of water, and leave it for 10-15 minutes to obtain it.

[0...

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Abstract

The invention relates to a phase-change material, specifically to an inorganic phase-change constant-temperature material and a preparation method thereof. The inorganic phase-change constant-temperature material comprises calcium chloride hexahydrate, maleic anhydride, silicon dioxide, sodium carboxymethyl cellulose, acrylic acid, sodium chloride, boric acid and expanded graphite, wherein the total amount of the boric acid and the expanded graphite accounts for 4-12% of the total amount of the inorganic phase-change material; and the mass ratio of the boric acid to the expanded graphite is (2-6): (2-6). The inorganic phase-change constant-temperature material provided by the invention has a phase-change temperature of 17 DEG C, a supercooling degree of 0.3 DEG C and a phase-change latentheat of no lower than 189 KJ / Kg; the phase-change process is reversible, and the number of times of recycling is not lower than 10000; in the circulation process, the situation that the thermophysicalproperty is degraded does not exist; meanwhile, the inorganic phase-change constant-temperature material is not prone to leaking from a base body.

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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IPC IPC(8): C09K5/06
CPCC09K5/066
Inventor 庞希贵
Owner 北京中海前沿材料技术有限公司
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