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

An inorganic phase change and constant temperature technology, which is 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, stable performance, and simple process flow

Inactive Publication Date: 2020-05-08
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

Benefits of technology

This patented inorganics that can store or release heat are more durable than traditional materials like metal because they don't lose their effectiveness over time due to decomposition caused by external factors such as light exposure or moisture. They also provide excellent flexibility for use with different types of substrates without losing any functionality.

Problems solved by technology

The technical problem addressed in this Patented Technology relates to finding better ways to prevent damage caused by high temperatures over prolongs their lifetimes while also improving efficiency in refrigidification processes like ice making systems (Ice) due to frequent maintenance requirements. Current methods involve adding expensive cryogen liquids into the air conditioners themselves, increasing costs associated with operating these machines.

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

[0038] (1) After mixing acrylic acid and 15% water at 30-40°C, add strontium chloride hexahydrate to obtain mixed solution I;

[0039] (2) adding sodium chloride to the mixed solution I, then adding 5% water, and reacting at 45° C. for 1 hour to obtain the mixed solution II;

[0040] (3) After mixing glycerol with 6% water, add hydroxyethyl methacrylate and sodium hydroxycellulose to obtain mixed solution III;

[0041] (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;

[0042] (5) After mixing the polymer material and maleic anhydride, add the remaining part ...

Embodiment 2

[0045] This embodiment provides an inorganic phase change constant temperature material, including the following components by weight:

[0046]

[0047] The preparation method of the inorganic phase change constant temperature material is as follows:

[0048] (1) After mixing acrylic acid and 14% water at 30-40°C, add strontium chloride hexahydrate to obtain mixed solution I;

[0049] (2) adding sodium chloride to the mixed solution I, then adding 6% water, and reacting at 45° C. for 1 hour to obtain the mixed solution II;

[0050] (3) After mixing glycerol with 6% water, add hydroxyethyl methacrylate and sodium hydroxycellulose to obtain mixed solution III;

[0051] (4) After mixing boric acid, expanded graphite, the mixed solution II and the mixed solution III, calcium chloride hexahydrate is added, and the reaction is carried out at normal pressure and 45° C. for 1 hour to obtain a polymer material;

[0052] (5) After mixing the polymer material and maleic anhydride, a...

Embodiment 3

[0055] This embodiment provides an inorganic phase change constant temperature material, including the following components by weight:

[0056]

[0057] The preparation method of the inorganic phase change constant temperature material is as follows:

[0058] (1) After mixing acrylic acid and 13% water at 30-40°C, add strontium chloride hexahydrate to obtain mixed solution I;

[0059] (2) adding sodium chloride to the mixed solution I, then adding 3% water, and reacting at 45°C for 1 hour to obtain the mixed solution II;

[0060] (3) After mixing glycerol with 5% water, add hydroxyethyl methacrylate and sodium hydroxycellulose to obtain mixed solution III;

[0061] (4) After mixing boric acid, expanded graphite, the mixed solution II and the mixed solution III, calcium chloride hexahydrate is added, and the reaction is carried out at normal pressure and 45° C. for 0.8 h to obtain a polymer material;

[0062] (5) After mixing the polymer material and maleic anhydride, add ...

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Abstract

The invention relates to a phase-change material, and especially relates 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, sodium chloride, acrylic acid, glycerol, hydroxyethyl methacrylate, maleic anhydride, sodium carboxymethyl cellulose, boric acid and expanded graphite, wherein the total amount of the boric acid and the expanded graphite is 2-12% of the total amount of the inorganic phase-change constant-temperature material; and a mass ratio of the boric acid to the expanded graphite is (1-6):(1-6). The phase-change temperature of the inorganic phase-change constant-temperature material is 26 DEG C, the supercoolingdegree is 0.3 DEG C, the phase-change latent heat is not lower than 236 KJ/Kg, the phase-change process is reversible, and the material can be recycled for not lower than 10000 times; 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 prone to happening.

Description

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Claims

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Application Information

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Owner 北京中海前沿材料技术有限公司
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