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Process for synthesizing polyethylene glycol (PEG) phase change thermal insulation material

A phase change thermal insulation material and process technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of phase change material loss, increase in production costs, loss of material phase change thermal insulation performance, etc., to achieve strong hygroscopicity, low price effect

Active Publication Date: 2012-06-27
PANJIN KELONG FINE CHEM
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Problems solved by technology

Encapsulation with microcapsules will greatly increase the production cost and increase the threshold of use; while adsorbing with porous materials, after many cycles of cold and heat, the phase change materials will gradually be lost from the porous materials, resulting in the phase change of the material. lost

Method used

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  • Process for synthesizing polyethylene glycol (PEG) phase change thermal insulation material
  • Process for synthesizing polyethylene glycol (PEG) phase change thermal insulation material
  • Process for synthesizing polyethylene glycol (PEG) phase change thermal insulation material

Examples

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Embodiment Construction

[0010] 160 kilograms of expanded perlite powder (particle size 0.15.mm-1.18mm) and about 500 kilograms of PEG 600 were added to a 3 cubic meter vacuum reactor 1, added at room temperature and stirred at a rotational speed of about 80 r / min. Adsorption of PEG 600 by expanded perlite powder is done under vacuum. The vacuum degree of the reactor system is composed of a vacuum system composed of a water ring vacuum pump 2, a vacuum buffer tank 3 and a water ring vacuum pump vapor-liquid separation tank 1. The degree of vacuum in the reactor can be adjusted by the opening degree of the shut-off valve 14 on the vacuum buffer tank 3 . The pressure of the system can be read from the vacuum pressure gauge 15 on the vacuum buffer tank 3 . The water for vacuum sealing of the water ring vacuum pump 2 is provided by the process water pipeline 16 , and the water supply amount can be adjusted by the shut-off valve 17 . The liquid level of the water ring vacuum pump vapor-liquid separation ...

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Abstract

The invention relates to a process for preparing a composite phase change energy storage material. The composite phase change energy storage material is prepared by coating polyethylene glycol 600 (PEG600) in micropores of expanded perlite, and performing cross-linking reaction on free hydroxy of dimethylol dihydroxy ethylene urea resin and the PEG600 and on the surfaces of the micropores of the expanded perlite for hole sealing to prevent the PEG600 from being lost. The selected phase change energy storage material PEG600 has the phase change temperature of about 20 DEG C, and is non-toxic, harmless, and low in price; micropores on the surface of the phase change energy storage material coated material are sealed by a hole sealing agent, so that the packaged phase change energy storage material is prevented from being leaked; and in addition, porous expanded perlite powder is adopted, so that the material is high in moisture absorption property.

Description

technical field [0001] The invention relates to a production technology of an energy storage material, in particular to a process method of encapsulating a phase change energy storage material by a porous material adsorption method and sealing pores by a chemical crosslinking method. Background technique [0002] In patents CN201010541388.8 and CN201010541388.8, a method of using inorganic salt hydrate as a phase change material is disclosed. Although the price of inorganic salt hydrate is relatively low, it will appear phase separation, supercooling and other phenomena during use, which is not suitable for long-term use. For the encapsulation of phase change materials, some inventions use the microcapsule method, and porous materials such as expanded graphite are also used for adsorption and fixation. Encapsulation with microcapsules will greatly increase the production cost and raise the threshold for use; while using porous materials for adsorption, after repeated coolin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C08J3/24C08L71/00C08K5/21
Inventor 安靖东姜艳王笑衡
Owner PANJIN KELONG FINE CHEM
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