Phase change energy storage microcapsule taking polyurethane modified organic silicon resin as shell material and preparation method of phase change energy storage microcapsule

A polyurethane modification and phase-change energy storage technology, applied in the field of phase-change energy storage, can solve the problems of inability to form powder with uniform particle size, injury to operators and users, and insufficient toughness of shell materials, and achieve environmental protection and non-toxic production costs. Low requirements for production equipment and the effect of improving flame retardant performance

Active Publication Date: 2020-04-24
SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inorganic material calcium carbonate is used as the shell material. The phase-change energy storage microcapsules have poor shell toughness and are easy to break during processing, and calcium carbonate is not acid-resistant and easy to degrade in an acid environment. Agglomeration phenomenon, unable to form powder with uniform particle size when dry
[0005] For example, the phase-change energy storage microcapsule reported in the patent publication number CN1098

Method used

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  • Phase change energy storage microcapsule taking polyurethane modified organic silicon resin as shell material and preparation method of phase change energy storage microcapsule
  • Phase change energy storage microcapsule taking polyurethane modified organic silicon resin as shell material and preparation method of phase change energy storage microcapsule
  • Phase change energy storage microcapsule taking polyurethane modified organic silicon resin as shell material and preparation method of phase change energy storage microcapsule

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Example 1 Preparation of phase change energy storage microcapsules with polyurethane modified silicone resin as shell material

[0060] (1) The preparation of polysiloxane prepolymer, the reaction monomer tetramethyl divinyl disiloxane and polymethyl hydrogen siloxane are mixed homogeneously, add the catalyst platinum (0.025% of monomer quality) )-divinyltetramethyldisiloxane complex, prepolymerized in a water bath at a temperature of 60° C. for 45 minutes to prepare 20 grams of polysiloxane prepolymer.

[0061] (2) Preparation of the shell material prepolymer, adding 1 gram of the polyurethane prepolymer into (1), stirring at a constant temperature of 60° C. for 15 minutes to obtain a polyurethane modified silicone resin prepolymer.

[0062] (3) Weigh the core material ethyl laurate with a mass fraction of 4:1 and mix them evenly with the shell material prepolymer for later use.

[0063] (4) Weigh 200 mL of an aqueous solution containing 2% SDS as a surfactant.

[00...

Embodiment 2

[0066] Example 2 Preparation of Phase Change Energy Storage Microcapsules Using Polyurethane Modified Silicone Resin as Shell Material

[0067] (1) The preparation of polysiloxane prepolymer, the reaction monomer tetramethyl divinyl disiloxane and polymethyl hydrogen siloxane are mixed uniformly, add the catalyst platinum (0.03% of monomer mass) )-divinyltetramethyldisiloxane complex, which was prepolymerized in a water bath at a temperature of 55° C. for 40 minutes to prepare 16 grams of polysiloxane prepolymer.

[0068] (2) Preparation of the shell material prepolymer, adding 0.8 g of the polyurethane prepolymer into (1) and stirring evenly, stirring at a constant temperature of 60° C. for 15 minutes to obtain a polyurethane modified silicone resin prepolymer.

[0069] (3) Weigh the core material methyl behenate with a mass fraction of 4.5:1 and mix them evenly with the shell material prepolymer for later use.

[0070] (4) Weigh 200 mL of an aqueous solution containing 2% S...

Embodiment 3

[0073] Example 3 Preparation of Phase Change Energy Storage Microcapsules Using Polyurethane Modified Silicone Resin as Shell Material

[0074] (1) For the preparation of polysiloxane prepolymer, the reaction monomer tetramethyldivinyl disiloxane and polymethylhydrogensiloxane are mixed evenly in a certain proportion, and 0.05% of the monomer mass is added Dibutyltin dilaurate was prepolymerized in a water bath at a temperature of 70° C. for 35 minutes to prepare 30 grams of polysiloxane prepolymer.

[0075] (2) Preparation of the shell material prepolymer, adding 2 grams of polyurethane prepolymer into (1), stirring and mixing, and stirring at a constant temperature of 60° C. for 15 minutes to obtain a polyurethane modified silicone resin prepolymer.

[0076] (3) Weigh the core material n-octadecane with a mass fraction of 5:1 and mix them evenly with the shell material prepolymer for later use.

[0077] (4) Weigh 200 mL of an aqueous solution containing 7% PVA as a surfacta...

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Abstract

The invention relates to a phase change energy storage microcapsule taking polyurethane modified organic silicon resin as a shell material and a preparation method of the phase change energy storage microcapsule, and particularly discloses the preparation method which comprises the following steps: (1) uniformly mixing monomers for generating organic silicon resin, adding a catalyst, and prepolymerizing to obtain a prepolymer of polysiloxane; (2) adding the polyurethane prepolymer into the step (1), and carrying out a reaction to obtain a polyurethane modified organic silicon resin prepolymer;(3) uniformly mixing a core material with the shell material prepolymer to obtain a core material and shell material prepolymer mixture; (4) preparing an aqueous solution of a surfactant; and (5) mixing and emulsifying the core material and shell material prepolymer mixture and the aqueous solution of the surfactant to obtain an emulsion, adding a catalyst until the reaction is finished, separating, and drying to obtain the polyurethane modified organic silicon resin shell phase change energy storage microcapsule. The method is green, pollution-free and simple to operate, and the obtained microcapsule is smooth in surface, good in compactness, adjustable in phase change temperature, controllable in particle size, good in heat resistance and high in phase change enthalpy value.

Description

technical field [0001] The invention belongs to the technical field of phase change energy storage, and in particular relates to a phase change energy storage microcapsule with a polyurethane modified silicone resin as a shell material and a preparation method thereof. Background technique [0002] Phase change energy storage technology is the application of microcapsule technology to coat a layer of stable film on the surface of solid-liquid phase change energy storage material particles to form a composite phase change energy storage material with a "core-shell" structure. Phase change energy storage materials will have problems of leakage, volume change and easy corrosion during application, so it is necessary to microencapsulate phase change energy storage materials. [0003] The shell materials of phase change energy storage microcapsules can usually be divided into organic shell materials and inorganic shell materials. It is coated with variable energy storage materia...

Claims

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Application Information

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IPC IPC(8): B01J13/02B01J13/14C09K5/06
CPCB01J13/02B01J13/14C09K5/063
Inventor 喻学锋刘海生李金堆
Owner SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS
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