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Preparation method of polyethylene glycol microcapsule used as composite phase change and energy storage material

A polyethylene glycol, phase change energy storage technology, applied in microcapsule preparations, microsphere preparation, heat exchange materials, etc. The effect of low requirements and simple process

Inactive Publication Date: 2013-10-09
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] And because polyethylene glycol is very soluble in water, also soluble in common organic solvents such as benzene, toluene, methylene chloride, ethanol, it is difficult to adopt the usual method to its microencapsulation, making the application of polyethylene glycol Development is very limited

Method used

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  • Preparation method of polyethylene glycol microcapsule used as composite phase change and energy storage material
  • Preparation method of polyethylene glycol microcapsule used as composite phase change and energy storage material
  • Preparation method of polyethylene glycol microcapsule used as composite phase change and energy storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare the quality of each component of polyethylene glycol / ethyl cellulose microcapsule as follows:

[0021]

[0022] The preparation method of polyethylene glycol / ethyl cellulose microcapsules is as follows:

[0023] (1) Heat 6.6g of polyethylene glycol 1500 into a liquid state and add it into 50g of carbon tetrachloride dissolved in 2g of ethyl cellulose, and ultrasonically vibrate for 60min to form a mixed solution;

[0024] (2) Take 100g of liquid paraffin with a melting point of 17°C in a three-necked flask, stir at a speed of 100rpm, and control the temperature at 30°C;

[0025] (3) The mixed solution obtained in (1) is dripped into the liquid paraffin in (2) at a speed of 1.5mL / min, after dripping, continue to stir for 120min, and keep the temperature and stand for 120min;

[0026] (4) down to room temperature, suction filtration, washing with normal hexane, drying, removing liquid paraffin and normal hexane on the surface of microcapsules, washing with wat...

Embodiment 2

[0029] Prepare the quality of each component of polyethylene glycol / ethyl cellulose microcapsule as follows:

[0030]

[0031] The preparation method of polyethylene glycol / ethyl cellulose microcapsules is as follows:

[0032] (1) Heat 11.0 g of polyethylene glycol 1500 into a liquid state, add 2.0 g of ethyl cellulose to 80 g of carbon tetrachloride, and ultrasonically vibrate for 60 minutes to form a mixed solution;

[0033] (2) Take 150 g of liquid paraffin with a melting point of 17° C. in a three-necked flask, stir at a speed of 1500 rpm, and control the temperature at 30° C.;

[0034] (3) Drop the mixed solution obtained in (1) into the liquid paraffin in (2) at a rate of 1.0 mL / min, continue to stir for 120 min after dripping, and keep the temperature for 120 min;

[0035] (4) down to room temperature, suction filtration, washing with n-hexane, drying, removing liquid paraffin and n-hexane on the surface of microcapsules, washing with water, removing polyethylene gl...

Embodiment 3

[0038] Prepare the quality of each component of polyethylene glycol / ethyl cellulose microcapsule as follows:

[0039]

[0040] The preparation method of polyethylene glycol / ethyl cellulose microcapsules is as follows:

[0041] (1) Heat 1.0 g of polyethylene glycol 800 into a liquid state, add it into 30 g of carbon tetrachloride dissolved in 1.0 g of ethyl cellulose, and ultrasonically vibrate for 60 minutes to form a mixed solution;

[0042] (2) Take 50 g of liquid paraffin with a melting point of 14°C in a three-necked flask, stir at a speed of 500 rpm, and control the temperature at 25°C;

[0043] (3) Drop the mixed solution obtained in (1) into the liquid paraffin in (2) at a rate of 1.0 mL / min, continue to stir for 120 min after dripping, and keep the temperature for 120 min;

[0044] (4) down to room temperature, suction filtration, washing with n-hexane, drying, removing liquid paraffin and n-hexane on the surface of microcapsules, washing with water, removing polye...

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Abstract

The invention discloses a preparation method of a polyethylene glycol microcapsule used as a composite phase change and energy storage material. The polyethylene glycol / ethyl cellulose microcapsule is prepared according to a principle of preparing the microcapsule through an organic phase separation method. The method provided by the invention is simple in process, few in involved raw material types, high in efficiency, and environmentally protective. The polyethylene glycol / ethyl cellulose microcapsule prepared by the invention changes phases in a certain temperature range to absorb or release heat, and can be used as an energy storage, temperature adjustment and phase transition material. Through changing ratio of the raw materials, a cladding rate of the polyethylene glycol in the microcapsule can be modified, thereby meeting a plurality of energy storage and temperature adjustment requirements; through adjusting technology conditions, the microcapsule with different particle sizes can be prepared, thereby meeting requirements of different application areas.

Description

technical field [0001] The invention belongs to a method for preparing polyethylene glycol / ethyl cellulose microcapsules that can be used as energy storage temperature-regulating phase-change materials, and particularly relates to the preparation of core materials soluble in solvents by referring to the technology of preparing microcapsules by organic phase separation method Preparation method of polyethylene glycol / ethylcellulose microcapsules. Background technique [0002] The organic phase separation method is a traditional technology for preparing microcapsules. Its principle is to select mutually immiscible core materials and wall materials, miscible solvents and non-solvents, and the core materials are neither soluble in solvents nor non-solvents, The wall material is only soluble in the solvent and insoluble in the non-solvent; the core material is dispersed into the solvent with the wall material in the form of small solid particles or droplets to form an emulsion, a...

Claims

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Application Information

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IPC IPC(8): B01J13/06C09K5/06
Inventor 汪树军李彦山梁文章刘红研朱思佳郑万刚孟凡宾徐洵
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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