Super-hydrophobic microcapsule made from phase-change materials and preparation method of super-hydrophobic microcapsule

A technology of phase change materials and microcapsules, which is applied in the field of superhydrophobic microcapsules of phase change materials and its preparation, and coating of phase change materials. , complex polymer process and other issues, to achieve excellent thermal stability, excellent thermal storage and release capabilities, and easy mass production

Inactive Publication Date: 2015-09-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent (CN1161364A) discloses a phase-change energy storage material microcapsule using melamine resin as the shell layer, but because the melamine resin is relatively brittle, the prepared phase-change energy storage material microcapsule has poor mechanical properties and poor durability
Chinese patent (CN200910105980.0) proposes a preparation method of phase-change energy storage microcapsules coated with organic polymer materials, using organic polymer materials as wall materials to prepare regular shape, good dispersion, and particle size distribution through emulsion polymerization. Uniform phase change energy storage microcapsule material with good capsule wall sealing and good chemical stability; however, there are many kinds of additives used in this method and the amount is large, so there are many residual impurities in the product and the process is complicated
However, the microcapsules obtained by this method do not have superhydrophobicity, and the process of separating out polymers is complicated, requiring the addition of demulsifiers or coagulants, and there are many types of additives, and the impurity removal process is complicated.

Method used

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  • Super-hydrophobic microcapsule made from phase-change materials and preparation method of super-hydrophobic microcapsule
  • Super-hydrophobic microcapsule made from phase-change materials and preparation method of super-hydrophobic microcapsule
  • Super-hydrophobic microcapsule made from phase-change materials and preparation method of super-hydrophobic microcapsule

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Embodiment 1

[0031] A preparation method of phase-change material superhydrophobic microcapsules, comprising the following steps:

[0032] Step 1. Preparation of the shell material prepolymer: Mix 2.5 g of urea and 6.33 g of 37% formaldehyde aqueous solution by mass percentage, adjust its pH to 8 with 1 mol / L sodium hydroxide aqueous solution, and stir and react at 70° C. for 1 h. A colorless transparent liquid is obtained, which is the aqueous solution of the shell material urea-formaldehyde prepolymer; the mass ratio of urea to 37% formaldehyde aqueous solution is 1:2.532;

[0033] Step 2. Preparation of the core material: Heat, stir and mix 9g of octadecane and 1g of hexamethylene diisocyanate at 50°C for 30 minutes until uniform and transparent to obtain the core material; the mass ratio of octadecane to hexamethylene diisocyanate 9:1;

[0034] Step 3, the preparation of microcapsules: the whole urea-formaldehyde prepolymer aqueous solution that step 1 obtains and 75mL containing the ...

Embodiment 2

[0040] A preparation method of phase-change material superhydrophobic microcapsules, comprising the following steps:

[0041] Step 1. Preparation of the shell material prepolymer: Mix 2.5 g of urea and 6.33 g of 37% formaldehyde aqueous solution by mass percentage, adjust its pH to 8 with 1 mol / L sodium hydroxide aqueous solution, and stir and react at 70° C. for 1 h. A colorless transparent liquid is obtained, which is the aqueous solution of the shell material urea-formaldehyde prepolymer; the mass ratio of urea to 37% formaldehyde aqueous solution is 1:2.532;

[0042] Step 2. Preparation of the core material: Heat, stir and mix 9g of octadecane and 1g of hexamethylene diisocyanate at 50°C for 30 minutes until uniform and transparent to obtain the core material; the mass ratio of octadecane to hexamethylene diisocyanate 9:1;

[0043] Step 3, the preparation of microcapsules: the whole urea-formaldehyde prepolymer aqueous solution that step 1 obtains and 75mL containing the ...

Embodiment 3

[0049] A preparation method of phase-change material superhydrophobic microcapsules, comprising the following steps:

[0050]Step 1. Preparation of the shell material prepolymer: Mix 2.5 g of urea and 6.33 g of 37% formaldehyde aqueous solution by mass percentage, adjust its pH to 8 with 1 mol / L sodium hydroxide aqueous solution, and stir and react at 70° C. for 1 h. A colorless transparent liquid is obtained, which is the aqueous solution of the shell material urea-formaldehyde prepolymer; the mass ratio of urea to 37% formaldehyde aqueous solution is 1:2.532;

[0051] Step 2. Preparation of the core material: Heat, stir and mix 9g of octadecane and 1g of hexamethylene diisocyanate at 50°C for 30 minutes until uniform and transparent to obtain the core material; the mass ratio of octadecane to hexamethylene diisocyanate 9:1;

[0052] Step 3, preparation of microcapsules: the whole urea-formaldehyde prepolymer aqueous solution obtained in step 1 and 75mL have a mass percent c...

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Abstract

The invention relates to a super-hydrophobic microcapsule made from phase-change materials and a preparation method of the super-hydrophobic microcapsule, and belongs to the technical field of the preparation of functional materials. The super-hydrophobic microcapsule made from phase-change materials comprises a capsule core and a capsule shell of which the external surface is provided with a micro nanometer multi-level structure, wherein according to the mass percentage, the content of the capsule core accounts for 60-90wt%, and the content of the capsule shell of which the external surface is provided with the micro nanometer multi-level structure accounts for 10-40wt%; the average diameter of the microcapsule is 10-1000 [mu] m, the average thickness of the capsule shell is 100-500 nm, and the average diameter of particles on the external surface of the capsule shell is 150-650 nm. The super-hydrophobic microcapsule made from the phase-change materials, obtained by the invention, has the advantages of controllable structure, high content of core materials, high super-hydrophobicity, good heat stability and the like; the preparation technology of the microcapsule is simple and environment-friendly, is convenient to operate and is wide in application range; raw materials are low in price and easy to obtain, so that the industrial mass production and application are easy to realize.

Description

technical field [0001] The invention relates to a phase-change material coating technology, in particular to a phase-change material superhydrophobic microcapsule and a preparation method thereof, belonging to the technical field of functional material preparation. Background technique [0002] Phase Change Material (Phase Change Material) is a substance that can absorb or release a large amount of latent heat of phase change by changing its own phase to maintain a constant or little change in temperature, and has good energy storage and temperature control capabilities. As a new type of energy-saving material, phase change materials have been widely used in aerospace suits, architectural coatings, textile coatings, refrigeration control and other fields. Phase change materials can be divided into two categories: organic and inorganic. Organic phase change materials include alkanes, alkyds, and polymers. Among them, organic alkane phase change materials have the advantages ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/02
Inventor 吴刚崔君怡胡琮瑾叶涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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