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Phase change cold-storage composite material and preparation method thereof

A composite material, phase change cold storage technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of poor cold storage and heat transfer performance of eutectic salt, hindering popularization and application, and high equipment investment, and achieve good thermal stability. , Improve the thermal conductivity, improve the effect of thermal conductivity

Active Publication Date: 2017-11-07
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cold storage medium is mainly a mixture of inorganic salts, water, nucleating agents and stabilizers. This method overcomes the shortcomings of ice cold storage that requires a very low evaporation temperature for air-conditioning chillers, but eutectic salt cold storage is used in storage-discharge. The heat transfer performance in the cold process is poor, and the investment in equipment is also high. In practical applications, stratification problems, supercooling problems and stability problems all face high-tech challenges, which hinder the popularization and application of this technology.

Method used

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  • Phase change cold-storage composite material and preparation method thereof
  • Phase change cold-storage composite material and preparation method thereof
  • Phase change cold-storage composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A phase-change cold storage composite material, comprising the following raw materials, a sol with a mass ratio of 45.8:78 and a hydrangea acid / phytol solution, the sol including nano-titanium dioxide, aluminum ammonium sulfate, Polyvinylpyrrolidone, deionized water. The particle size of the nano-titanium dioxide is 25nm, and the crystal form is rutile. The rutile type has a thermodynamically stable phase, and the anatase phase has a relatively strong oxidizing property, and the prepared phase change cold storage material has better performance.

[0027] The above-mentioned phase change cold storage composite material is prepared by the following method, including the following steps, according to the above mass ratio, 1 g of nano-titanium dioxide, 180 g of aluminum ammonium sulfate, and 20 g of polyvinylpyrrolidone are dispersed in 257 g of deionized water, stirred and mixed for 10 minutes, and ultrasonically Treat for 1 hour at a frequency of 40 kHz to make a sol, mi...

Embodiment 2

[0030] A phase change cold storage composite material, comprising the following raw materials, a sol with a mass ratio of 54.2:93.4 and a hydrangea acid / phytol solution, the sol including nano-titanium dioxide, aluminum ammonium sulfate, Polyvinylpyrrolidone, deionized water. The particle size of the nano-titanium dioxide is 25nm, and the crystal form is rutile.

[0031] The above-mentioned phase-change cold storage composite material is prepared by the following method, including the following steps, according to the above-mentioned mass ratio, 8 g of nano-titanium dioxide, 210 g of aluminum ammonium sulfate, and 25 g of polyvinyl pyrrolidone are dispersed in 299 g of deionized water, stirred and mixed for 15 minutes, and ultrasonically Treat for 1.5 hours with a frequency of 40 kHz to make a sol, mix the sol with the hydrangea acid / phytol solution, and disperse for 40 minutes to obtain a phase change cold storage composite material.

[0032] Wherein, the mass ratio of hydra...

Embodiment 3

[0034] A phase change cold storage composite material, comprising the following raw materials, a sol with a mass ratio of 52:80 and a hydrangea acid / phytol solution, and the sol includes nano-titanium dioxide, aluminum ammonium sulfate, Polyvinylpyrrolidone, deionized water. The particle size of the nano-titanium dioxide is 25nm, and the crystal form is rutile.

[0035] The above-mentioned phase-change cold storage composite material is prepared by the following method, including the following steps, according to the above-mentioned mass ratio, 2 g of nano-titanium dioxide, 190 g of aluminum ammonium sulfate, and 21 g of polyvinylpyrrolidone are dispersed in 260 g of deionized water, stirred and mixed for 12 minutes, and ultrasonically Treat for 1.2 hours with a frequency of 40 kHz to make a sol, mix the sol with the hydrangea acid / phytol solution, and disperse for 30 minutes to obtain a phase change cold storage composite material.

[0036] Wherein, the mass ratio of hydrang...

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Abstract

The invention provides a preparation method of a phase change cold-storage composite material, and belongs to the technical field of a phase change material. The preparation method comprises the following steps of taking and scattering nanometer titanium dioxide, aluminum ammonium sulfate and polyvinylpyrrolidone into de-ionized water; after the stirring and mixing, performing ultrasonic treatment for 1 to 1.5h for preparing sol; uniformly mixing the sol with pelargonic acid / phytol solution; performing scattering; obtaining the phase change cold-storage composite material. The invention simultaneously provides the phase change cold-storage composite material. The preparation method is simple; the operation is easy; the prepared finished product rate is high; the stability of the phase change cold-storage composite material is high.

Description

technical field [0001] The invention belongs to the technical field of phase-change materials, relates to materials capable of phase-change cold storage, and in particular to a preparation method of phase-change cold storage composite materials. The preparation method of the present invention is simple, easy to operate, and the yield of the preparation is high. Background technique [0002] There are usually two ways for materials to store thermal energy: sensible heat and latent heat (ie, phase change heat). Sensible heat storage is carried out by using the specific heat capacity of the material and the temperature change of the material; latent heat storage is carried out by using the energy absorption and release of the substance during the state transition process, and the latent heat storage is usually much higher than the sensible heat storage. Therefore, using the latent heat of materials for energy storage and cold storage has a broader prospect. [0003] Cold stor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K5/08
CPCC09K5/063C09K5/08Y02E60/14
Inventor 张建平张川张千张潇
Owner HEBEI MILSON TITANIUM DIOXIDE
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