Long-acting low-temperature phase-change cool-storage material, and preparation method thereof

A technology of low-temperature phase change and cold storage materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of inconvenient use, supercooling phenomenon, low latent heat value of phase change, etc., and achieve wide solidification temperature range, large phase The effect of variable latent heat and long-term cooling effect
CN103897665AInactive Publication Date: 2014-07-02SHANGHAI CHANCE ENERGY EFFICIENCY TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI CHANCE ENERGY EFFICIENCY TECH
Publication Date
2014-07-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a long-acting low-temperature phase-change cool-storage material, and a preparation method thereof. The long-acting low-temperature phase-change cool-storage material is composed of, by weight, 10 to 15% of ammonium chloride, 5 to 10% of sodium nitrate, 1 to 5% of sodium phosphate, 10 to 20% of n-dodecane, 10 to 15% of n-decane, 5 to 10% of a surfactant, and the balance water. The preparation method comprises following steps: (a) ammonium chloride, sodium nitrate, and sodium phosphate are dissolved in water, and an obtain mixture liquid is stirred so as to realize complete dissolving; (b) n-dodecane, n-decane, and the surfactant are mixed, and an obtained mixed solution is stirred to be uniform; (c) the mixture liquid is mixed with the mixed solution, and an obtained product is stirred to be uniform. Solidification temperature of the long-acting low-temperature phase-change cool-storage material ranges from -30 to -12 DEG C, phase change latent heat ranges from 300 to 340J / g, and long-term refrigeration can be realized.
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Description

technical field

[0001] The invention relates to a cold storage material and a preparation method thereof, in particular to a long-acting low-temperature phase change cold storage material and a preparation method thereof. Background technique

[0002] In daily life, we often encounter situations that require long-distance preservation of low-temperature frozen items. Typically, dry ice is used to meet this need. However, dry ice has the following disadvantages: it cannot be recycled; storage in airtight containers may cause explosion hazards; the manufacturing technology is special and the manufacturing cost is high; the gasification temperature of dry ice is too low, and improper operation may cause personal injury, etc.

[0003] In order to solve the above problems, phase change cold storage materials came into being. Their working principle is to use the phenomenon that the working fluid absorbs a large amount of heat during the process of changing from one phase to anot...

Claims

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