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Photo-thermal phase change energy storage material as well as preparation method and application thereof

A phase change energy storage material and a phase change material technology, applied in the field of photothermal phase change energy storage materials and their preparation, can solve the problems of low photothermal conversion efficiency, single function, easy agglomeration of photosensitizers, etc., and achieve enhanced heat storage. performance and cycle stability, avoidance of agglomeration, effect of shortening heat transfer paths

Pending Publication Date: 2022-05-13
SUZHOU ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the object of the present invention is to provide a metal-organic framework-based photothermal phase change energy storage material and its preparation method and application, which solves the problem of single function of metal-organic framework-based phase change materials in the prior art , and solve the problem that the photosensitizer used for modifying the phase change composite material is easy to agglomerate, and at the same time overcome the shortcoming of the low photothermal conversion efficiency of the photothermal conversion type phase change composite material, the photothermal composite phase change material prepared by the present invention is in The field of photothermal energy storage has good application prospects

Method used

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  • Photo-thermal phase change energy storage material as well as preparation method and application thereof
  • Photo-thermal phase change energy storage material as well as preparation method and application thereof
  • Photo-thermal phase change energy storage material as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0051] A method for preparing a MOF-based photothermal phase change energy storage material with photothermal conversion performance, the method comprising the steps of:

[0052] (1) MIL-101(Cr) was synthesized by one-step hydrothermal method: first, 1.44g (8.0mmol) 2-aminoterephthalic acid (H2BDC-NH2), 3.20g (8.0mmol) Cr(NO3) 3 9H2O and 0.80 g (20.0 mmol) NaOH were dissolved in 60 mL of deionized water, stirred at room temperature for 30 min; then the mixed solution was transferred to a Teflon-lined autoclave, and reacted at 180 °C for 12 h. Finally, the solid product was purified multiple times using N-N dimethylformamide, methanol, and deionized water, respectively. The centrifuged solid product was dried in a vacuum oven at 100 °C for 24 h to obtain MOF powder.

[0053] Metal-organic framework matrix MIL-101(Cr) adsorbed phase change materials: dry the MOF powder in step (1) in a vacuum oven at 80°C for 24 hours to fully activate and open pores; take 1.0g of vacuum-dried ...

Embodiment 2

[0058] The difference from the preparation method in Example 1 is that the addition amount of pyrrole monomer is 5 mL, and ODA@MOF / PPy-5 is obtained.

[0059] The enthalpy value of the MOF-based photothermal phase change energy storage material ODA@MOF / PPy-5 prepared in this example is 130.85J / g, and the photothermal conversion efficiency can reach up to 85.6%. The results of the anti-leakage test show that the phase There is hardly any leakage when the variable composite material is treated in an oven at 80°C for 1 hour.

Embodiment 3

[0061] The difference from the preparation method in Example 1 is that the addition amount of pyrrole monomer is 6mL to obtain ODA@MOF / PPy-6.

[0062] The enthalpy value of the MOF-based photothermal phase change energy storage material ODA@MOF / PPy-6 prepared in this example is 129.58J / g, and the photothermal conversion efficiency can reach up to 88.3%. The results of the anti-leakage test show that the phase There is hardly any leakage when the variable composite material is treated in an oven at 80°C for 1 hour.

[0063] The SEM image of the ODA@MOF / PPy-6 of the MOF and the composite material in this example 3 is as follows figure 1 Shown are the morphologies of MOF and ODA@MOF / PPy-6 at the same magnification. Compared with pristine MOF, ODA@MOF / PPy-6 exhibits a larger size due to the coating effect of PPy particle polymer on the surface of ODA@MOF.

[0064] The DSC cycle curve of ODA@MOF / PPy-6 of this embodiment 3 through ODA@MOF / PPy-6 is as follows figure 2 As shown, ...

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Abstract

The embodiment of the invention relates to the field of phase change materials, in particular to a photo-thermal phase change energy storage material and a preparation method and application thereof. The preparation method comprises the following steps: immersing the metal organic framework compounded with the phase change material into an oxidant solution, adding a photosensitizer monomer according to the amount to realize a polymerization reaction, vigorously stirring for 1-20 hours, centrifuging, and drying to obtain the photo-thermal phase change energy storage material coated with the organic photosensitizer. The photosensitizer adopted by the invention has high-efficiency light absorption performance, and the photosensitive particles realize polymerization growth and uniform coating on the surface and / or in pores of the metal organic framework-based composite phase change material, so that a heat transfer path is shortened, light-induced heat is promoted to be efficiently transferred to the outside, and the composite material is endowed with high-efficiency photothermal conversion performance; the spectrum utilization range of a single material is widened, and the problem that a traditional metal organic framework-based phase change heat storage material is single in function is solved.

Description

technical field [0001] The invention relates to the field of phase change materials, in particular to a photothermal phase change energy storage material and its preparation method and application. Background technique [0002] In recent years, since non-recyclable fossil fuels are likely to cause environmental pollution and energy crisis, renewable, abundant and clean solar energy is expected to replace fossil fuels and alleviate the energy crisis. Therefore, the application of solar energy storage has received extensive attention. However, due to the intermittent and unstable nature of solar radiation, it is difficult to directly and effectively utilize solar energy. Phase change materials have been used to harvest and store solar energy due to the latent heat of phase change materials during the phase change process. Therefore, the development of energy management systems based on phase change materials with solar thermal conversion properties is considered to be one of...

Claims

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Application Information

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IPC IPC(8): C09K5/06A41D13/005
CPCC09K5/063A41D13/0051
Inventor 陈晓黄梦轲高鸿毅程飘其他发明人请求不公开姓名
Owner SUZHOU ADVANCED MATERIALS CO LTD
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