Magnetic highly-graphitized carbon-based photo-thermal composite phase change material and application thereof

A technology of composite phase change materials and graphitized carbon, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of cumbersome preparation methods, single function of carbon materials, neglect of the adjustment and enhancement effects of metal materials, and achieve The effect of high degree of graphitization, improved crystallization ability, enhanced stability and light-to-heat conversion ability

Pending Publication Date: 2022-03-25
SUZHOU ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these preparation methods can adjust the structure of porous materials to a certain extent and solve the leakage problem of phase change materials, they ignore the function of the metal material itself and its adjustment and enhancement of the carbon structure, and the carbon material used has a single function. The preparation method is cumbersome, which limits its application

Method used

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  • Magnetic highly-graphitized carbon-based photo-thermal composite phase change material and application thereof
  • Magnetic highly-graphitized carbon-based photo-thermal composite phase change material and application thereof
  • Magnetic highly-graphitized carbon-based photo-thermal composite phase change material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of cobalt MOF

[0052] Dissolve 3mmol of terephthalic acid and 3mmol of cobalt acetate tetrahydrate in 25ml of dimethyl sulfoxide, stir at room temperature for 12h, wash with N,N-dimethylformamide and ethanol three times as detergents, and place in a vacuum oven at 60°C Dry in medium for 24h.

[0053] (2) Preparation of magnetic graphitized carbon

[0054] The MOF powder in step (1) was raised to 1000°C at a rate of 5°C / min in a nitrogen atmosphere in a tube furnace, and kept at 1000°C for 3 hours. The final product obtained was magnetic graphitized carbon 1.

[0055] (3) Preparation of magnetic graphitized carbon-based composite phase change materials

[0056] Dissolve 0.6g stearyl alcohol and 0.4g magnetic graphitized carbon in step (2) in 15ml ethanol, sonicate for 20min to dissolve stearyl alcohol, and mix evenly. Completely volatilized, the obtained solid is the composite phase change material 1.

Embodiment 2

[0058] (1) Preparation of cobalt MOF

[0059] Dissolve 3mmol terephthalic acid and 2mmol cobalt acetate tetrahydrate in 25ml dimethyl sulfoxide, stir at room temperature for 12h, wash three times with N,N-dimethylformamide and ethanol respectively, and place in a vacuum oven at 60°C Dry in medium for 24h.

[0060] (2) Preparation of magnetic graphitized carbon

[0061] The MOF powder in step (1) was raised to 1000°C at a rate of 5°C / min in a nitrogen atmosphere in a tube furnace, and kept at 1000°C for 3 hours. The final product obtained was magnetic graphitized carbon 2.

[0062] (3) Preparation of magnetic graphitized carbon-based composite phase change materials

[0063] Dissolve 0.6g of stearyl alcohol and 0.4g of magnetic graphitized carbon in step (2) in 15ml of ethanol, sonicate for 20min to dissolve the stearyl alcohol, and mix evenly. Completely volatilized, the obtained solid is the composite phase change material 2.

[0064] The loading capacity of the phase cha...

Embodiment 3

[0066] (1) Preparation of cobalt MOF

[0067] Dissolve 3mmol terephthalic acid and 1mmol cobalt acetate tetrahydrate in 25ml dimethyl sulfoxide, stir at room temperature for 12h, wash with N,N-dimethylformamide and ethanol three times as detergents, and place in a vacuum oven at 60°C Dry in medium for 24h.

[0068] (2) Preparation of magnetic graphitized carbon

[0069] The MOF powder in step (1) was raised to 1000°C at a rate of 5°C / min in a nitrogen atmosphere in a tube furnace, and kept at 1000°C for 3 hours. The final product obtained was magnetic graphitized carbon 3.

[0070] (3) Preparation of magnetic graphitized carbon-based composite phase change materials

[0071] Dissolve 0.6g of stearyl alcohol and 0.4g of magnetic graphitized carbon in step (2) in 15ml of ethanol, sonicate for 20min to dissolve the stearyl alcohol, and mix evenly. Completely volatilize, the obtained solid is the composite phase change material 3.

[0072] The loading capacity of the phase cha...

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Abstract

The embodiment of the invention relates to the field of phase change materials, in particular to a magnetic highly-graphitized carbon-based photo-thermal composite phase change material and application thereof. Comprising magnetic highly-graphitized porous carbon and a phase change material adsorbed on the surface and / or in pores of the magnetic highly-graphitized porous carbon, the magnetic highly-graphitized porous carbon is a carbon material which is obtained by high-temperature carbonization of a metal organic framework and is highly uniformly dispersed and distributed with magnetic particles, and the magnetic particles are selected from one or more of iron, nickel and cobalt magnetic particles. And the magnetic particles account for 20-50% of the total weight of the magnetic highly-graphitized porous carbon. The magnetic graphitized carbon is used as a base material for packaging the phase change material, the graphitization degree of the magnetic graphitized carbon is high, the photothermal conversion capacity of the composite phase change material can be further improved through the surface plasma resonance (SPR) effect of the ultrahigh-dispersion magnetic particles, and the ultrahigh-dispersion magnetic particles can also be used as heat conduction nodes and heterogeneous nucleation sites to improve the photothermal conversion capacity of the composite phase change material. The heat conduction of the material is improved; and the crystallization capacity of the phase-change material in a three-dimensional carbon carrier structure is adjusted.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to a magnetic high graphitization carbon-based photothermal composite phase change material and its 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] With the development of low-carbon industries and the reduction of fossil fuel resources, solar energy has attracted more and more attention as an environmentally friendly energy source. Latent heat energy storage systems (TES) based on organic phase change materials have shown great potential in solar thermal storage due to their large energy storage capacity, near-constant phase transition temperature, and reversible ch...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 陈晓高鸿毅徐建航唐兆第其他发明人请求不公开姓名
Owner SUZHOU ADVANCED MATERIALS CO LTD
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