Preparation method of photothermal conversion phase-change energy storage composite material

A light-to-heat conversion and phase-change energy storage technology, which is applied in the direction of heat exchange materials, microsphere preparation, chemical instruments and methods, etc., can solve the problems of insignificant thermal conductivity of microcapsules and low thermal conductivity of zinc oxide, etc. Achieve the effects of simple preparation method, low cost and improved speed

Active Publication Date: 2018-12-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of ZnO is low, and its role in improving the thermal conductivity of microcapsules is not obvious.

Method used

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  • Preparation method of photothermal conversion phase-change energy storage composite material
  • Preparation method of photothermal conversion phase-change energy storage composite material
  • Preparation method of photothermal conversion phase-change energy storage composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Mix carboxylated carbon nanotubes (0.05g), sliced ​​paraffin (0.4g) and oleylamine (0.4g), and stir continuously for 5 minutes at a stirring speed of 600 rpm at 57°C to obtain a uniform oil phase liquid.

[0040] (2) Dissolve copper formate tetrahydrate (0.8g) and glucose (1.6g) in deionized water (40g), stir manually for 10min to form a uniform solution, and then add dropwise to the oil phase in step (1) , stirring continuously for 5 minutes at a stirring speed of 600 rpm, gradually forming an emulsion to obtain a reaction mixture.

[0041] (3) Pour the reaction mixture obtained in step (2) into the polytetrafluoroethylene liner of a 100ml autoclave, put it into a constant temperature oven at 120°C, react for 6 hours, and centrifuge, wash, and After drying, paraffin wax@Cu-Cu2O / CNTs phase change energy storage microcapsules can be obtained.

[0042] figure 2 It is the SEM photo of the product obtained in this embodiment. As can be seen from the figure, the micr...

Embodiment 2

[0044] (1) Mix carboxylated carbon nanotubes (0.07g), sliced ​​paraffin (3.0g) and oleylamine (1.6g), and stir continuously for 20 minutes at a stirring speed of 800 rpm at 70°C to obtain a uniform oil phase liquid.

[0045] (2) Dissolve copper formate tetrahydrate (3.0g) and glucose (6.0g) in deionized water (80g), stir manually for 10min to form a uniform solution, and then add dropwise to the oil phase in step (1) , stirring continuously for 30 minutes at a stirring speed of 1000 rpm, gradually forming an emulsion to obtain a reaction mixture.

[0046] (3) Pour the emulsion into the polytetrafluoroethylene liner of the high-pressure reactor, put it in a constant temperature oven at 150°C, and react for 24 hours. After the reacted emulsion is centrifuged, washed, and dried, paraffin wax can be obtained. Cu-Cu 2 O / CNTs phase change energy storage microcapsules.

[0047] image 3 It is the SEM photo of the product obtained in this embodiment. As can be seen from the figure...

Embodiment 3

[0049] (1) Mix carboxylated carbon nanotubes (0.1g), sliced ​​paraffin (1.6g) and oleylamine (1.6g), and stir continuously for 10 minutes at 80°C at a stirring speed of 1000 rpm to obtain a uniform oil phase liquid.

[0050] (2) Dissolve copper formate tetrahydrate (0.8g) and glucose (1.6g) in deionized water (80g), stir manually for 10min to form a uniform solution, and then add dropwise to the oil phase in step (1) , stirring continuously for 30 minutes at a stirring speed of 1000 rpm, gradually forming an emulsion to obtain a reaction mixture.

[0051] (3) Pour the emulsion into the polytetrafluoroethylene liner of the autoclave, put it in a constant temperature oven at 120°C, and react for 12 hours. After the reacted emulsion is centrifuged, washed, and dried, paraffin wax can be obtained. Cu-Cu 2 O / CNTs phase change energy storage microcapsules.

[0052] Figure 4 It is the SEM photograph of the product obtained in this example. It can be seen from the figure that the...

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Abstract

The invention provides a preparation method of a paraffin / Cu-Cu2O / CNTs photothermal conversion phase-change energy storage composite material. According to the method, copper, cuprous oxide and a carbon nanotube are taken as carriers of a phase-change material, and the phase-change material paraffin is coated to form a phase-change microcapsule. By adopting the method provided by the invention, not only is the heat conductivity of the paraffin phase-change energy storage microcapsule improved, but also the light absorption is obviously improved, in addition, the carbon nanotube with high heatconductivity and light absorption is added, so that the heat conductivity and the light absorption of the microcapsule are further improved, in addition, the preparation method is simple, the cost islow, the problem of leakage of the paraffin in the phase change is effectively solved, and the energy absorption and release speeds of the paraffin are effectively improved in the application of solarenergy storage.

Description

(1) Technical field [0001] The invention relates to a method for preparing an energy storage material, in particular to a method for preparing an enhanced phase change energy storage composite material with light-to-heat conversion function. The composite material is made of Cu-Cu 2 O / CNTs is the shell layer, coated with paraffin to form a microcapsule structure, which is recorded as paraffin@Cu-Cu 2 O / CNTs microcapsules. (2) Background technology [0002] Energy is the material basis of human activities. With the increasing consumption of fossil energy, the energy crisis is approaching quietly. As a renewable energy source, solar energy has always been considered as an important way to solve the energy crisis. However, due to the influence of factors such as day and night, seasons, and geography, solar energy cannot be used anytime and anywhere, so the storage of solar energy is particularly important. Phase change material (PCM) is a material that utilizes the phase cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K3/00B01J13/10
CPCB01J13/025B01J13/10C09K3/00C09K5/063
Inventor 徐斌陈程华倪忠进周静
Owner ZHEJIANG UNIV OF TECH
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