-15 DEG C phase change coolant and preparation method thereof

A phase-change refrigerant and glycerol technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of high degree of subcooling, low degree of subcooling, low freezing efficiency, etc. The effect of transportation cost and long service life

Inactive Publication Date: 2020-02-21
上海直帆冷链技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the market, the general ice storage agent, after freezing, can only maintain the compartment or airtight insulation box at 2-8°C, which cannot meet the low-temperature transportation environment required by the product
At the same time, the existing low-temperature phase-change cold storage liquid on the market has high supercooling degree, low freezing efficiency, and is extremely inconvenient to use.
[0003] The invention discloses a phase-change cold storage agent with a crystallization temperature of -15°C. The cold storage agent is a cross-linked glycerin-polyvinyl alcohol-boric acid ester cross-linked product of organic and inorganic chemical reactions, and its crystallization temperature is between -16°C. -14°C, exists in a solid state. This cold storage material is easy to shape. It is used as a refrigerant with a small degree of supercooling, which can effectively solve the problem of low freezing efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare raw materials according to the following mass percentages:

[0030] 10% glycerin, 2% sodium carboxymethyl cellulose, 3.5% sodium polyacrylate, 0.8% borax, 6% polyvinyl alcohol, and the rest is deionized water;

[0031] Preparation:

[0032] (1) take deionized water with container;

[0033] (2) Add glycerin, borax, sodium carboxymethyl cellulose and sodium polyacrylate sequentially under stirring conditions to fully dissolve and disperse them to obtain mixture A.

[0034] (3) Under the condition of stirring, the mixture A is heated, and polyvinyl alcohol is added to react to obtain a viscous mixture, and the cold storage material composition is obtained after cooling.

[0035] According to the step cooling curve method, the crystallization temperature of the phase change cold storage material composition is -15.7° C., and the latent heat of fusion is 258 kJ / kg.

Embodiment 2

[0037] Prepare raw materials according to the following mass percentages:

[0038] Glycerin 15%, sodium carboxymethyl cellulose 2%, sodium polyacrylate 3%, borax 1%, polyvinyl alcohol 7%, the rest is deionized water;

[0039] Preparation:

[0040] (1) take deionized water with container;

[0041] (2) Add glycerin, borax, sodium carboxymethyl cellulose and sodium polyacrylate sequentially under stirring conditions to fully dissolve and disperse them to obtain mixture A.

[0042] (3) Under the condition of stirring, the mixture A is heated, and polyvinyl alcohol is added to react to obtain a viscous mixture, and the cold storage material composition is obtained after cooling.

[0043] According to the step cooling curve method, the crystallization temperature of the phase change cold storage material composition is -16.2° C., and the latent heat of fusion is 253 kJ / kg.

Embodiment 3

[0045] Prepare raw materials according to the following mass percentages:

[0046] Glycerin 8%, sodium carboxymethylcellulose 1%, sodium polyacrylate 2%, borax 1.5%, polyvinyl alcohol 5%, and the rest is deionized water;

[0047] Preparation:

[0048] (1) take deionized water with container;

[0049] (2) Add glycerin, borax, sodium carboxymethyl cellulose and sodium polyacrylate sequentially under stirring conditions to fully dissolve and disperse them to obtain mixture A.

[0050] (3) Under the condition of stirring, the mixture A is heated, and polyvinyl alcohol is added to react to obtain a viscous mixture, and the cold storage material composition is obtained after cooling.

[0051] According to the step-cooling curve method, the crystallization temperature of the phase change cold storage material composition is -15.3° C., and the latent heat of fusion is 262 kJ / kg.

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Abstract

The invention discloses a -15 DEG C phase change coolant and a preparation method thereof. The -15 DEG C phase change coolant comprises 10-50% of glycerin, 1-3% of sodium carboxymethyl cellulose, 2-5%of sodium polyacrylate, 0.2-2% of borax, 2-10% of polyvinyl alcohol, and deionized water. The -15 DEG C phase change coolant is an organic and inorganic chemical reaction conjugate, the crystallization temperature of the -15 DEG C phase change coolant ranges from -16 DEG C to -14 DEG C, the -15 DEG C phase change coolant is at a solid state, is easy to shape and is small in supercooling degree when used as a refrigerant, and the problem that the refrigeration efficiency is low can be effectively solved.

Description

technical field [0001] The invention relates to a -15°C phase-change cold storage agent, the crystallization temperature of which is between -9°C and -7°C. The -15°C phase-change cold storage agent obtained according to the invention can be used in the fields of low-temperature refrigeration and low-temperature transportation of various frozen products. Background technique [0002] With the development of the fresh food industry, phase change cold storage materials can be used in temperature-controlled packaging and cold chain logistics. Frozen products purchased online are generally transported by express delivery, and the transportation time is short. Frozen products are generally transported in a cold chain at -15°C and will not cause deterioration. In the market, the general ice storage agent, after freezing, can only maintain the compartment or airtight insulation box at 2-8°C, which cannot meet the low temperature transportation environment required by the product. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/066
Inventor 宋汝祥刘小辉
Owner 上海直帆冷链技术有限公司
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