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Polyether-based composite phase change energy storage material and preparation method thereof

A technology of composite phase change and energy storage materials, applied in the field of polyether-based composite phase change energy storage materials and their preparation, can solve problems such as affecting use, and achieve the effects of strong practicability, simple synthesis process and high thermal conductivity

Active Publication Date: 2019-03-22
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since polyethylene glycol is in an environment higher than the phase transition temperature, a phase transition will occur: from solid phase to liquid phase, resulting in flow and affecting use

Method used

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  • Polyether-based composite phase change energy storage material and preparation method thereof
  • Polyether-based composite phase change energy storage material and preparation method thereof
  • Polyether-based composite phase change energy storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] (1) Polyethylene glycol with an average molecular weight of 6000 and methoxypolyethylene glycol methacrylate with an average molecular weight of 2000 are mixed in the reactor according to a mass ratio of 3:7, and the N 2 , mechanically stirred, the reactor was heated in an 80°C oil bath, and stirred at a constant temperature for 0.5h.

[0073] Wherein, the mass percent concentration of methoxypolyethylene glycol methacrylate with an average molecular weight of 2000 is 50%.

[0074] (2) Initiator BPO is added in the reactor, initiator and methoxypolyethylene glycol methacrylate are added according to mass ratio 18:1000 ratio, pass N 2 , stirring, after 20min, when the inside of the reactor is under N 2 environment, stop passing N 2 , and continue stirring for 2h to obtain a phase change material.

[0075] (3) During this reaction, the graphene is dispersed in the solvent, the solvent is water, mixed according to the ratio of mass ratio 1:20, ultrasonically stirred, af...

Embodiment 2-6

[0081] It is 300,500,950,1500,4000 that the methoxy polyethylene glycol methacrylate that the average molecular weight is 2000 is replaced by the methoxy polyethylene glycol methacrylate of 300,500,950,1500,4000, and initiator and average molecular weight are 300 , 500, 950, 1500, 4000 of methoxypolyethylene glycol methacrylate in a mass ratio of 9:1000, compounded to obtain a PEG / PPEGMA composite phase change energy storage material, and other conditions are consistent with Example 1. The phase change enthalpy of the obtained composite shape-setting phase change material is still about 170 J / g, and has the same high thermal stability as that of Example 1.

Embodiment 7-11

[0083] In Example 1, the polyethylene glycol with an average molecular weight of 6000 was replaced with polyethylene glycol with an average molecular weight of 1000, 2000, 4000, 8000, and 10000, and other conditions were consistent with those in Example 1. The phase transition temperature of the obtained material changes, and different molecular weight polyethylene glycols can be selected for compounding according to the different requirements of the use environment. The obtained material has excellent shape stability, energy storage density and thermal stability.

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Abstract

The invention relates to a polyether-based composite phase change material and a preparation method thereof, and belongs to the technical field of novel materials. The polyether-based composite phasechange material comprises the following components in percent by mass: 23-70% of a phase change supporting material, 1-7% of a carbon material and 30-75% of polyethylene glycol, wherein the phase change supporting material is a polyacrylate polymer, and a monomer structure of the olyacrylate polymer is as shown in the specification, wherein n is 5-90, m is 50-1000, R1 is -H or -CH3, and R2 is -CH3or -CH2CH3; and the carbon material is graphene or graphene oxide. The novel heat storage material is high in energy storage density, high in heat conductivity coefficient, good in heat stability, simple in synthesis technology and good in shaping performance, so that the novel heat storage material has very strong practicability.

Description

technical field [0001] The invention relates to a polyether-based composite phase-change energy storage material and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] As one of the main forms of energy, thermal energy plays an important role in human life and social production. However, due to the imbalance between supply and demand in thermal energy utilization, thermal energy storage technology has attracted more and more attention from researchers. As an energy storage carrier, phase change materials have the advantages of energy saving and environmental protection, but the low thermal conductivity and fluidity of materials after phase change limit their applications. [0003] Polyethylene glycol solid-liquid phase change heat storage materials have relatively large phase transition enthalpy, and polyethylene glycols with different molecular weights have different phase transition temperatures (25-70°C). Meanw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 唐炳涛赵跃珍张淑芬
Owner DALIAN UNIV OF TECH
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