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A heat-insulating heat-storage composite material and its preparation method and application

A composite material and heat storage technology, applied in heat exchange materials, chemical instruments and methods, buildings, etc., can solve problems such as rising cost of heat energy storage, degradation of thermophysical properties, leakage of phase change materials, etc., to achieve large latent heat and preparation Simple method, cheap raw materials and universal effect

Active Publication Date: 2021-10-12
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The degradation of thermophysical properties of phase change materials during cycling;
[0005] (2) The problem that the phase change material is easy to leak from the matrix;
[0006] (3) The effect of phase change materials on matrix materials
[0007] The economy is mainly manifested as: if the above problems are to be solved to the greatest extent, it will lead to an increase in the cost of unit thermal energy storage, and will definitely lose its competitive advantage with other heat storage methods or ordinary building materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1 Heat insulation and heat storage composite material

[0056] Take 300mL of ethyl stearate and add it to a 500mL high-pressure container, add 2g of foamed PP beads with a diameter of 3-4mm, and vacuumize the container at 40°C for 20 minutes to keep the container in a vacuum state, and use a high-pressure constant-flow pump Inject ethyl stearate into the container until the ethyl stearate has submerged the foamed PP beads and filled the container, then continue to inject ethyl stearate to pressurize the container to 0.5 MPa, and keep the pressure for 3 hours. Open the container after the pressure is released, take out all the thermal insulation and heat storage composite materials, rinse them three times in absolute ethanol at 40°C, and dry them naturally to obtain the thermal insulation and heat storage composite materials.

[0057] In the thermal insulation and heat storage composite material obtained in this embodiment, the weight ratio of ethyl stearate is 1...

Embodiment 2

[0060] Example 2 Heat insulation and heat storage composite material

[0061] Take 300mL of ethyl stearate and add it to a 500mL high-pressure container, add 2g of foamed PP beads with a diameter of 3-4mm, and vacuumize the container at 40°C for 20 minutes to keep the container in a vacuum state, and use a high-pressure constant-flow pump Inject water into the container (the density of water is greater than the density of ethyl stearate), until the ethyl stearate is submerged in the bead foamed PP and fills the container, continue to inject water to pressurize the container to 0.5MPa, stop water injection, and keep Pressure 3h. Open the container after the pressure is released, take out all the thermal insulation and heat storage composite materials, rinse them three times in absolute ethanol at 40°C, and dry them naturally to obtain the thermal insulation and heat storage composite materials.

[0062] In the thermal insulation and heat storage composite material obtained in ...

Embodiment 3

[0065] Example 3 Heat insulation and heat storage composite material

[0066] Take 300mL of ethyl stearate and add it to a 500mL high-pressure container, add 3g of cube-shaped black foam PE with a ridge length of 3-4mm, and vacuumize the container at 40°C for 20 minutes to keep the container in a vacuum state. The constant flow pump injects water into the container (the density of water is greater than that of ethyl stearate), until the ethyl stearate is submerged in the cubic black foamed PE and fills the container, and continues to add water to pressurize the container to 0.5MPa. Stop water injection and keep the pressure for 5h. Open the container after the pressure is released, take out all the thermal insulation and heat storage composite materials, rinse them three times in absolute ethanol at 40°C, and dry them naturally to obtain the thermal insulation and heat storage composite materials.

[0067] In the thermal insulation and heat storage composite material obtained...

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Abstract

The invention discloses a heat-insulating heat-storage composite material as well as a preparation method and application thereof. The composite material includes: a polymer foam material and a phase change material inside the polymer foam material, and the phase change material accounts for 10%-99% by weight of the heat insulation and heat storage composite material; The polymer foaming material accounts for 1%-90% by weight of the heat-insulating heat-storage composite material. The composite material has large latent heat, and the preparation process is green and environment-friendly, which is favorable for popularization.

Description

technical field [0001] The invention belongs to the technical field of phase-change composite materials, and in particular relates to a heat-insulating heat-storage composite material and a preparation method and application thereof. Background technique [0002] Phase change material (PCM-Phase Change Material) refers to a substance that changes the state of matter and provides latent heat when the temperature remains unchanged. The process of changing physical properties is called a phase change process, and the phase change material will absorb or release a large amount of latent heat at this time. At present, this material is widely used in aerospace, construction, clothing, refrigeration equipment, military, communication, electric power and other fields. Once this material is widely used in human life, it will become the best green carrier for energy conservation and environmental protection, and it has been included in the national research and development and utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06E04B1/74E04B1/76
CPCC09K5/06E04B1/74E04B1/76E04B2001/748
Inventor 李化毅刘腾飞李倩胡友良
Owner INST OF CHEM CHINESE ACAD OF SCI
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