A kind of phase change energy storage microcapsule with polyurethane modified silicone resin as shell material and preparation method thereof

A technology of polyurethane modification and phase change energy storage, 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, insufficient toughness of shell materials, etc., and achieve environmental protection, non-toxic production cost, Low production equipment requirements and improved flame retardant properties

Active Publication Date: 2021-03-12
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 CN109868116A uses melamine-formaldehyde resin as the shell material. It can be seen from the SEM image that the microcapsules have a large number of broken shells, indicating that the toughness of the shell material is not enough. At the same time, the phase change energy storage microcapsules of the shell material have carcinogen formaldehyde in the production and use process, which is easy to cause environmental pollution and cause physical harm to operators and users.

Method used

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  • A kind of phase change energy storage microcapsule with polyurethane modified silicone resin as shell material and preparation method thereof
  • A kind of phase change energy storage microcapsule with polyurethane modified silicone resin as shell material and preparation method thereof
  • A kind of phase change energy storage microcapsule with polyurethane modified silicone resin as shell material and preparation method thereof

Examples

Experimental program
Comparison scheme
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 with a polyurethane modified silicone resin as the shell material and a preparation method thereof, specifically disclosing that the preparation method includes the following steps: (1) uniformly mixing the monomers for forming the silicone resin, adding The catalyst is prepolymerized to obtain a polysiloxane prepolymer; (2) the urethane polyprepolymer is added to (1) to react to obtain a polyurethane modified silicone resin prepolymer; (3) the core material and the shell (4) preparing an aqueous solution of surfactant; (5) mixing the core material and shell material prepolymer mixture and the aqueous solution of surfactant and Emulsify to obtain an emulsion, add a catalyst until the reaction is complete, separate and dry to obtain polyurethane-modified silicone resin shell phase-change energy storage microcapsules. The method is green and pollution-free, and the operation is simple. The obtained microcapsules have smooth surface, good compactness, adjustable phase transition temperature, controllable particle size, good heat resistance and high phase transition enthalpy.

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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Patent Type & Authority Patents(China)
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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