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Composite shape-stabilized phase change material, preparation method and heat storage mortar prepared by using phase change material

A technology of phase change material and organic phase, which is applied in the field of heat storage mortar, can solve the problems of flammability of organic materials, poor compatibility, durability and safety of phase change heat storage mortar, and improve the flame retardancy , Improve the effect of heat storage rate

Inactive Publication Date: 2013-04-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The encapsulation materials of the composite phase change materials used in these patent documents are all graphite or organic materials, which have poor compatibility with cement-based materials, and the organic materials are flammable, which will bring about durability in the application process of phase change thermal storage mortar. Sex and Safety Issues

Method used

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  • Composite shape-stabilized phase change material, preparation method and heat storage mortar prepared by using phase change material
  • Composite shape-stabilized phase change material, preparation method and heat storage mortar prepared by using phase change material
  • Composite shape-stabilized phase change material, preparation method and heat storage mortar prepared by using phase change material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 30g of montmorillonite and 800ml of deionized water, mix and stir evenly, weigh 12g of cetyltrimethylammonium chloride, dissolve it in 160ml of deionized water, pour it into the montmorillonite suspension, and adjust the pH value to 6. Stir in a water bath at 60°C for 3 hours, filter, wash, precipitate, and dry to constant weight to obtain organic montmorillonite.

[0027] Weigh 50g of expanded graphite, 25g of organic montmorillonite, and 300g of paraffin, put them in a certain amount of ethanol solvent, ultrasonically treat for 6-8 hours, remove the organic solvent, dry and grind to obtain a powdery composite phase change material PCM1.

Embodiment 2

[0029] Weigh 15g of montmorillonite and 400ml of deionized water, mix and stir evenly, weigh 6g of cetyltrimethylammonium bromide and dissolve it in 80ml of deionized water, pour it into the montmorillonite suspension, and adjust the pH value to 6. Stir in a water bath at 60°C for 3 hours, filter, wash, precipitate, and dry to constant weight to obtain organic montmorillonite.

[0030] Weigh 52g of expanded graphite, 13g of organic montmorillonite, and 260g of decanoic acid, put them in a certain amount of ethanol solvent, ultrasonically treat for 6-8 hours, remove the organic solvent, dry and grind to obtain a powdery composite phase change material PCM2.

Embodiment 3

[0032] Weigh 15g of vermiculite and 400ml of deionized water, mix and stir evenly, weigh 6g of cetyltrimethylammonium chloride, dissolve it in 80ml of deionized water, pour it into the vermiculite suspension, and adjust the pH value to 6. Stir in a water bath at ℃ for 3 hours, then filter, wash, precipitate, and dry to constant weight to obtain vermiculite.

[0033] Weigh 52g of carbon black, 13g of organic vermiculite, and 260g of paraffin into a certain amount of ethanol solvent, ultrasonically treat for 6-8 hours, remove the organic solvent, dry and grind to obtain a powdery composite phase change material PCM3.

[0034] The composite shaped phase change material prepared in Examples 1-3 was compared with the paraffin phase change material commonly used in the market for performance testing, and the test results are shown in Table 1.

[0035] Examples of heat storage mortar:

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Abstract

The present invention relates to a phase change material and a heat storage mortar prepared by using the phase change material. The phase change material comprises, by weight: one part of an organic layered material, 1-4 parts of a heat conduction enhancer, and 10-20 parts of an organic phase change material. The phase change material has excellent heat storage effect and flame retardant properties, and has good compatibility with a base material. The heat storage mortar prepared by using the phase change material includes, by weight: one part of cement, 1.5-2.5 parts of a fine aggregate, 0.1-0.25 parts of a lightweight aggregate, 0.1-0.3 parts of the composite shape-stabilized phase change material, 0.005-0.02 parts of a binder, 0.001-0.004 parts of a water-retaining agent, 0.001-0.0025 parts of fiber, and 0.75 to 0.9 parts of water. The mortar has a high rate of heat storage, can improve the building thermal comfort, and reduce building energy consumption.

Description

technical field [0001] The invention relates to a phase change material, and also relates to a heat storage mortar prepared by using the phase change material. Background technique [0002] Energy is the basis for human survival. With the improvement of people's living standards, the demand for energy is increasing, but the energy reserves are decreasing day by day, and the utilization rate of energy is not high, which makes the contradiction of energy supply increasingly tense. The development of new energy and the improvement of energy utilization have become the main ways to alleviate the contradiction of energy supply. [0003] Phase change energy storage is a new type of environmental protection and energy-saving technology that uses the phase change latent heat of phase change materials to store energy. It uses the property of absorbing (or releasing) a large amount of heat when a substance undergoes phase change to store heat. High, small equipment size, high therma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C04B24/08C04B28/04
Inventor 李敏郭前刚吴智深陈锦祥
Owner SOUTHEAST UNIV
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