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Phase change energy storage microcapsule material and its preparation method

A phase-change energy storage and phase-change material technology, which is applied in the field of phase-change energy storage microcapsule materials and their preparation, can solve problems such as affecting the environment and human health, volatile formaldehyde, and restricting the application of phase-change materials, and achieves compactness. Excellent, fast reaction speed, high yield effect

Inactive Publication Date: 2014-01-15
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the materials prepared in the above studies are easy to volatilize harmful substances such as formaldehyde in their preparation and application, which will directly affect the environment and human health, thus limiting the application of this phase change material.

Method used

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  • Phase change energy storage microcapsule material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1, weigh 10 g of n-dodecyl alcohol, 4 g of methyl methacrylate, 1 g of acrylic acid, 0.4 g of Span-60, 0.6 g of Tween-80, 0.05 g of azobisisobutyronitrile, and 100 g of deionized water;

[0022] Step 2: Add n-dodecyl alcohol to deionized water, add emulsifiers Span-60 and Tween-80, mix, stir evenly, heat to 65°C, and use ultrasonic emulsification for 10 minutes;

[0023] Step 3, after ultrasonic emulsification for 10 minutes, transfer the obtained mixture solution to a four-neck flask including mechanical stirring, condenser, nitrogen inlet and feeding port, heat in a water bath to 65°C, and mechanically stir for 20 minutes;

[0024] Step 4: Add methyl methacrylate to the solution in Step 3, pass nitrogen gas to deoxygenate for 0.5 h, heat in a water bath to 80°C, slowly add azobisisobutyronitrile to initiate polymerization of methyl methacrylate, and react at constant temperature for 2 h Finally, add acrylic acid, and continue to keep the water bath at 80°C for 3 ...

Embodiment 2

[0027] Step 1, weigh 5g of n-dodecyl alcohol, 4g of methyl methacrylate, 1g of acrylic acid, 1g of OP-10, 0.1g of potassium persulfate, and 100g of deionized water;

[0028] Step 2: Add n-dodecyl alcohol to deionized water, add emulsifier OP-10, mix, stir evenly, heat to 65°C, and use ultrasonic emulsification for 10 minutes;

[0029] Step 3, after ultrasonic emulsification for 10 minutes, transfer the obtained mixture solution to a four-neck flask including mechanical stirring, condenser, nitrogen inlet and feeding port, heat in a water bath to 65°C, and mechanically stir for 15 minutes;

[0030] Step 4: Add methyl methacrylate to the solution in Step 3, pass nitrogen gas to deoxygenate for 0.5 h, heat in a water bath to 80°C, slowly add potassium persulfate to initiate methyl methacrylate polymerization, react at constant temperature for 2 h, and then Add acrylic acid, and continue to keep the water bath at 80°C for 3 hours;

[0031] Step 5: After the polymerization reactio...

Embodiment 3

[0033] Step 1, weigh 15g of n-dodecyl alcohol, 4g of methyl methacrylate, 1g of acrylic acid, 0.4g of Span-60, 0.6g of Tween-80, 0.1g of ammonium persulfate, and 100g of deionized water;

[0034] Step 2: Add n-dodecyl alcohol to deionized water, add emulsifiers Span-60 and Tween-80, mix, stir evenly, heat to 65°C, and use ultrasonic emulsification for 10 minutes;

[0035] Step 3, after ultrasonic emulsification for 10 minutes, transfer the obtained mixture solution to a four-neck flask including mechanical stirring, condenser, nitrogen inlet and feeding port, heat in a water bath to 65°C, and mechanically stir for 10 minutes;

[0036] Step 4: Add methyl methacrylate to the solution in Step 3, pass nitrogen gas to deoxygenate for 0.5 h, heat in a water bath to 80°C, slowly add ammonium persulfate to initiate methyl methacrylate polymerization, react at constant temperature for 2 h, and then Add acrylic acid, and continue to keep the water bath at 80°C for 3 hours;

[0037] Ste...

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Abstract

The invention relates to a phase change energy storage microcapsule, which takes n-dodecanol as a phase change material and adopts methyl methacrylate-acrylic acid copolymer as a capsule wall material. Ultrasonic-assisted emulsification is adopted, and interfacial polymerization is employed to perform microcapsule packaging. The preparation method of the phase change energy storage material includes: firstly mixing n-dodecanol with an emulsifier, performing ultrasonic emulsification, then conducting mechanical stirring, adding methyl methacrylate and an initiator under 80DEG C water bath to react for certain time, then adding acrylic acid to react, and completing polymerization; and carrying out cooling, filtering, and drying so as to obtain a sample. According to the invention, n-dodecanol is adopted as the phase change material, the phase change temperature can be controlled in the vicinity of room temperature. The methyl methacrylate-acrylic acid copolymer is taken as the capsule wall, which has very good chemical stability and strong adaptability to the environment. Ultrasonic assisted emulsification is employed to form a miniemulsion, and the reaction undergoes more easily. The phase change energy storage microcapsule material provided by invention has the advantages of simple process, low cost, and good stability, and can effectively improve the energy storage effect of a phase change material.

Description

technical field [0001] The invention belongs to the technical field of phase change materials, and in particular relates to a phase change energy storage microcapsule material and a preparation method thereof. Background technique [0002] In recent years, with the development of global industry, energy sources are becoming more and more tense, and the problem of environmental pollution is becoming more and more serious. Therefore, saving energy, improving energy utilization and environmental protection have become the focus of global attention. The research of using phase change materials for energy storage has received extensive attention from all over the world. The particles formed by coating phase-change materials in microcapsules are called phase-change material microcapsules. The phase-change material in the core of the capsule can change phase with the change of external temperature, but the polymer material coated on the surface remains solid. When the ambient tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/16
Inventor 刘宝春李娟李婷杨星琦
Owner NANJING UNIV OF TECH
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