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High refractive index inorganic oxide microsphere-organic polymer double shell phase change energy storage microcapsule and preparation method thereof

A technology of inorganic oxides and organic polymers, which is applied in the preparation of microspheres, microcapsule preparations, chemical instruments and methods, etc., to achieve the effects of improving mechanical properties, improving heat insulation and temperature control performance, and making the preparation process environmentally friendly.

Inactive Publication Date: 2016-12-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, only titanium dioxide has been used as a shell material in this type of inorganic oxides to prepare phase change microcapsules, but there are few reports on using crystalline TiO2 as a wall material and using titanium dioxide and organic materials as a wall material. See

Method used

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  • High refractive index inorganic oxide microsphere-organic polymer double shell phase change energy storage microcapsule and preparation method thereof
  • High refractive index inorganic oxide microsphere-organic polymer double shell phase change energy storage microcapsule and preparation method thereof
  • High refractive index inorganic oxide microsphere-organic polymer double shell phase change energy storage microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Mix 50 ml of ethanol and water evenly, and adjust the pH value to 9 with ammonia water to obtain an ethanol-water mixture; weigh 20 g of titanium dioxide microsphere powder and add it to the ethanol-water mixture, heat up to 80 ° C after ultrasonic dispersion, Insulated for 20 minutes to obtain a titanium dioxide dispersion. Take 2.5 ml of the modifier methacryloxypropyl tris(trimethylsiloxane) silane and add it to 18 mL of ethanol, mix well to obtain a modifier solution; add the modifier solution dropwise into the titanium dioxide dispersion, and then 80 DEG C continue to react for 2 hours. After the temperature drops to room temperature, the titanium dioxide powder is separated by a centrifuge, washed with ethanol, and dried to obtain titanium dioxide microsphere powder with double bonds on the surface.

[0041] 2.3 g surface-modified titanium dioxide microsphere powder (average particle size: 200 nm) was ultrasonically dispersed in 50 mL water to obtain an aqueous ph...

Embodiment 2

[0043] The surface modification of titanium dioxide microsphere powder refers to the method in Example 1, but vinyltriethoxysilane is used as a modifier, and the concentration of the modifier solution is 5 vol%, and the rest of the conditions are the same as in Example 1.

[0044] 3.0 g of titanium dioxide microsphere powder (average particle size: 300 nm) modified by vinyltriethoxysilane on the surface was ultrasonically dispersed in 20 mL of water to obtain the water phase; 4.5 g of phase-change paraffin (melting point 30°C), 1g of methyl methacrylate and 2.0g of methacrylic acid, 0.2g of azobisisoheptanonitrile and 0.01g of butanediol dimethacrylate were stirred and mixed uniformly at room temperature to obtain an oil phase; the water phase was mixed with the oil phase , using a high-speed homogenizer to stir at a high speed of 19000rpm for 3 minutes to obtain an oil-in-water emulsion; transfer the emulsion to a two-necked bottle, pass nitrogen gas to remove oxygen, then rai...

Embodiment 3

[0046] The surface modification of titanium dioxide microsphere powder refers to the method of Example 1, but adopts propenyl (chloromethyl) dimethylsilane as a modifier, and the concentration of the modifier solution is 10 vol%, and the remaining conditions are the same as in Example 1.

[0047] 2.5 g of titanium dioxide microsphere powder (average particle size: 600 nm) modified by propenyl (chloromethyl) dimethylsilane on the surface was ultrasonically dispersed in 10 mL of water to obtain an aqueous phase; 5 g of phase-change paraffin (melting point: 20 °C), 2g methyl methacrylate (MMA), 1g styrene, 0.35g benzoyl peroxide and 0.1g ethylene glycol dimethacrylate are stirred and mixed at room temperature to obtain an oil phase; Mix with the oil phase, and use a high-speed homogenizer to stir at a high speed of 10,000 rpm for 3 minutes to obtain an oil-in-water emulsion; transfer the emulsion to a two-necked bottle, pass nitrogen gas to remove oxygen, and then raise the temper...

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Abstract

The invention discloses a high refractive index inorganic oxide microsphere-organic polymer double shell phase change energy storage microcapsule and a preparation method thereof, the phase change energy storage microcapsule comprises a phase change core material and an organic-inorganic composite double-layer wall material wrapping the core material; wherein the phase change core material is phase change paraffin with the melting point of 10-60 DEG C; and the organic-inorganic composite double-layer wall material comprises a polymer and a high refractive index inorganic oxide microsphere. The preparation method of the phase change energy storage microcapsule comprises the following steps: configuration of paraffin-polymer monomers and an initiator oil phase; configuration of an inorganic oxide microsphere suspension aqueous phase; mixing of the oil phase and the aqueous phase, and high speed dispersing to obtain pickering emulsion; heating for triggering monomer polymerization; microcapsule postprocessing; and the like. The phase change energy storage microcapsule has the advantages of good phase change energy storage effect, good heat reflection effect and high mechanical property. The preparation method is simple and effective, and the process is easy to control.

Description

technical field [0001] The invention belongs to the technical field of phase change energy storage materials, in particular to a phase change energy storage microcapsule with a high refractive index inorganic oxide microsphere-organic polymer double-shell layer and a preparation method thereof. Background technique [0002] It is a worldwide issue to develop low-carbon, environmentally friendly green energy, reduce energy consumption, and improve energy utilization. Heat insulation technology achieves the purpose of heat insulation by reducing the absorption of sunlight, reducing heat transfer, and reducing energy intrusion. It has become a research hotspot in the field of energy conservation. The use of phase change materials to absorb and release a large amount of heat during the phase change process with temperature changes can achieve the purpose of temperature control and energy saving. In order to overcome the problems of phase change material leakage, corrosion, and ...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/14B01J13/02
CPCC09K5/063B01J13/02B01J13/14
Inventor 符小艺何新华徐雪青邱晓忠
Owner SOUTH CHINA UNIV OF TECH
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