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Preparation method of phase transformation material microcupsule

A phase-change material and microcapsule technology, which is applied in the direction of microcapsule preparation, microsphere preparation, heat exchange materials, etc., to achieve the effects of convenient operation, enhanced mechanical strength, and simple preparation process

Inactive Publication Date: 2007-10-03
HUILIN SHENGDA ENERGY MATERIAL SCI & TECH DEV BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At present, there is no report on the double-layer microcapsule encapsulation of paraffin by combined interfacial polymerization and in situ polymerization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Preparation of urea-formaldehyde resin prepolymer.

[0050] Prepare the component mass fraction of urea-formaldehyde resin prepolymer as follows:

[0051] Urea 100

[0052] 37% formaldehyde solution 200

[0053] Triethanolamine 0.6

[0054] The preparation method of urea-formaldehyde resin prepolymer is as follows

[0055] (1) Add urea, formaldehyde, and triethanolamine into the reaction kettle, and start stirring to completely dissolve the urea.

[0056] (2) Turn on reflux of condensed water, heat the reactor to 80° C., maintain the reaction for 1 hour, and cool down to room temperature. The product is a urea-formaldehyde resin prepolymer.

[0057] 2. Paraffin wax wrapped in double-layer microcapsules.

[0058] The composition mass fraction of double-layer microcapsule wrapped paraffin is as follows:

[0059] Paraffin (melting point 4°C) 100

[0060] Urea-formaldehyde resin prepolymer 200

[0061] OP emulsifier 0.2

[0062] Toluene diisocyanate 15

[0063]...

Embodiment 2

[0073] 1. Preparation of urea-formaldehyde resin prepolymer.

[0074] Prepare the component mass fraction of urea-formaldehyde resin prepolymer as follows:

[0075] Urea 120

[0076] 37% formaldehyde solution 220

[0077] Triethanolamine 0.2

[0078] The preparation method of urea-formaldehyde resin prepolymer is as follows

[0079] (1) Add urea, formaldehyde, and triethanolamine into the reaction kettle, and start stirring to completely dissolve the urea.

[0080] (2) Turn on reflux of condensed water, heat the reactor to 80° C., maintain the reaction for 1 hour, and cool down to room temperature. The product is a urea-formaldehyde resin prepolymer.

[0081] 2. Paraffin wax wrapped in double-layer microcapsules.

[0082] The composition mass fraction of double-layer microcapsule wrapped paraffin is as follows:

[0083] Paraffin (melting point 17°C) 100

[0084] Urea-formaldehyde resin prepolymer 200

[0085] Tween emulsifier 0.6

[0086] Toluene diisocyanate 30

[0...

Embodiment 3

[0097] 1. Preparation of urea-formaldehyde resin prepolymer.

[0098] Prepare the component mass fraction of urea-formaldehyde resin prepolymer as follows:

[0099] Urea 100

[0100] 37% formaldehyde solution 200

[0101] Triethanolamine 0.6

[0102] The preparation method of urea-formaldehyde resin prepolymer is as follows

[0103] (1) Add urea, formaldehyde, and triethanolamine into the reaction kettle, and start stirring to completely dissolve the urea.

[0104] (2) Turn on reflux of condensed water, heat the reactor to 80° C., maintain the reaction for 1 hour, and cool down to room temperature. The product is a urea-formaldehyde resin prepolymer.

[0105] 2. Paraffin wax wrapped in double-layer microcapsules.

[0106] The composition mass fraction of double-layer microcapsule wrapped paraffin is as follows:

[0107] Paraffin (melting point 17°C) 100

[0108] Urea-formaldehyde resin prepolymer 200

[0109] SP emulsifier 0.5

[0110] water 100

[0111] Toluene diis...

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Abstract

This invention relates to preparation method of a facies change stuff microcapsule. It takes paraffin as phase-change material, takes toluene diisocyanate and urea-formaldehyde resin as cyst wall stuff, by interfacial polymerization and in situ polymeric method to carry out microencapsulate, to prepare double deck, microcapsule packed paraffin phase-change material. This method could prepare microcapsule phase-change material that contain any specification paraffin from 1% to 70%. Transformation temperature of this phase-change material is adjustable from 0 to 70 deg.C. This compound phase-change material can directly apply to construction region, textile region, and martial region and so on.

Description

technical field [0001] The invention belongs to a functional heat storage microcapsule phase change material and a preparation method thereof, in particular to a preparation method of paraffin wax wrapped in double-layer microcapsules. 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 and po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04B01J13/14
Inventor 汪树军刘星刘红研徐志军赵飞明
Owner HUILIN SHENGDA ENERGY MATERIAL SCI & TECH DEV BEIJING
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