Compound polyethylene glycol phase change material

A phase-change energy storage material, polyethylene glycol technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., to achieve the effects of no special smell, long service life and good compatibility

Active Publication Date: 2012-06-27
PANJIN KELONG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The coating material is expanded perlite po

Method used

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  • Compound polyethylene glycol phase change material
  • Compound polyethylene glycol phase change material

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Add 160 kg of expanded perlite powder (particle size 0.15.mm-1.18mm) and about 500 kg of PEG 600 into a 3 cubic meter vacuum reactor at room temperature, and then stir at a speed of about 80r / min. After 10 minutes, vacuumize the reactor to about 10kPa with a water ring vacuum pump, close the exhaust valve, and keep stirring under vacuum for 40 minutes. Close the exhaust valve, open the vent valve, let the air enter the reactor, and keep it for 20 minutes, so that the PEG on the surface of the expanded perlite will enter its micropores under the action of the air pressure difference, and the unadsorbed PEG 600 will be filtered out. Then add 1000 kg of 10% dimethylol dihydroxy ethylene urea and 3% MgCl in the reactor 2 / citric acid mixed catalyst aqueous solution, through the jacket of the reactor, the temperature is slowly raised to 60°C and kept for 15 minutes for cross-linking reaction, kept at 90°C for 8 minutes, after cooling, the surface of the expanded perlite is ...

Embodiment 2

[0025] Add 300 kg of diatomaceous earth (325 mesh) and about 500 kg of PEG 400 into a 3 cubic meter vacuum reactor at room temperature, and then stir at a speed of about 80r / min. After 10 minutes, vacuumize the reactor to about 10kPa with a water ring vacuum pump, close the exhaust valve, and keep stirring under vacuum for 40 minutes. Close the exhaust valve, open the vent valve, let the air enter the reactor, and keep it for 20 minutes, so that the PEG on the surface of the diatomite will enter its micropores under the action of the air pressure difference, and filter out the unadsorbed PEG 600. Then add 1000 kg of 10% dimethylol dihydroxy ethylene urea and 3% MgCl in the reactor 2 / citric acid mixed catalyst aqueous solution, through the jacket of the reactor, the temperature is slowly raised to 60°C and kept for 15 minutes for cross-linking reaction, kept at 90°C for 8 minutes, after cooling, the surface of the diatomite obtained is covered with dimethyloldihydroxyethylene ...

Embodiment 3

[0029] Add 700 kg of zeolite powder (100 mesh) to a 3 cubic meter vacuum reactor at room temperature. Then, the reactor was heated to 40°C with a jacket. About 700 kg of PEG 800, after heating to its melting point, is added into the reaction kettle, and stirred and mixed evenly at a speed of about 80r / min. After 10 minutes, vacuumize the reactor to about 10kPa with a water ring vacuum pump, close the exhaust valve, and keep stirring under vacuum for 40 minutes. Close the exhaust valve, open the vent valve, let the air enter the reactor, and keep it for 20 minutes, so that the PEG on the surface of the zeolite will enter its micropores under the action of the air pressure difference, and the unadsorbed PEG 600 will be filtered out. Then add 1000 kg of 10% dimethylol dihydroxy ethylene urea and 3% MgCl in the reactor 2 / citric acid mixed catalyst aqueous solution, through the jacket of the reactor, slowly raise the temperature to 60°C and keep it for 15 minutes for crosslinkin...

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Abstract

The invention relates to a compound polyethylene glycol phase change material, which can be applied to internal wall thermal insulation in the field of construction. In the compound polyethylene glycol phase change material, a used phase change material is adsorbed inside a porous carrier, and a crosslinking agent, a phase change energy storage material and a porous carrier surface are subjected to a crosslinking reaction for sealing holes, so that contents are prevented from draining away. Polyethylene glycol is taken as a phase change energy storage material; expanded perlite powder, zeolite powder, diatomite and the like are taken as porous absorption carriers; and dihydroxytoluene dyhydroxy vinyl urea is taken as a crosslinking agent. The material has high compatibility, no corrosion, no toxicity, no particular smell, high calorific potential, low super-cooling degree and long service life; and through chemical crosslinking curing with a polyethylene glycol phase change energy storage material and micro holes blocking, the thermal stability of the material can be further enhanced.

Description

technical field [0001] The invention relates to a phase change energy storage material in the field of fine chemical industry, in particular to a composite polyethylene glycol phase change energy storage material. Background technique [0002] In patents CN201010541388.8 and CN201010541388.8, inorganic salt hydrates are used as phase change materials. Although the price of inorganic salt hydrate is relatively low, it will cause phase separation and supercooling during use, so it is not suitable for long-term use. For the encapsulation of phase change materials, some inventions use the microcapsule method (CN201010514415.2), and also use porous materials such as expanded graphite (CN200810156153.X) for adsorption and fixation, and in the patent CN03116286.X, expanded clay is used as the adsorbent. Encapsulation with microcapsules will lead to a significant increase in production costs and increase the threshold for use. However, when adsorbed with a porous material, the pha...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 安靖东姜艳王笑衡
Owner PANJIN KELONG FINE CHEM
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