Phase change composite material and preparation method thereof

A phase-change composite material and phase-change material technology, applied in the field of phase-change composite materials and their preparation, can solve the lack of effective verification and in-depth research on the application adaptability and application methods of phase-change materials or phase-change composite materials, and no proposal Building energy-saving solutions, poor mechanical properties and durability, etc., to achieve good circulation melting, no supercooling and precipitation, and rapid film formation

Inactive Publication Date: 2012-12-19
上海英硕聚合材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above several phase change composite materials all have the following disadvantages: 1. The optimum phase change temperature range of the phase change material suitable for building energy saving is 25-35°C, while the phase change temperature range of the above phase change composite material Not well suited for building energy efficiency
2. The phase change enthalpy of paraffin phase change composite materials is not high, and the temperature adjustment effect is not good when the unit usage is lowered.
3. Poor mechanical properties and durability
In pr...

Method used

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  • Phase change composite material and preparation method thereof
  • Phase change composite material and preparation method thereof
  • Phase change composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 55 parts by weight of a phase change material made by blending decanoic acid, dodecanoic acid and myristic acid with a weight ratio of 25%, 33% and 42% respectively, and 100 parts by weight of expanded perlite particles were placed in an environment of 18°C. Put it into a closed container, evacuate to 75kPa, keep the vacuum pressure constant, heat the closed container to 65°C, keep it warm for 2h, gradually cool down to 18°C, and take out the expanded perlite particles that have adsorbed the phase change material. The expanded perlite particles that have adsorbed the phase change material are placed in a rotating container that can continuously turn the material, and 73.5 parts by weight of the polymer emulsion are sprayed on its surface in a mist, and the obtained particle surface film thickness is 0.03mm. Continue to turn the material until the surface is dry. The selected polymer emulsion is 3099 styrene-acrylic emulsion of Federal Chemical Industry.

[0029] The pe...

Embodiment 2

[0035] 75 parts by weight of the phase change material made by blending 37.5%, 33% and 29.5% by weight of decanoic acid, dodecanoic acid and myristic acid, and 100 parts by weight of expanded perlite were placed in an environment of 20°C. In the airtight container, evacuate to 80kPa, keep the vacuum pressure constant, heat the airtight container to 70°C, keep it warm for 4 hours, gradually cool down to 18°C, and take out the expanded perlite particles that have absorbed the phase change material. The expanded perlite particles that have absorbed the phase change material are placed in a rotating container that can continuously turn the material, and 200 parts by weight of the polymer emulsion are sprayed on the surface in a mist form, and the surface film thickness of the obtained particles is 0.05mm. Continue to turn the material until the surface is dry. The selected polymer emulsion is Lianlian Chemical A-119 acrylic emulsion.

[0036] The performance of the phase-change c...

Embodiment 3

[0042] 58 parts by weight of phase-change materials blended by decanoic acid, dodecanoic acid, myristic acid and palmitic acid by weight respectively at 25%, 34.5%, 25% and 15.5%, and 100 parts by weight of expanded perlite, Put it in an airtight container at 0°C, evacuate to 78kPa, keep the vacuum pressure constant, heat the airtight container to 68°C, keep it warm for 3 hours, gradually cool down to 5°C, and take out the expansion that has absorbed the phase change material Perlite grains. The expanded perlite particles that have absorbed the phase change material are placed in a rotating container that can continuously turn the material, and 50 parts by weight of the polymer emulsion is sprayed on its surface in a mist form, and the surface film thickness of the obtained particles is 0.025mm. Continue to turn the material until the surface is dry. The selected polymer emulsion is Lianlian Chemical A-119 acrylic emulsion.

[0043] The performance of the phase-change compos...

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Abstract

The invention relates to a phase change composite material and a preparation method thereof. The phase change composite material is composed of a phase change material, expanded perlite particles and polymer emulsion in a weight ratio of (0.55-0.75): 1: (0.5-2.0), wherein the polymer emulsion is coated over the surface of the expanded perlite particles which have adsorbed the phase change material, and the phase change material is a blend of three or four selected from the group consisting of decanoic acid, lauric acid, tetradecanoic acid, palmitic acid and stearic acid. The preparation method comprises a step of combining the phase change material and the expanded perlite particles together by using a vacuum adsorption process and a step of coating a compound of the phase change material and the expanded perlite particles with the polymer emulsion. The phase change composite material provided by the invention has the advantages of great phase change energy storage capacity, good sealing capacity, wide material sources and low cost, can be used to substitute or partially substitute thermal insulation aggregate in conventional inorganic thermal insulation mortar for indoor and outdoor insulation of a building and can be mixed with inorganic cementing materials like cement and gypsum to prepare a sheet material product.

Description

technical field [0001] The invention belongs to the technical field of building energy-saving materials, and in particular relates to a phase-change composite material and a preparation method thereof. Background technique [0002] Energy is the blood of the survival and development of human society. As the energy and environmental crisis caused by electric power supply has attracted more and more people's attention, how to develop new green energy and improve the utilization rate of energy is particularly important. [0003] Phase change energy storage materials can absorb energy from the environment and release energy to the environment, which can better solve the contradiction between energy supply and demand in time and space, thus effectively improving the utilization rate of energy. At the same time, the temperature of the phase change energy storage material remains basically constant during the phase change process, which can be used to control the temperature of the...

Claims

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Application Information

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IPC IPC(8): C09K5/06C04B16/00C04B14/18
Inventor 程颐辛春华阮丰乐史继超尧璟云
Owner 上海英硕聚合材料股份有限公司
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