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Nano-composite phase-changing material and preparation method

A phase change material and nanocomposite technology, which is applied in the field of nanocomposite phase change materials and their preparation, can solve the problems of limited development and application, long modification time, and low latent heat of materials, so as to reduce process complexity and preparation cost, Good compatibility and little effect on mechanical properties

Inactive Publication Date: 2009-05-13
GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the intercalation composite method needs to modify the montmorillonite first, which takes a long time to modify and consumes a lot of energy and water. At the same time, the amount of organic phase change materials between layers is small, and the latent heat of the overall material is small.
These shortcomings limit the further development and application of this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In a beaker, add 50 parts of phase change material, 13 parts of solid paraffin and 37 parts of liquid paraffin to form 50 parts of phase change material. The phase change temperature of the mixture is 30° C., and the mixture is heated until the solid paraffin is completely melted. Stir well with a glass rod.

[0038] In the beaker, add 40 parts of deionized water and 10 parts of montmorillonite, stir until the montmorillonite is basically dispersed, and then perform high-speed shearing under the high-shear mixing emulsifier, the speed of the high-shear mixing emulsifier is 2500 rpm, and stirred for about 30 minutes to form a uniform montmorillonite gel-state aqueous dispersion.

[0039] In a beaker, 50 parts of montmorillonite gel-state aqueous dispersions and 50 parts of phase-change materials (molten state) are mixed, then carry out high-speed shear stirring with a high-shear mixing emulsifier, and the rotor is 3000 rpm, After about 10 minutes, the system will form a...

Embodiment 2

[0042] In a beaker, add 45 parts of phase change material, 15 parts of solid paraffin and 30 parts of liquid paraffin to form 45 parts of phase change material. The phase change temperature of the mixture is 42° C., and heated until the solid paraffin is completely melted. Stir well with a glass rod.

[0043] In a beaker, add 50 parts of deionized water and 5 parts of kaolin, stir until the kaolin is basically dispersed, and then perform high-speed shearing under a high-shear mixing emulsifier at a speed of 2500 rpm, and stir for about 20 minutes to form A homogeneous aqueous dispersion of kaolin clay in a gel state.

[0044] Mix 55 parts of kaolin gel-state aqueous dispersion and 45 parts of phase change material (molten state), and then carry out high-speed shear stirring with a high-shear mixing emulsifier, the rotor is 3000 rpm, and after about 10 minutes, the system A composite phase change material with a uniform oil-in-water structure will be formed, and the appearance...

Embodiment 3

[0047]In a beaker, add 45 parts of phase change material, 45 parts of n-butyl stearate to form the phase change material. The phase change temperature of n-butyl stearate is 22°C, heat to a molten state, and stir evenly with a glass rod.

[0048] In the beaker, add 40 parts of deionized water and 15 parts of talc powder, stir until the talc powder is basically dispersed, then perform high-speed shearing under the high-shear mixing emulsifier at a speed of 2500 rpm, and stir for about 30 minutes , forming a homogeneous gel-state aqueous dispersion.

[0049] Mix 55 parts of talcum powder gel state water dispersion and 45 parts of n-butyl stearate, and then carry out high-speed shear stirring with a high-shear mixing emulsifier, the rotor is 3000 rpm, and after about 15 minutes, the system A homogeneous oil-in-water structure will form with a homogeneous gel-like appearance.

[0050] The gel is completely dried, its phase transition temperature is 23.6°C, and its phase transitio...

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Abstract

The invention provides a nano composite phase change material and a method for preparing the same, and belongs to the field of material application. The nano composite phase change material comprises the following components in weight portion: 10 to 15 portions of phase change material, 5 to 60 portions of layer-shaped silicate powder, and 20 to 70 portions of deionized water; the phase change point of the phase change material is between 20 and 80 DEG C; the phase change material is heated up to be completely melted; the layer-shaped silicate powder is dispersed in water by a high shear mixed emulsion machine to prepare layer-shaped silicate gel state aqueous dispersion; and the melted phase change material is added to the layer-shaped silicate gel state aqueous dispersion and stirred at high speed by the high shear mixed emulsion machine to obtain the nano composite phase change material with oil-in-water structure. The nano composite phase change material can be directly added to building base materials such as concrete, gypsum, thereby greatly reducing process complexity and preparation cost; moreover, the composite phase change material also has the advantages of simple preparation, large heat storage, and better application prospect.

Description

technical field [0001] The invention relates to a nanocomposite phase change material and a preparation method thereof, which belong to various application fields of materials, and particularly relate to a nanocomposite phase change material formed by a layered silicate with an overlapping structure and a phase change material and a preparation method thereof . Background technique [0002] Saving energy and reducing consumption and improving energy utilization are important topics for sustainable development in today's society. Phase change materials have the characteristics of high heat storage density and approximately isothermal heat storage and release process, which can achieve the purpose of energy storage and release and adjust the mismatch between energy supply and demand. Phase change materials with practical application value include solid-liquid phase change materials and solid-solid phase change materials. Solid-solid phase change materials do not need to be p...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 周盾白周子鹄郝瑞李赉周贾德民
Owner GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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