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

AI Technical Summary

Problems solved by technology

Patent 201910158566X uses a single organic shell, which has disadvantages such as poor thermal conductivity, easy shrinkage of the shell, and single functionality

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
Comparison scheme
Effect test

Embodiment 1

[0049] In a 500mL single-necked flask, take 200mL of 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 30min, ultrasonic at 60% amplitude for 20min, insert The circulating water was condensed, and finally the flask was transferred to an oil bath at 80°C to react for 5 hours. Subsequently, the mixture was centrifuged in a centrifuge at 5000rpm for 2h, the supernatant was poured out, washed three times with absolute ethanol, and finally the solid product was dried in a vacuum oven at 65°C for 12h to obtain KH-570 modified TiO 2 .

[0050] 2g modified nano-TiO 2 Mix with 150g of deionized water, and shear at a high speed of 8000rpm for 20min with a high-speed disperser. Then it was added to an ultrasonic cell disruptor and ultrasonicated at 60% amplitude for 30 minutes to obtain a water p...

Embodiment 2

[0059] In a 500mL single-necked flask, measure 150mL of deionized water and weigh 1.5g of nano-TiO 2 and 1.5mL KH-570 and dispersed in it, added concentrated HCl to adjust the pH to 4-5, stirred the above mixture with a constant temperature magnetic stirrer for 30min, ultrasonicated at 60% amplitude for 30min, connected to condensing circulating water, and finally transferred the flask to React in an oil bath at 80°C for 6h. Subsequently, the mixture was centrifuged in a centrifuge at 5000rpm for 2h, the supernatant was poured out, washed three times with absolute ethanol, and finally the solid product was dried in a vacuum oven at 65°C for 12h to obtain KH-570 modified TiO 2 .

[0060] 1.5g modified nano-TiO 2 Mix with 200g of deionized water, and shear at a high speed of 6000rpm for 20min with a high-speed disperser. Then it was added to an ultrasonic cell disruptor, and the amplitude of 60% was ultrasonicated for 30 minutes to obtain an aqueous phase; 4 g of DVB, 5 g of ...

Embodiment 3

[0063] In a 250mL single-necked flask, measure 100mL of deionized water and weigh 0.5g of nano-TiO 2 and 0.5mL KH-570 and dispersed in it, added concentrated HCl to adjust the pH to 4-5, stirred the above mixture with a constant temperature magnetic stirrer for 30min, ultrasonicated at 60% amplitude for 30min, connected to condensing circulating water, and finally transferred the flask to React in an oil bath at 80°C for 8h. Subsequently, the mixture was centrifuged in a centrifuge at 5000rpm for 2h, the supernatant was poured out, washed three times with absolute ethanol, and finally the solid product was dried in a vacuum oven at 65°C for 12h to obtain KH-570 modified TiO 2 .

[0064] 0.5g modified nano-TiO 2 Mix with 250g of deionized water, and shear at a high speed of 4000rpm for 20min with a high-speed disperser. Then it was added to an ultrasonic cell breaker, and the amplitude of 60% was sonicated for 30 minutes to obtain an aqueous phase; 4.5 g DVB, 5 g paraffin an...

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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
CPCC09K5/063B01J31/38B01J37/32B01D53/8668C08F292/00C08F2/30B01D2258/06B01D2255/802B01J35/40B01J35/39C08F212/36
Inventor 张旭孙文昌王小梅
Owner HEBEI UNIV OF TECH
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