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Preparation method of diatomite and paraffin composite phase change material

A composite phase change material and phase change material technology, applied in the field of building energy conservation, can solve the problems of cumbersome preparation process, high production cost, leakage of phase change process, etc., and achieve the effect of simple preparation process and low cost

Inactive Publication Date: 2014-12-10
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The specific technical problem to be solved by the present invention is the problem of leakage during the phase change process, and the preparation process is cumbersome and the production cost is high. The purpose is to provide a preparation method of diatomite and paraffin composite phase change material

Method used

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  • Preparation method of diatomite and paraffin composite phase change material
  • Preparation method of diatomite and paraffin composite phase change material
  • Preparation method of diatomite and paraffin composite phase change material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Implement a preparation method of diatomite and paraffin-based composite phase change material, the steps of the preparation method are as follows.

[0050] (1) Dissolve 42wt% phase change material paraffin (sliced) in petroleum ether in water at a temperature of 50°C, and stir for 1 hour with an electromagnetic stirrer to fully dissolve it in petroleum ether (petroleum ether The dosage is twice the volume of paraffin and diatomaceous earth).

[0051] (2) In the above step (1), add the carrier material 58wt% diatomite (Jilin Province, a natural mineral, widely distributed in my country and has a large reserve, and is cheap and easy to obtain), and continue to stir fully to make the diatomite pore structure It can fully contact with the phase change material paraffin, and its surface tension and physical force can fully exert the adsorption of a sufficient amount of paraffin.

[0052] (3) After the diatomite fully absorbs the paraffin, raise the temperature of the water...

Embodiment 2

[0057] Implement a preparation method of diatomite and paraffin-based composite phase change material, the steps of the preparation method are as follows.

[0058] (1) At room temperature, dissolve 38wt% paraffin wax (n-octadecane), a phase change material, in petroleum ether, and stir for 1 hour with an electromagnetic stirrer to fully dissolve it in petroleum ether (petroleum ether The amount of ether used is twice the volume of paraffin and diatomaceous earth).

[0059] (2) In the above step (1), add the carrier material 62wt% diatomite (same as in Example 1), and continue to stir fully, so that the diatomite pore structure can fully contact with the phase change material paraffin, and its surface tension And the physical force can fully play the role of absorbing enough paraffin.

[0060] (3) After the diatomite fully absorbs the paraffin, raise the temperature of the water area to 75°C to completely evaporate the petroleum ether as a solvent, and install a circulating w...

Embodiment 3

[0066] Implement a preparation method of diatomite and paraffin-based composite phase change material, the steps of the preparation method are as follows.

[0067] (1) Just at room temperature, dissolve 35wt% of the phase change material paraffin (this is n-dodecane) in petroleum ether, and stir it with an electromagnetic stirrer for 1 hour to fully dissolve it in petroleum ether (petroleum The amount of ether used is twice the volume of paraffin and diatomaceous earth).

[0068] (2) In the above step (1), add 65wt% diatomite as a carrier material (same as in Example 1), and continue to stir fully so that the diatomite pore structure can fully contact with the phase change material paraffin, and its surface tension And the physical force can fully play the role of absorbing enough paraffin.

[0069] (3) After the diatomite fully absorbs the paraffin, raise the temperature of the water area to 75°C to completely evaporate the petroleum ether as a solvent, and install a circul...

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Abstract

The invention relates to a preparation method of a diatomite and paraffin composite phase change material. The preparation method comprises the following steps: dissolving a phase change material paraffin in petroleum ether in a water domain at a certain temperature and stirring; then, adding a carrier diatomite with nanoscale porous structures, and continuously stirring, so that the porous structures of diatomite can be fully contacted with the phase change material to adsorb sufficient paraffin; and then, raising the temperature of the water domain to 75 DEG C, evaporating the solvent petroleum ether, then condensing and recovering the solvent petroleum ether and drying to obtain a powder composite energy storage material. The composite phase change material provided by the invention is not changed in shape in the phase change process, and paraffin is not leaked. Moreover, the composite phase change material is simple in preparation process, low in cost and energy-saving and environmentally friendly, and the solvent can be recycled.

Description

technical field [0001] The invention relates to a preparation method of a phase change material, in particular to a preparation method of a composite phase change material using paraffin and diatomite as raw materials, and belongs to the composite phase change material used in the field of building energy conservation. Background technique [0002] Use the latent heat of phase change materials to store or release thermal energy, which is suitable for the utilization of solar energy, waste heat recovery, intelligent automatic air-conditioning buildings, glass greenhouses, phase change thermal storage air conditioners, thermal insulation polymer materials and applications in special fields, and The scope of application is gradually expanding. Especially for building energy saving, in the application of traditional solid-liquid phase change materials, in order to prevent the phase change materials from leaking before and after the phase change, container packaging is required, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 马森源高向华宋秀龙牛宝龙闫晓丽魏丽乔
Owner TAIYUAN UNIV OF TECH
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