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Composite amorphous phase-change heat storage material and preparation method thereof

A technology of phase change material and heat storage material, applied in the field of composite shape-setting phase change heat storage material and its preparation, can solve the problems that the phase change process cannot proceed spontaneously, the thermal conductivity of the phase change material is low, and the use is inconvenient, etc. The effect of large force, thermal conductivity, safe and convenient use

Inactive Publication Date: 2014-01-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese patent application 201110020197.1 provides a calcium chloride hexahydrate phase-change energy storage material composition and its preparation method. In this patent, the supercooling degree of calcium chloride hexahydrate is greatly reduced, from 20°C under normal conditions The temperature dropped to 3°C. Although this method can effectively solve the supercooling phenomenon of inorganic hydrated salt phase change materials, the disadvantages are also obvious, that is, it is inconvenient to use, the phase change process cannot be carried out spontaneously, and manual operation is required every time.
Moreover, the above methods are difficult to solve the problems of low thermal conductivity of phase change materials, need to be packaged during use, and easy to leak during phase change.

Method used

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  • Composite amorphous phase-change heat storage material and preparation method thereof
  • Composite amorphous phase-change heat storage material and preparation method thereof
  • Composite amorphous phase-change heat storage material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Step 1: Take 5g of expandable graphite and dry it in a vacuum oven at 80°C for 15 hours, and then heat the dried expandable graphite in a microwave oven at high temperature for 15 seconds to form expanded graphite with a porous structure.

[0028] Step 2, take 0.5g CaCl 2 ·6H 2 O into a beaker, add a small amount of deionized water (the deionized water is just enough to wet the solid particles), and then place it in an oven at 80°C for 2 hours to make the CaCl 2 ·6H 2 O melts completely. Then add 0.08g OP-10 and ultrasonically disperse for 30min to form a stable emulsion. Add 0.5g of expanded graphite into the emulsion, stir and disperse evenly, put the mixture into a vacuum oven, evacuate, keep the room temperature constant for 30min, and complete the adsorption process; take it out to obtain a composite shape-changing heat storage material.

[0029] The phase transition temperature of the obtained composite shape-setting phase change heat storage material is 27.94...

Embodiment 2

[0032] Step 1: Take 5g of expandable graphite and dry it in a vacuum oven at 80°C for 15 hours, and then heat the dried expandable graphite in a microwave oven at high temperature for 15 seconds to form expanded graphite with a porous structure.

[0033] Step 2, take 0.6g CaCl 2 ·6H 2 O into a beaker, add a small amount of deionized water (deionized water just wets the solid particles), and then place it in an oven at 80°C for 2 hours to make the CaCl 2 ·6H 2 O melts completely. Then, add 0.08g OP-10 and ultrasonically disperse for 30min to form a stable emulsion. Add 0.4g of expanded graphite into the emulsion, stir and disperse evenly, put the mixture into a vacuum oven, evacuate, keep the room temperature constant for 30min, and complete the adsorption process; take it out to obtain a composite shape-fixed phase-change heat storage material.

[0034] The phase transition temperature of the obtained composite shape-setting phase change heat storage material is 31.46°C, t...

Embodiment 3

[0037] Step 1: Take 5g of expandable graphite and dry it in a vacuum oven at 80°C for 15 hours, and then heat the dried expandable graphite in a microwave oven at high temperature for 15 seconds to form expanded graphite with a porous structure.

[0038] Step 2, take 0.84g CaCl 2 ·6H 2O in a beaker, and add a small amount of deionized water (the deionized water just wets the solid particles), and then place it in an oven at 80°C for 2 hours to make the CaCl 2 ·6H 2 O melts completely. Then, add 0.14g OP-10 and ultrasonically disperse for 30min to form a stable emulsion. Add 0.36g of expanded graphite into the emulsion and disperse evenly. Put the mixture into a vacuum oven, evacuate it, and keep the room temperature constant for 30 minutes to complete the adsorption process; take it out to obtain a composite shape-fixed phase-change heat storage material.

[0039] The obtained composite shape-changing heat storage material has a phase transition temperature of 30.74°C, a p...

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Abstract

The invention relates to a composite amorphous phase-change heat storage material and a preparation method thereof, and belongs to the technical field of composite materials. The composite material is prepared from a porous material used as a support material and an inorganic hydrous salt used as a phase-change material in manners of absorbing the inorganic hydrous salt into a porous structure of the support material by virtue of the capillary adsorption action of the porous material, and self-assembly of a surfactant. The method comprises the following steps: firstly, emulsifying and dispersing the molten inorganic hydrous salt phase-change material such as calcium chloride hexahydrate by the emulsifying dispersion effect of the surfactant under an ultrasonic condition, so as to form a stable emulsion; adding expanded graphite to the emulsion to evenly disperse; putting the mixture into a vacuum oven, vacuumizing and keeping in a constant state for 30 minutes at room temperature, so as to prepare a novel composite amorphous phase-change heat storage material which is high in phase-change latent heat, good in heat-conducting property, and low in cost.

Description

technical field [0001] The invention belongs to the technical field of heat energy storage, and in particular relates to a composite shape-fixed phase-change heat storage material and a preparation method thereof. Background technique [0002] Inorganic phase change materials are widely used in floor heating, building energy saving, solar energy utilization, industrial waste heat and Waste heat recovery and other fields. Inorganic hydrated salt is one of the important branches. It is a very important kind of medium and low temperature phase change heat storage materials. At present, the hydrated salts that are widely used mainly include alkali and alkaline earth metal halides, nitrates, phosphates, and sulfates. , carbonates and acetates, etc. This type of phase change material also has its own disadvantages, that is, it is prone to supercooling, phase separation and leakage during phase change. This greatly limits its deeper and wider application in many fields. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 孙立贤段志军张焕芝徐芬曹忠张箭
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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