Microcapsule phase change energy storage material with photoluminescence characteristic and preparation method thereof

A phase-change energy storage material and photoluminescence technology, which is applied in the direction of luminescent materials, microcapsule preparations, microsphere preparation, etc., to achieve high thermal conductivity, easy control of the reaction process, and good light transmission

Active Publication Date: 2014-08-13
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN101555401A reports the preparation of microcapsule phase change energy storage materials with specific functions by using various inorganic precursors, especially mentioning zirconium oxychloride etc. Microcapsule phase-change energy storage materials for wall materials, but the synthesis me

Method used

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  • Microcapsule phase change energy storage material with photoluminescence characteristic and preparation method thereof
  • Microcapsule phase change energy storage material with photoluminescence characteristic and preparation method thereof
  • Microcapsule phase change energy storage material with photoluminescence characteristic and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] At 45°C and 450rpm stirring speed, add 20g n-eicosane and 2g emulsifier PEO–PPO–PEO into 400mL formamide solution and stir for 2-3 hours to obtain a stable O / W emulsion; add 20g zirconium Precursor zirconium n-propoxide, react for 1 to 2 hours to disperse zirconium n-propoxide evenly; add 200mL deionized water and formamide mixed solution (volume ratio 1:1) as initiator, add 5g crystallization accelerator NaF, and heat up to 70°C, react for 10-16 hours; stop stirring, keep warm for 8 hours; cool, wash 2-3 times with petroleum ether, filter and separate the emulsion, wash 2-3 times with deionized water and absolute ethanol, and dry to obtain crystalline light Luminescent zirconia microcapsule phase change energy storage material.

[0034] The obtained tetragonal crystal form (such as Figure 4 ) zirconia-coated microcapsule phase-change energy storage material, its surface is smooth (such as figure 1 ), with a regular "core-shell" structure (such as figure 2 , imag...

Embodiment 2

[0036] Add 30g n-nonadecane and 2g emulsifier Span60 into 400mL formamide solution at 45°C and 500rpm stirring speed, and after stirring for 2-3 hours, a stable O / W emulsion is obtained; add 20g zirconium precursor n-butyl Zirconium alkoxide, react for 1-2 hours, so that zirconium n-butoxide is uniformly dispersed; add 200mL deionized water and formamide mixed solution (volume ratio 1:1) as an initiator, add 3mL crystallization accelerator H 3 PO 4 , and heated to 70°C, reacted for 10-16 hours; stopped stirring, kept warm for 8 hours; cooled, first washed 2-3 times with petroleum ether, filtered to separate the emulsion, washed 2-3 times with deionized water and absolute ethanol, and dried to obtain Crystalline photoluminescence zirconia microcapsule phase change energy storage material.

[0037] The obtained tetragonal zirconia-coated microcapsule phase-change energy storage material has a smooth surface and a regular "core-shell" structure. The particle size of the microcap...

Embodiment 3

[0039] At 45°C and 450rpm stirring speed, 20g of n-octadecane and 2g of emulsifier Span80 were added to 400mL of ethanol / acetylacetone mixed solution (volume ratio 1:1), and after stirring for 2 to 3 hours, a stable O / W emulsion; add 30g of zirconium precursor zirconium tert-butoxide, 2g of yttrium nitrate hexahydrate, react for 1-2h, so that zirconium tert-butoxide and yttrium nitrate hexahydrate are dispersed evenly; add 300mL deionized water and formamide mixed solution (volume Ratio 1:1) as initiator, add 4.4g crystallization accelerator NH 4 F, and heat up to 70°C, react for 10-16 hours; stop stirring, keep warm for 8 hours; cool, wash with petroleum ether for 2-3 times, filter and separate the emulsion, wash with deionized water and absolute ethanol for 2-3 times, and dry A crystalline photoluminescent zirconia microcapsule phase-change energy storage material doped with yttrium element is obtained.

[0040] The obtained yttrium-doped tetragonal zirconia-coated microca...

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Abstract

The invention discloses a microcapsule phase change energy storage material with a photoluminescence characteristic and a preparation method thereof. A wall material of a microcapsule is prepared from crystal-state zirconium oxide or element-doped crystal-state zirconium oxide, and a core material of the microcapsule is prepared from paraffin and organic phase change energy storage materials such higher aliphatic alcohol, acids and esters, wherein the mass percentages of the wall material and the core material can be respectively adjusted in the range of 30-70wt.% and 30-70wt.% as required, the average particle diameter of the microcapsule is 0.5-3 micrometers, and the wall thickness of the microcapsule is 0.15-0.3 micrometers. The microcapsule phase change energy storage material is capable of intensely absorbing ultraviolet light and near-infrared light at ultraviolet and near-infrared wavebands, emitting visible light with the wavelengths of about 500nm when being excited by light with the wavelengths of 296nm and 377nm, and generating visible light with the wavelengths of 600-700nm when being excited by near-infrared light with the wavelengths of 980nm, and meanwhile has the photoluminescence characteristic.

Description

technical field [0001] The invention belongs to the field of phase-change energy storage materials, and relates to a novel microcapsule phase-change energy storage material with photoluminescent properties and a preparation method thereof. Background technique [0002] Using the phase change process of substances, that is, substances that absorb or release a large amount of latent heat through the phase change process and make their temperature change little, are widely used in heat storage and temperature control, which are phase change energy storage materials. Phase change energy storage materials can be divided into inorganic salt phase change materials, organic phase change materials and polymer phase change materials according to the properties of substances. Organic phase change energy storage materials mainly include paraffin wax and higher fatty acids, alcohols, esters, etc. The biggest problem with organic phase change materials is that each process of absorbing a...

Claims

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Application Information

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IPC IPC(8): C09K5/06C09K11/02C09K11/67C09K11/78B01J13/02
Inventor 汪晓东张莹武德珍
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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