Microcapsule phase change energy storage material and preparation method thereof

A phase change energy storage material and microcapsule technology, applied in microcapsule preparations, microsphere preparation, heat exchange materials, etc., can solve the problems of uneven thickness, decreased latent heat value of phase change, etc. Effect of improving flame retardancy and heat transfer performance, high thermal conductivity

Active Publication Date: 2021-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the stage of synthesizing microcapsules, calcium chloride is scattered in the emulsion system in a freely dispersed manner, and is not well restrained around the emulsion droplets. Then sodium carbonate is added dropwise, and the formed calcium carbonate wall material is very easy to cause the thickness of the wall material to vary. Uniform, or calcium carbonate precipitates are directly dispersed in the microcapsule solution, resulting in a decrease in the latent heat of phase change

Method used

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  • Microcapsule phase change energy storage material and preparation method thereof
  • Microcapsule phase change energy storage material and preparation method thereof
  • Microcapsule phase change energy storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 0.2g of sodium lauryl sulfate and 0.2g of octylphenol ethoxylate-10 and dissolve in 100g of deionized water, add 10g of paraffin, and react at 55°C and 800rpm for 25min to form a core material emulsion. Take 50 mL of 1 mol / L barium chloride aqueous solution, add it dropwise into the core material emulsion at 1.25 mL / min, stir and react at 55°C at 500 rpm for 3 h, and obtain a solid-liquid mixture. The resulting solid-liquid mixture was filtered, washed three times with a mixed solvent of deionized water and absolute ethanol with a mass ratio of 2:1, and dried at 50° C. for 24 hours to obtain a microcapsule phase-change energy storage material.

[0034] figure 1 The infrared spectrogram shows that in the infrared characteristic peaks of the sample of Example 1, the infrared characteristic peaks of the core material and the wall material appear simultaneously, that is, the coating effect of the microcapsule phase change energy storage material is good. Depend on f...

Embodiment 2

[0036]Take 0.15g of sodium lauryl sulfate and 0.15g of octylphenol ethoxylate-10 and dissolve them in 70g of deionized water, add 10g of paraffin, and react at 50°C and 700rpm for 20min to form a core material emulsion. Take 30 mL of 1 mol / L barium chloride aqueous solution, add it dropwise to the core material emulsion at 1 mL / min, and react at 50 ° C for 2 h at 400 rpm to obtain a solid mixture. The resulting solid-liquid mixture was filtered, washed three times with a mixed solvent of deionized water and absolute ethanol with a mass ratio of 2:1, and then the suction-filtered product was placed in a drying oven and dried at 45°C for 18 hours to obtain microcapsule phase transition energy storage materials.

Embodiment 3

[0038] Take 0.3g of sodium lauryl sulfate and 0.3g of octylphenol ethoxylate-10 and dissolve them in 120g of deionized water, add 10g of paraffin, and react at 55°C and 1000rpm for 30min to form a core material emulsion. Take 785mL of 1mol / L barium chloride aqueous solution, add it dropwise into the core material emulsion at 2mL / min, and react at 60°C and 600rpm for 4h to obtain a solid mixture. The resulting solid-liquid mixture was filtered, washed three times with a mixed solvent of deionized water and absolute ethanol with a mass ratio of 2:1, and then the suction-filtered resultant was placed in a drying oven and dried at 55°C for 26 hours to obtain microcapsule phase transition energy storage materials.

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Abstract

The invention relates to a microcapsule phase change energy storage material and a preparation method thereof. The preparation method comprises the following steps: dissolving a surfactant in deionized water, adding the phase change energy storage material, and stirring for reaction to form a core material emulsion; preparing a soluble barium salt solution, dropwise adding the soluble barium salt solution into the core material emulsion, and stirring for reaction to obtain a solid-liquid mixture; and filtering, washing and drying the obtained solid-liquid mixture to obtain the microcapsule phase change energy storage material. In the preparation process, the phase-change material emulsion drops are efficiently coated in a barium sulfate precipitation mode, and the prepared microcapsule phase-change energy storage material is complete in morphology and high in heat conductivity coefficient and flame retardance.

Description

technical field [0001] The invention belongs to the technical field of phase-change energy storage materials, and in particular relates to a microcapsule phase-change energy storage material and a preparation method thereof. Background technique [0002] Phase change energy storage technology is a form of energy storage, which stores temporarily unused or excess heat in an appropriate medium and releases it at an appropriate time to match heat supply with time and place and improve energy utilization efficiency. Phase change materials are one of the core contents of phase change energy storage technology. By encapsulating them into microencapsulated phase change materials (MCPCMs) through microencapsulation technology, the solid-liquid phase change materials can be effectively avoided. Because of the inconvenience caused by melting leakage. [0003] Generally, the preparation methods of microcapsule phase change energy storage materials mainly include in-situ polymerizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/06
CPCC09K5/063B01J13/06
Inventor 赵亮王岩刘野黄新露方向晨
Owner CHINA PETROLEUM & CHEM CORP
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