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Preparation method of phase transformation material for microcapsult packing and forming

A technology of shape-setting phase change materials and composite phase change materials, which is applied in the direction of microcapsule preparation, microsphere preparation, heat exchange materials, etc., to achieve the effects of easy availability of raw materials, improvement of hydrophilic performance, and simple preparation process

Inactive Publication Date: 2005-08-24
北京巨龙博方科学技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At present, the further microencapsulation of shape-changing phase change materials has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Preparation of Shaped Phase Change Materials

[0047] (1) Install a thermometer, a spherical reflux condenser, a constant pressure dropping funnel, and a stirrer in a 250ml four-necked flask, and use a temperature-controlled electric heating mantle as a heat source.

[0048] (2) Add accurately measured 10.00 g of polystyrene and 2.00 g of polyethylene in a four-necked flask, and add accurately measured 12.00 g (50%) of industrial paraffin wax with a melting point of 17° C. in a constant pressure dropping funnel.

[0049] (3) Turn on the reflux of condensed water, and turn on the electric heating mantle to heat at the same time, start stirring when the temperature rises to 250°C, and stir for 30 minutes to completely melt the polystyrene and polyethylene.

[0050] (4) Stir at 250°C and then add paraffin wax dropwise. After the dropwise addition, continue to heat up to 280°C and maintain this temperature for 10 minutes. Cool down to 150°C and discharge.

[0051] (5) ...

Embodiment 2

[0061] 1. Preparation of Shaped Phase Change Materials

[0062] (1) Install a thermometer, a spherical reflux condenser, a constant pressure dropping funnel, and a stirrer in a 250ml four-necked flask, and use a temperature-controlled electric heating mantle as a heat source.

[0063] (2) Add accurately metered 1.50g of polystyrene and 0.50g of polyethylene in a four-neck flask, and add accurately metered 18.00g (50%) of industrial paraffin wax with a melting point of 17°C in a constant pressure dropping funnel.

[0064] (3) Turn on the reflux of condensed water, and turn on the electric heating mantle to heat at the same time, start stirring when the temperature rises to 250°C, and stir for 30 minutes to completely melt the polystyrene and polyethylene.

[0065] (4) Stir at 250°C and then add paraffin wax dropwise. After the dropwise addition, continue to heat up to 280°C and maintain this temperature for 10 minutes. Cool down to 150°C and discharge.

[0066] (5) When cooli...

Embodiment 3

[0076] 1. Preparation of Shaped Phase Change Materials

[0077] (1) Install a thermometer, a spherical reflux condenser, a constant pressure dropping funnel, and a stirrer in a 250ml four-necked flask, and use a temperature-controlled electric heating mantle as a heat source.

[0078] (2) Add accurately measured 2.0 g polystyrene and 2.0 g polyethylene in a four-neck flask, and add accurately measured 16.00 g (50%) industrial paraffin wax with a melting point of 17° C. in a constant pressure dropping funnel.

[0079] (3) Turn on the reflux of condensed water, and turn on the electric heating mantle to heat at the same time, start stirring when the temperature rises to 250°C, and stir for 30 minutes to completely melt the polystyrene and polyethylene.

[0080] (4) Stir at 250°C and then add paraffin wax dropwise. After the dropwise addition, continue to heat up to 280°C and maintain this temperature for 10 minutes. Cool down to 150°C and discharge.

[0081] (5) When cooling t...

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Abstract

A phase-changing material in the form of micro capsule is prepared from the phase-changing material (paraffin wax) and basic supporting material (polystyrene and polyethene) through heating for fusing, mixing for coating, and microcapsule packing by in-situ polymerizing by melamine modified urea-aldehyde resin. It has adjustable phase-changing temp (0-70 deg.C) and high phase-changing enthalpy (138 KJ / kg).

Description

technical field [0001] The invention belongs to a phase change heat storage composite material and a preparation method thereof, in particular to a new preparation method of microcapsule encapsulation of a shape-fixed phase change material. technical background [0002] Due to the solid-liquid transformation of phase change materials during work, which brings a lot of inconvenience to practical applications, researchers initially adopted the method of container packaging. The method of container encapsulation is limited to some applications, and phase change materials used in different fields need to be designed specifically, which brings great inconvenience to practical applications. On the other hand, the design and manufacturing cost of the container is very high, and there is a problem of corrosion to the container. This has led researchers to consider microencapsulation of phase change materials. [0003] In 1997, Royon et al. used water as the phase change material a...

Claims

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Application Information

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IPC IPC(8): B01J13/02C09K5/02
Inventor 汪树军刘星孙国林韩晋民刘红研张伟
Owner 北京巨龙博方科学技术研究院
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