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Hierarchical pore carbon-based photo-thermal phase change material as well as preparation method and application thereof

A phase change material and multi-level hole technology, which is applied in the field of phase change materials to achieve the effects of high photothermal conversion efficiency, efficient and fast heat transfer and light absorption, and high specific surface area.

Pending Publication Date: 2022-04-19
苏州双碳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inherent weak photon-harvesting ability of pure PCMs has been the bottleneck restricting its photothermal conversion application, so it is urgent to develop high-efficiency photothermal conversion materials to further improve the performance of solar photothermal phase change energy storage.

Method used

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  • Hierarchical pore carbon-based photo-thermal phase change material as well as preparation method and application thereof
  • Hierarchical pore carbon-based photo-thermal phase change material as well as preparation method and application thereof
  • Hierarchical pore carbon-based photo-thermal phase change material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A method for preparing a hierarchically porous carbon-based photothermal phase change material, specifically comprising the following steps:

[0053] (1) Preparation of MOF-5:

[0054] Zn(NO 3 ) 2 .6H 2 A solution of O (12.39 g) and terephthalic acid (3.06 g) dissolved in 360 mL of dimethylformamide (DMF) was stirred in a flask for 1 h, then triethylamine (14.4 g) was slowly dropped dropwise. After stirring for 30 min, 2.7 ml of 30% hydrogen peroxide aqueous solution was added, and stirred for another 30 min. Finally, the obtained solid was filtered, washed three times with DMF and three times with methanol, and dried at 80° C. for 24 h.

[0055] (2) Preparation of MOF-5-PC carrier material:

[0056] MOF-5 was directly carbonized to obtain MOF-5-PC. Put the MOF-5 white powder in an alumina crucible, heat it to a certain temperature X at a rate of 5 °C / min under nitrogen flow, maintain the temperature X for 3 hours, and then cool it to room temperature at a rate of...

Embodiment 2

[0070] A method for preparing a three-dimensional metal-organic framework derivative-based photothermal composite phase change material, specifically comprising the following steps:

[0071] (1) Preparation of IRMOF-3:

[0072] Zn(NO 3 ) 2 .6H 2 O (595 mg) and 2-aminoterephthalic acid (181 mg) were dissolved in 50 ml of DMF, stirred vigorously for 5 min, then added triethylamine (101 mg), and stirred for 120 min. The generated precipitate was collected by centrifugation, washed three times in DMF and three times with methanol, and then dried in a vacuum oven at 80° C. for 24 hours to obtain a sample.

[0073] (2) Preparation of IRMOF-3-PC carrier material:

[0074] IRMOF-3 was directly carbonized to obtain IRMOF-3-PCs. Put IRMOF-3 white powder in an alumina crucible, heat it to a certain temperature X at a rate of 5°C / min under nitrogen flow, and maintain it for 3 hours, and then cool it to room temperature at a rate of 10°C / min to obtain a carbon material .

[0075] Amon...

Embodiment 3

[0080] A method for preparing a three-dimensional metal-organic framework derivative-based photothermal composite phase change material, specifically comprising the following steps:

[0081] (1) Preparation of ZIF-8:

[0082] Zn(NO 3 ) 2 .6H 2 O (623 mg) and 2-methylimidazole (221 mg) were dissolved in 25 mL of methanol solution, respectively. Then Zn(NO 3 ) 2 .6H 2 The O methanol solution was quickly poured into the 2-methylimidazole methanol solution, and stirred vigorously for 5 min. After the stirring, the samples were aged for 10min, 3h and 24h respectively. Finally, the white precipitate was centrifuged and washed several times with methanol and dried overnight at room temperature.

[0083] (2) Preparation of ZIF-8-PC carrier material:

[0084] ZIF-8 was directly carbonized to obtain ZIF-8-PCs. Put ZIF-8 white powder in an alumina crucible, heat it to a certain temperature X at a rate of 5°C / min under nitrogen flow, and maintain it for 3 hours, and then cool it...

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Abstract

The embodiment of the invention relates to the field of phase change materials, in particular to a hierarchical pore carbon-based photo-thermal phase change material and a preparation method and application thereof. The preparation method comprises the following steps: immersing the zinc oxide / hierarchical porous carbon compound into a phase change material solution, stirring, dipping and drying to prepare the composite phase change material; the preparation method of the zinc oxide / hierarchical porous carbon compound comprises the following steps: performing high-temperature carbonization on a zinc-metal organic framework in an inert gas atmosphere, heating to a carbonization temperature at a speed of 2-8 DEG C / min, keeping for 1-6 hours, and cooling to room temperature at a speed of 5-15 DEG C / min. The controllable carbonization method is adopted to control the carbonization temperature to treat Zn-MOF, it can be guaranteed that a ZnO photosensitizer generated through in-situ high dispersion in the carbonization process can have ultrahigh dispersity and high photon capture capacity in a hierarchical carbon frame, and the efficient photothermal conversion capacity of the composite phase change material is guaranteed through the synergistic effect; the ordered three-dimensional structure loaded with the phase change material can realize rapid heat transfer, and the photothermal conversion efficiency is improved.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to a hierarchical porous carbon-based photothermal phase change material and its preparation method and application. Background technique [0002] The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] As an ideal renewable energy source, solar energy has the advantages of abundant resources and no pollution. In recent years, photothermal conversion technology is a way to effectively utilize solar energy, which can convert solar energy into heat energy. However, photothermal conversion technology is limited by the intermittent, unstable, dispersed and low energy conversion efficiency of solar energy. Therefore, int...

Claims

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Application Information

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IPC IPC(8): C09K5/06C09K5/14F24S60/10
CPCC09K5/063C09K5/14F24S60/10Y02E10/40
Inventor 陈晓万莹高鸿毅高琰其他发明人请求不公开姓名
Owner 苏州双碳新材料有限公司
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