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Preparation method for high stable phase transition emulsion

A high-stability, emulsion technology, applied in the preparation of microspheres, chemical instruments and methods, microcapsule preparations, etc., to achieve the effect of simple and feasible process

Inactive Publication Date: 2012-10-10
广西星传教育科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few domestic researches on high-efficiency cold storage materials suitable for air-conditioning applications. Therefore, it will be of great practical significance and application value to develop a new type of high-efficiency cold storage material with suitable phase transition temperature, large phase transition latent heat, and durability.

Method used

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  • Preparation method for high stable phase transition emulsion
  • Preparation method for high stable phase transition emulsion
  • Preparation method for high stable phase transition emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Prepare the quality of each component of melamine resin paraffin microcapsule phase-change material emulsion as follows:

[0015]

[0016] The preparation method of melamine resin paraffin microcapsule phase change material emulsion is as follows:

[0017] (1) Add 9.7 g of melamine and 20.1 g of 37% formaldehyde solution into a four-neck flask, dropwise add 0.4 g of triethanolamine, adjust the pH value to 8-9, and stir and react at 70° C. for 30 minutes to prepare a melamine resin prepolymer;

[0018] (2) Prepare an aqueous solution containing 1.0 g of gelatin, add 0.7 g of OP-10 surfactant, heat and stir to prepare an aqueous phase solution;

[0019] (3) Add paraffin to the aqueous phase solution, shear and disperse with a shear emulsifier at a speed of 10,000 rpm for 7 minutes to obtain a paraffin emulsion, and transfer the emulsion and the melamine resin prepolymer to a four-necked flask;

[0020] (4) Connect the condensing reflux water device, add formic acid to...

Embodiment 2

[0024] Prepare the quality of each component of melamine resin paraffin microcapsule phase-change material emulsion as follows:

[0025]

[0026]

[0027] The preparation method of melamine resin paraffin microcapsule phase change material emulsion is as follows:

[0028] (1) Add 7.2 g of melamine and 14.2 g of 37% formaldehyde solution to a four-neck flask, dropwise add triethanolamine, adjust the pH value to 8-9, and stir and react at 70° C. for 30 minutes to prepare a melamine resin prepolymer;

[0029] (2) Prepare an aqueous solution containing 1.5 g of gelatin, add 0.24 g of sodium dodecylsulfonate, heat and stir to prepare an aqueous phase solution;

[0030] (3) Add paraffin to the aqueous phase solution, shear and disperse with a shear emulsifier at a speed of 7500 rpm for 8 minutes to obtain a paraffin emulsion, and transfer the emulsion and the melamine resin prepolymer to a four-necked flask;

[0031] (4) Connect the condensing reflux water device, add formic ...

Embodiment 3

[0035] Prepare the quality of each component of melamine resin paraffin microcapsule phase-change material emulsion as follows:

[0036]

[0037] The preparation method of the sulfur microcapsules that can be used as rubber vulcanizing agent is as follows:

[0038] (1) Add 12.2 g of melamine and 25.4 g of 37% formaldehyde solution into a four-neck flask, dropwise add triethanolamine, adjust the pH value to 8-9, and stir and react at 70° C. for 30 minutes to prepare a melamine resin prepolymer;

[0039] (2) Prepare an aqueous solution containing 1.5g gum arabic, add 0.15g sodium dodecylsulfonate surfactant, heat and stir to prepare an aqueous phase solution;

[0040] (3) Add paraffin to the aqueous phase solution, shear and disperse with a shear emulsifier at a speed of 12,500 rpm for 7 minutes to obtain a paraffin emulsion, and transfer the emulsion and the melamine resin prepolymer to a four-necked flask;

[0041] (4) Connect the condensing reflux water device, add formic...

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Abstract

The invention discloses a preparation method for a high stable paraffin melamine resin microcapsule emulsion which can be used for phase variable temperature. The method comprises the following steps: preparing a paraffin melamine resin microcapsule product by adopting an in-situ polymerization method with paraffin as a phase transition core material and melamine resin as a capsule wall material; directly adding a compound emulsifier and deionized water to the microcapsule product suspension to obtain a mixed liquor, or adding a compound emulsifier and deionized water to the microcapsule product after the microcapsule product is filtrated and dried to obtain a mixed liquor; and stirring and dispersing the mixed liquor to prepare the paraffin melamine resin microcapsule phase transition material emulsion. Particle size of the paraffin melamine resin microcapsule phase transition material emulsion prepared in the invention is micron-sized, and the microcapsule content can reach 5-38%. The phase transition material emulsion has the advantages of stable property, high resistance to acid and base environment and big enthalpy of phase transition, and the phase transition material emulsion is not easily demixed. The phase transition material emulsion can be widely applied to fields of latent functionally thermal fluid, building energy-saving materials and thermal-storing, temperature-regulated textile materials and the like.

Description

technical field [0001] The invention belongs to a preparation method of a high-stability phase-change emulsion that can be used for phase-change temperature regulation, and particularly relates to a preparation method of a melamine resin paraffin microcapsule phase-change material emulsion. Background technique [0002] H.INABA and others first proposed the concept of using phase change emulsion as a new cold storage medium. He conducted some preliminary research on thermal properties, heat transfer and cold storage performance of an emulsion formula, and the results were very impressive. interested. Compared with the various cold storage methods mentioned above, the technical advantages and characteristics of the emulsion cold storage system are mainly: (1) the system has no pressure; (2) the material is non-toxic and non-corrosive, and the chemical structure is stable; (3) the cold storage density is relatively large, and the cold storage The temperature is completely con...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/18
Inventor 汪树军梁文章李杰刘红研高原冯文平
Owner 广西星传教育科技有限公司
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