Phase change material microcapsule coating method and application

A technology of phase change materials and microcapsules, which is applied in the preparation of microcapsule preparations and microspheres, can solve the problems of poor biocompatibility, high cost, and cumbersome steps, and achieve the effects of low cost, easy method, and wide sources

Inactive Publication Date: 2019-06-25
湖州闪思新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have disadvantages such as cumbersome steps, poor biocompatibility, and high cost.

Method used

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  • Phase change material microcapsule coating method and application
  • Phase change material microcapsule coating method and application
  • Phase change material microcapsule coating method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The specific embodiment of the Pickering emulsion coated phase change material paraffin prepared with cellulose nanocrystal as emulsifier is as follows:

[0030] 1) Disperse the cellulose nanocrystals (CNC) in deionized water by homogenizing with a homogenizer or ultrasonically pulverizing with a cell pulverizer to prepare a water suspension with a concentration mass fraction of 0.1%, 0.2% or 0.5%, and then add A certain amount of salt, such as sodium chloride, etc., the concentration of the salt is 0.1 to 1.5wt.%. The dispersion is used as the aqueous phase of the Pickering emulsion;

[0031] 2) The oil phase of the Pickering emulsion was 12 grams of paraffin, and then 40 grams of the above-mentioned cellulose nanocrystal dispersion was added as the water phase. The melting point of paraffin wax used here is 58 to 62 ° C, and the differential scanning calorimetry (DSC) curve of this paraffin wax is as attached figure 1 shown. According to this DSC curve, the melting ...

Embodiment 2

[0040] Taking the Pickering emulsion stabilized by cellulose nanocrystals as a template and adopting Pickering emulsion polymerization to prepare specific examples of polystyrene-coated microcapsules are as follows:

[0041] 1) Disperse the cellulose nanocrystals in deionized water by homogenizing with a homogenizer or ultrasonically pulverizing with a cell pulverizer to prepare a water suspension with a concentration mass fraction of 0.5%, and use this dispersion as the water of the Pickering emulsion Mutually;

[0042] 2) The oil phase of the Pickering emulsion is a mixture of 1.8 gram styrene, 0.2 gram divinylbenzene and 10 gram paraffin, then add the dispersion liquid of 38 gram above-mentioned cellulose nanocrystals as water phase;

[0043] 3) The mixture was heated to 70° C., and nitrogen gas was introduced for 30 minutes, and then 20 mg of azobisisobutyronitrile was added;

[0044] 4) Under the protection of nitrogen, the above-mentioned mixed solution was ultrasonical...

Embodiment 3

[0055] Taking the Pickering emulsion stabilized by cellulose nanocrystals as a template and adopting Pickering emulsion polymerization to prepare polymethyl methacrylate (PMMA) coated microcapsules The specific examples are as follows:

[0056] 1) Disperse the cellulose nanocrystals in deionized water by homogenizing with a homogenizer or ultrasonically pulverizing with a cell pulverizer to prepare a water suspension with a concentration mass fraction of 0.5%, and use this dispersion as the water of the Pickering emulsion Mutually;

[0057] 2) The oil phase of the Pickering emulsion is a mixture of 1.8 gram methyl methacrylate, 0.2 gram divinylbenzene and 10 gram paraffin, then add the dispersion liquid of 38 gram above-mentioned cellulose nanocrystals as water phase;

[0058] 3) The mixture was heated to 70° C., and nitrogen gas was introduced for 30 minutes, and then 20 mg of azobisisobutyronitrile was added;

[0059] 4) Under the protection of nitrogen, the above-mentioned...

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Abstract

The invention relates to a phase change material microcapsule coating method and application. The method adopts cellulose nanocrystal stabilized Pickering emulsion as the template, and carries out Pickering emulsion polymerization, or sol-gel reaction, etc. to prepare a shell of organic polymer or inorganic oxide, thus realizing coating of an organic phase change material, and obtaining an organicpolymer or inorganic oxide coated organic phase change material microcapsule. The microcapsule with coated phase change material can be applied to buildings, textiles, hot compress, vacuum cups, rechargeable hand warmers and other fields to realize storage, conversion and the like of heat energy. In addition, by adding other reagents into the edible phase change material coconut oil, the preparedphase change material Pickering emulsion or microcapsule can be applied to temperature controlled drug controlled release, etc.

Description

technical field [0001] The invention relates to the field of material preparation and application, in particular to a preparation method and application of phase change material microcapsule coating. Background technique [0002] With the development of society, the energy problems and environmental problems we are facing are getting worse day by day. Currently, one-third of the world's energy is used in cooling and heating buildings to maintain a suitable temperature in the building, which consumes a lot of energy. The application of phase change materials in architecture is expected to solve this problem. Phase change materials are materials in which energy is stored in the form of latent heat. Water is the most common phase-change material. 1 kg of water at 0°C can be turned into ice at 0°C, which can release 333 kilojoules of heat, which is enough to heat 1 kg of water at 1°C to 80°C. It can be seen that phase change materials can store or release a large amount of he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/18
Inventor 张博雅张旭李东明张颜史少伟刘大鹏李营战张妞陆荣郑
Owner 湖州闪思新材料科技有限公司
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