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A thermoplastic polyethylene glycol-based phase-change energy storage material and its preparation method and application

A phase change energy storage material, polyethylene glycol-based technology, applied in heat exchange materials, energy storage, chemical instruments and methods, etc. The method is complicated and other problems, to achieve the effect of good recyclability, unlimited storage period and good dielectric constant

Active Publication Date: 2022-05-17
SOUTH CHINA AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of preparing solid-solid phase change materials, the above-mentioned technical means have relatively complicated preparation methods, and it is easy to cause the latent heat of phase change of composite phase change materials to decrease, the enthalpy of phase change to decrease, or easy to denature during the long-term phase change process, etc. shortcoming
In addition, polyethylene glycol, as an organic phase change heat storage material, has a low thermal conductivity, which is not conducive to heat transfer.

Method used

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  • A thermoplastic polyethylene glycol-based phase-change energy storage material and its preparation method and application
  • A thermoplastic polyethylene glycol-based phase-change energy storage material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 70g average molecular weight is 10000 polyethylene glycol monoacrylate, 3g photoinitiator 1-hydroxycyclohexyl phenyl ketone (Irgacure-184), 0g or 1g nano boron nitride dispersion liquid is added 30g average molecular weight is 200 In the methoxypolyethylene glycol monomethacrylate, stir evenly, then pour the above precursor into the mold, and cure it under the ultraviolet light with a wavelength of 365nm and a power of 1kW for 2min to obtain photocurable polyethylene glycol based phase change energy storage materials. The boron nitride particle size in the nano boron nitride dispersion liquid is 200nm, the dispersed phase is polyethylene glycol with a molecular weight of 200, and the mass concentration of the dispersion liquid is 5%. The thermal conductivity of the samples prepared in this example was tested, and it was found that compared with the product without nano thermal conductive filler dispersion (addition amount: 0g), after adding nano thermal conductive fille...

Embodiment 2

[0032]90g of polyethylene glycol monomethacrylate with an average molecular weight of 2000, 0g or 1g of photoinitiator 2-hydroxyl-2-methyl-1-phenylacetone (Irgacure-1173), 5g of nano-aluminum nitride were dispersed Add the solution to 10g of polyethylene glycol monoacrylate with an average molecular weight of 1000, stir evenly, then pour the above precursor into the mold, and cure it under LED light with a wavelength of 320nm and a power of 10W for 5min to obtain photocurable polyethylene glycol. Diol-based phase change energy storage materials. The aluminum nitride particle size in the nano-aluminum nitride dispersion liquid is 100nm, the dispersed phase is polyethylene glycol with a molecular weight of 600, and the mass concentration of the dispersion liquid is 20%. The thermal conductivity of the sample prepared in this embodiment was tested, and it was found that the thermal conductivity of the prepared material was increased by 12.4 times after adding the dispersion liqui...

Embodiment 3

[0034] 80g of polyethylene glycol monoacrylate with an average molecular mass of 3000, 2g of photoinitiator 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1 - Acetone (Irgacure-907), 0g or 1g nanometer graphene oxide dispersion liquid is added in the methoxypolyethylene glycol monoacrylate of 20g average molecular weights 600, stir well, then above-mentioned precursor is poured in the mould, in Curing under ultraviolet light with a wavelength of 305nm and a power of 5kW for 2 minutes can obtain a photocurable polyethylene glycol-based phase-change energy storage material. The graphene oxide particle size in the nanometer graphene oxide dispersion is 20nm, the dispersed phase is polyethylene glycol with a molecular weight of 800, and the mass concentration of the dispersion is 30%. The thermal conductivity of the sample prepared in this embodiment was tested, and it was found that the thermal conductivity of the prepared material increased by 13.8 times after adding the di...

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Abstract

The invention belongs to the technical field of phase-change energy storage materials, in particular to a thermoplastic polyethylene glycol-based phase-change energy storage material and its preparation method and application. The method comprises the following steps: according to the mass ratio, dissolving high molecular weight solid monoacrylated polyethylene glycol, an initiator, and nanometer thermally conductive filler dispersion in low molecular weight liquid monoacrylated polyethylene glycol, stirring homogeneous, the precursor of the phase change energy storage material is obtained; the precursor is solidified and molded to obtain the thermoplastic polyethylene glycol-based phase change energy storage material. The raw materials selected for the preparation of thermoplastic polyethylene glycol-based phase-change energy storage materials in the present invention are monoacrylated polyethylene glycols with different molecular weights, and the molecular structure is that an acrylic acid molecule is connected to one end of the polyethylene glycol molecular chain, so After curing and molding, the content of substances other than polyethylene glycol in the phase change energy storage material is extremely low, thereby reducing the phase change enthalpy of polyethylene glycol to a minimum, and thus can be widely used in the field of thermal energy storage.

Description

technical field [0001] The invention belongs to the technical field of phase-change energy storage materials, in particular to a thermoplastic polyethylene glycol-based phase-change energy storage material and its preparation method and application. Background technique [0002] A phase change energy storage material (PCM, phase change material) refers to a substance that absorbs or releases phase change heat in the process of biological phase transformation, thereby storing energy and regulating and controlling the ambient temperature. This kind of material has become a research hotspot in energy utilization and material science at home and abroad because it can solve the contradiction between energy supply and demand in time and space. Phase change energy storage materials have broad application prospects in aerospace, building energy conservation, solar energy utilization, power peak shaving, waste heat utilization, cold chain transportation, coating industry, textile ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/28C08F2/48C08G81/00C09K5/06
CPCC08F283/065C08F2/48C08G81/00C09K5/063C08F220/286Y02E70/30
Inventor 袁腾杨卓鸿周伟建李朋松符传杰
Owner SOUTH CHINA AGRI UNIV
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