Organic-inorganic hybrid shell bifunctional phase change capsule and preparation method thereof

A phase-change capsule and dual-function technology, applied in chemical instruments and methods, catalyst activation/preparation, separation methods, etc., can solve the problems of single, easy-to-shrink functionality of the shell, poor thermal conductivity, etc., to increase heat transfer efficiency , taking into account product performance and environmental friendliness, the effect of not easy to fall off

Active Publication Date: 2020-05-29
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent 201910158566X uses a single organic shell, which has disadvantages such as

Method used

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  • Organic-inorganic hybrid shell bifunctional phase change capsule and preparation method thereof
  • Organic-inorganic hybrid shell bifunctional phase change capsule and preparation method thereof
  • Organic-inorganic hybrid shell bifunctional phase change capsule and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0048] Example 1

[0049] In a 500mL single-neck flask, measure out 200mL deionized water and weigh 2g of nano-TiO 2 (Particle size 25 nanometers) and 2mL KH-570, and disperse them, add concentrated HCl (reagent grade) to adjust the pH to 4-5, stir the above mixture with a constant temperature magnetic stirrer for 30 minutes, and sonicate the mixture at 60% amplitude for 20 minutes. The circulating water is condensed, and finally the flask is transferred to an oil bath at 80°C for 5 hours. Subsequently, the mixed solution was centrifuged in a centrifuge at 5000 rpm for 2 hours, the supernatant was poured out, washed with absolute ethanol three times, and the solid product was dried in a vacuum oven at 65°C for 12 hours to obtain KH-570 modified TiO 2 .

[0050] 2g modified nano TiO 2 Mix with 150g deionized water, and use a high-speed disperser to shear at a high speed of 8000rpm for 20min. Then add it to the ultrasonic cell crusher and sonicate it with 60% amplitude for 30 minute...

Example Embodiment

[0058] Example 2

[0059] In a 500mL single-neck flask, measure out 150mL deionized water and weigh 1.5g of nano-TiO 2 Disperse it with 1.5mL KH-570, add concentrated HCl to adjust the pH to 4-5, stir the above mixture with a thermostatic magnetic stirrer for 30 minutes, sonicate the mixture at 60% amplitude for 30 minutes, connect to the condensed circulating water, and finally transfer the flask React 6h in an oil bath at 80°C. Subsequently, the mixed solution was centrifuged in a centrifuge at 5000 rpm for 2 hours, the supernatant was poured out, washed with absolute ethanol three times, and the solid product was dried in a vacuum oven at 65°C for 12 hours to obtain KH-570 modified TiO 2 .

[0060] 1.5g modified nano TiO 2 Mix with 200g deionized water, and shear at a high speed of 6000rpm for 20min with a high-speed disperser. Then add it to the ultrasonic cell crusher, sonicate at 60% amplitude for 30min to obtain the water phase; mix 4g DVB, 5g paraffin wax and 0.25g AIBN, s...

Example Embodiment

[0062] Example 3.

[0063] In a 250mL single-neck flask, measure out 100mL deionized water and weigh 0.5g of nano-TiO 2 Disperse with 0.5mL KH-570, add concentrated HCl to adjust the pH to 4-5, stir the above mixture with a thermostatic magnetic stirrer for 30 minutes, sonicate the mixture at 60% amplitude for 30 minutes, connect to the condensed circulating water, and finally transfer the flask React 8h in an oil bath at 80°C. Subsequently, the mixed solution was centrifuged in a centrifuge at 5000 rpm for 2 hours, the supernatant was poured out, washed with absolute ethanol three times, and the solid product was dried in a vacuum oven at 65°C for 12 hours to obtain KH-570 modified TiO 2 .

[0064] 0.5g modified nano TiO 2 Mix with 250g deionized water, and use a high-speed disperser to shear at a high speed of 4000rpm for 20min. Then add it to the ultrasonic cell crusher, sonicate at 60% amplitude for 30 minutes to obtain the water phase; mix 4.5g DVB, 5g paraffin wax and 0.25g ...

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Abstract

The invention relates to an organic-inorganic hybrid shell bifunctional phase change capsule and a preparation method thereof. The material comprises a main body material, a monomer, an initiator andan emulsifier, wherein the mass percentage content of each component is as follows: 25%-75% of the main body material, 30%-50% of the monomer, 0.5%-3% of the initiator and 2%-20% of the emulsifier; the main body material is industrial organic paraffin with a melting point of 5-58 DEG C; and in the preparation process, the polydivinylbenzene/TiO2 hybrid shell bifunctional phase change capsule withadjustable micron-scale to nano-scale particle sizes is prepared through Pickering emulsion polymerization. According to the preparation method, the organic-inorganic mixed phase is pretreated throughhigh-speed dispersion under the condition that a co-emulsifier is not added, so that the organic-inorganic hybrid shell bifunctional phase change capsule has a smaller micro-nano size, and the prepared capsule has better heat-conducting property and mechanical property; the heat transfer rate is improved; and moreover, the excellent formaldehyde light degradation performance is also realized.

Description

technical field [0001] The invention relates to the field of nanomaterials for energy storage and photodegradation of organic pollutants, in particular to an organic-inorganic hybrid shell bifunctional phase-change capsule and a preparation method thereof. Background technique [0002] In recent years, the world's energy demand is mainly met by fossil fuels, which makes fossil fuels continue to be consumed and environmental issues become more and more urgent. Especially in recent years, my country's building energy consumption accounts for 20% of the annual energy production, which makes the use of renewable energy more and more attention. However, renewable energy sources like solar energy are intermittent in nature and require storage systems for energy storage. The use of phase change heat storage system in the building envelope for energy storage is one of the effective ways to reduce building energy consumption and improve the comfort of the living room, and it has att...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J31/38B01J37/32B01D53/86B01D53/72C08F292/00C08F212/36C08F2/30
CPCB01D53/8668B01D2255/802B01D2258/06B01J31/38B01J35/004B01J35/023B01J37/32C08F2/30C08F292/00C09K5/063C08F212/36
Inventor 张旭孙文昌王小梅
Owner HEBEI UNIV OF TECH
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