Microcapsules of organic phase change energy storage materials and preparation method thereof

A phase change energy storage material and a technology for energy storage materials, which are applied in the field of microcapsules of organic phase change energy storage materials and their preparation, and can solve the problems of microcapsule destruction and the like

Active Publication Date: 2011-12-21
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microcapsules of phase-change energy storage materials made of gelatin and gum arabic through complex coacervation, because the raw material of gum arabic is relatively expensive and easily hydrolyzed and degraded, the microcapsules are destroyed

Method used

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  • Microcapsules of organic phase change energy storage materials and preparation method thereof
  • Microcapsules of organic phase change energy storage materials and preparation method thereof
  • Microcapsules of organic phase change energy storage materials and preparation method thereof

Examples

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Comparison scheme
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preparation example Construction

[0124] 4. Combining complex coagulation method with in-situ polymerization method, complex coacervation method and sol-gel method to prepare microcapsules of organic phase change energy storage materials with double-layer composite functional shells, including:

[0125] First, the method of complex coacervation is adopted, and the electrostatic interaction between two or more water-soluble polymer molecules with opposite charges is used, and the formed condensate undergoes phase separation in the water phase and deposits at the interface. After joint curing, the first polymer shell layer is formed, and the organic phase change energy storage material microcapsules of the first polymer shell layer are prepared. At the same time, organic phase change energy storage materials can be pre-dispersed into certain functional particles to prepare microcapsules with functional particles such as infrared reflection and absorption, ultraviolet reflection and absorption, thermal radiation r...

Embodiment 1

[0165] Example 1. Preparation of phase-change energy storage material microcapsules inlaid with hollow spheres by organic / organic composite shell encapsulating 30# phase-change wax by in-situ polymerization

[0166] Preparation of urea-formaldehyde prepolymer aqueous solution: Add 240g of urea and 488.5g of 37% formaldehyde aqueous solution into a three-necked flask equipped with a reflux condenser, mechanically stir to dissolve, add triethanolamine to adjust the pH of the system to 8, heat to 70°C, Insulate and react for 1 hour to obtain a viscous liquid, then add 1000 g of water to dilute to obtain a stable aqueous solution of urea-formaldehyde prepolymer.

[0167] Preparation of the sodium salt hydrolyzate solution of styrene-maleic anhydride copolymer: add a certain amount of toluene to a three-necked flask equipped with a condenser, a thermometer and an agitator, pass nitrogen to remove oxygen, and add 10% mole of toluene mass Styrene and maleic anhydride with a ratio of ...

Embodiment 2

[0171] Example 2. Preparation of microcapsules of paraffin wax phase-change energy storage materials with high-efficiency tissue slices with a melting point of 50-52°C in an organic / organic composite shell embedded with hollow spheres prepared by in-situ polymerization

[0172] Get the sodium salt hydrolyzate solution of 10g 10% styrene-maleic anhydride copolymer among the embodiment 1, join in 100g water, adjust its pH value 5~6 with 1M hydrochloric acid, add 50g fusing point 50~52 ℃ high-efficiency Paraffin the tissue sections, keep the system at 75°C, use a high-speed shear emulsifier to emulsify at 10,000rpm for 10min, transfer the obtained emulsion to a three-necked flask in a water bath at 75°C, and stir mechanically.

[0173] Take 100 g of the urea-formaldehyde prepolymer aqueous solution in Example 1, add 2.5 g of sodium chloride to dissolve it, adjust the pH value of the solution to 5-6 with 1M hydrochloric acid, slowly drop it into a three-necked bottle of paraffin wa...

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Abstract

The invention discloses a microcapsule of an organic phase change energy storage material and a preparation method thereof. The microcapsule of the organic phase-change energy storage material is composed of a core and a core-shell, the core material includes an organic phase-change energy storage material; the core-shell includes at least an inner layer and an outer layer, and the inner layer adopts an in-situ Polymerization method, interfacial polymerization method, reactive phase separation method, complex coacervation method and sol-gel method for coating; the outer layer adopts in-situ polymerization method, reactive phase separation method, sol-gel method Any one of the four methods of method and complex coacervation method is used for coating. The size, core-shell composition and shell thickness of the microcapsules of the present invention are adjustable, have good flexibility, mechanical strength, permeability resistance and dispersibility, and can be widely used in solar energy utilization, industrial waste heat recovery, building energy saving, constant temperature clothing , cold storage heat storage air conditioners and constant temperature electrical devices and other energy, materials, aerospace, textiles, electric power, medical equipment, construction and other fields.

Description

technical field [0001] The invention relates to a microcapsule of an organic phase change energy storage material and a preparation method thereof. Background technique [0002] With the increasing demand for energy, the shortage and scarcity of energy resources have become particularly prominent. Therefore, energy saving, energy saving and efficient use of other renewable energy have become important contents in the energy field. Using phase change latent heat of phase change materials to store energy (cold storage, heat storage) is a new type of environmental protection and energy saving technology. [0003] Phase change materials (PCMs) refer to a kind of intelligent material that can absorb or release heat when a substance changes phase, but the temperature of the substance itself does not change or changes little. The normal and low temperature phase change material or the phase change material compounded with the material has the function of adaptive environmental tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06B01J13/14B01J13/10
CPCY02E70/30
Inventor 杨振忠金兆国刘继广屈小中
Owner BEIJING NEW BUILDING MATERIALS PLC
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