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Preparation method for copper/cuprous oxide cladded paraffin microcapsule photothermal conversion phase-change energy-storage composite material

A technology of paraffin microcapsules and cuprous oxide is applied in the field of energy storage materials to achieve the effects of simple preparation method, improved heat transmission speed and excellent light absorption performance

Active Publication Date: 2018-02-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, using the above method, using paraffin as the core material and selecting metal copper / cuprous oxide hybrid particles as the shell material to prepare paraffin phase change energy storage microcapsules has not been reported.

Method used

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  • Preparation method for copper/cuprous oxide cladded paraffin microcapsule photothermal conversion phase-change energy-storage composite material
  • Preparation method for copper/cuprous oxide cladded paraffin microcapsule photothermal conversion phase-change energy-storage composite material
  • Preparation method for copper/cuprous oxide cladded paraffin microcapsule photothermal conversion phase-change energy-storage composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Mix sliced ​​paraffin (0.4g) with oleylamine (0.4g), and stir continuously for 5 minutes at 65°C at a stirring speed of 600 rpm to obtain a uniform oil phase liquid (0.8g).

[0042] (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 was continued at 65° C. at a stirring speed of 600 rpm for 5 minutes to gradually form an emulsion to obtain a reaction mixture (43.2 g).

[0043] (3) Pour the reaction mixture obtained in step (2) into the polytetrafluoroethylene liner of a 100ml high-pressure reactor, put it in a constant temperature oven at 120°C, and react for 6 hours. After the reaction, the emulsion is centrifuged and deionized. After washing with water and drying at 50° C. for 12 hours, the copper / cuprous oxide-coated paraffin phase-change energy storage microcapsules can be obtained.

[0044] figure 1 It is the...

Embodiment 2

[0049] (1) Mix sliced ​​paraffin (3.0g) with oleylamine (1.6g), and stir continuously for 20 minutes at 85°C and a stirring speed of 800 rpm to obtain a uniform oil phase liquid (4.6g).

[0050] (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 was continued for 30 minutes at 85° C. at a stirring speed of 1000 rpm to gradually form an emulsion to obtain a reaction mixture (93.6 g).

[0051] (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 reaction, the emulsion is centrifuged, washed with deionized water, and dried at 50°C for 12 hours. , the copper / cuprous oxide-coated paraffin phase-change energy storage microcapsules can be obtained.

[0052] image 3 It is the SEM photo of the product obtained in t...

Embodiment 3

[0055] (1) Mix sliced ​​paraffin (0.8g) with oleylamine (0.8g), and stir continuously for 10 minutes at 75°C at a stirring speed of 1000 rpm to obtain a uniform oil phase liquid (1.6g).

[0056] (2) Dissolve copper formate tetrahydrate (1.6g) and glucose (3.2g) in deionized water (64g), stir manually for 10min to form a uniform solution, and then add it dropwise to the oil phase in step 1, Stirring was continued for 30 minutes at 75° C. at a stirring speed of 1000 rpm to gradually form an emulsion to obtain a reaction mixture (70.4 g).

[0057] (3) Pour the emulsion into the polytetrafluoroethylene liner of the high-pressure reactor, put it in a constant temperature oven at 120°C, and react for 12 hours. After the reaction, the emulsion is centrifuged, washed with deionized water, and dried at 50°C for 12 hours. , the copper / cuprous oxide-coated paraffin phase-change energy storage microcapsules can be obtained.

[0058] Table 1 shows the DSC test results of paraffin wax and ...

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Abstract

The invention discloses a preparation method for a copper / cuprous oxide cladded paraffin microcapsule photothermal conversion phase-change energy-storage composite material by a hydrothermal method, wherein the preparation method comprises the steps: mixing sliced paraffin and oil amine, and stirring evenly at the temperature of 65-85 DEG C to obtain a paraffin-oil amine mixture; dissolving a reducing agent glucose and a copper source in deionized water, and mixing evenly and dropwise adding into the paraffin-oil amine mixture, and under a condition of the temperature of 65-85 DEG C, stirringevenly to obtain a reaction mixture; and placing the obtained reaction mixture in a high pressure reaction kettle, carrying out a reaction for 6-24 h at the temperature of 120-150 DEG C, centrifugingthe obtained reaction liquid, washing with deionized water, drying for 12 h at the temperature of 50 DEG C, and thus obtaining copper / cuprous oxide cladded paraffin microcapsule photothermal conversion phase-change energy-storage microcapsules. The preparation method is simple and low in cost; paraffin is cladded by copper with high thermal conductivity coefficient and cuprous oxide with high light absorbability; the prepared microcapsules have a uniform particle size less than 3 microns, and have good thermal conductivity and excellent light absorbability.

Description

(1) Technical field [0001] The invention relates to an energy storage material, in particular to a phase change energy storage composite material with light-to-heat conversion function, that is, a preparation method of a copper / cuprous oxide-coated paraffin wax microcapsule light-to-heat conversion phase-change energy storage composite material. (2) Background technology [0002] The energy crisis and environmental pollution are becoming more and more serious. Solar energy, as a green energy, has gradually become a research hotspot. However, limitations in time and space hinder the further development of such renewable energy sources, and a method that can overcome such limitations must be found in order to utilize solar energy more efficiently. Phase change material is a material that utilizes the phase change temperature regulation mechanism to realize the storage and release of solar energy through the phase change of the energy storage medium, which can effectively overc...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 徐斌周静张彩霞倪忠进
Owner ZHEJIANG UNIV OF TECH
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