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High-efficiency phase change energy storage microcapsule with thermochromic function, and preparation method thereof

A phase-change energy storage, thermochromic technology, applied in microcapsule preparation, microsphere preparation, color-changing fluorescent materials, etc., can solve the problems of poor heat storage capacity, limited content, no heat storage performance, etc. Value, easy control, high yield of microcapsules

Active Publication Date: 2016-06-15
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The substance in the core material undergoes a structural change through electron gain and loss, resulting in a color change, and the solvent that determines the color change temperature undergoes a phase change, which has heat storage properties. However, due to the limited content of the solvent in the core material, its heat storage capacity is poor. , the enthalpy value is only about 40J / g
It can be seen that such microcapsules can change color but do not have efficient heat storage performance

Method used

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  • High-efficiency phase change energy storage microcapsule with thermochromic function, and preparation method thereof
  • High-efficiency phase change energy storage microcapsule with thermochromic function, and preparation method thereof
  • High-efficiency phase change energy storage microcapsule with thermochromic function, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]1) Weigh 2g of rose red thermochromic powder with a discoloration temperature of 20°C and add it to 100ml of alcohol-water (volume ratio 9:1) solution, ultrasonically disperse for 10min, then adjust the pH value to 5.5 with acetic acid, and stir magnetically for 40min. Raise the temperature to 50°C, slowly add 5g of γ-methacryloxypropyltrimethoxysilane (KH570) dropwise, react for 1.5h under stirring at 700rpm, finally filter, wash and dry to obtain surface-modified thermochromic powder .

[0035] 2) Heat 8g of n-octadecane to melt, then add 0.3g of the modified thermochromic powder obtained in step 1) and 7g of methyl methacrylate, stir and mix, and ultrasonically disperse for 15 minutes to form an oil phase.

[0036] 3) Stir and mix 100g of deionized water and 7g of styrene-maleic anhydride copolymer to form a water phase.

[0037] 4) Add the oil phase formed in step 2) to the water phase formed in step 3) at 40°C,

[0038] Emulsify for 15 minutes under stirring at 10...

Embodiment 2

[0043] 1) Weigh 1g of rose red thermochromic powder with a color change temperature of 30°C and add it to 100ml of alcohol-water (volume ratio 7:1) solution, ultrasonically disperse for 15min, then adjust the pH value to 7 with acetic acid, and stir magnetically for 30min. Raise the temperature to 40°C, slowly add 3g of γ-(2,3-glycidoxy)propyltrimethoxysilane (KH560) dropwise, react for 1h under stirring at 800rpm, finally filter, wash and dry to obtain surface modification Thermochromic powder.

[0044] 2) Heat 10g of n-octadecane to melt, then add 0.5g of the modified thermochromic powder obtained in step 1) and 8g of methyl methacrylate, stir and mix, and ultrasonically disperse for 10 minutes to form an oil phase.

[0045] 3) Stir and mix 100 g of deionized water, 3 g of styrene-maleic anhydride copolymer, and 2.5 g of sodium dodecylbenzene sulfate to form a water phase.

[0046] 4) Add the oil phase formed in step 2) to the water phase formed in step 3) at 40°C, and emul...

Embodiment 3

[0050] 1) Weigh 1g of blue thermochromic powder with a discoloration temperature of 30°C and add it to 100ml of alcohol-water (volume ratio 9:1) solution, ultrasonically disperse for 10min, then adjust the pH value to 7 with acetic acid, and stir magnetically for 30min. Increase the temperature to 60°C, slowly add 3g of isopropoxy distearate acyloxyaluminate (DL-411-A), react for 1h under stirring at 600rpm, finally filter, wash and dry to obtain surface modification Thermochromic powder.

[0051] 2) Heat 8g of n-butyl stearate to melt, then add 1g of the modified thermochromic powder obtained in step 1) and 10g of methyl methacrylate, stir and mix, and ultrasonically disperse for 10 minutes to form an oil phase.

[0052] 3) Stir and mix 100g of deionized water and 7g of styrene-maleic anhydride copolymer to form a water phase.

[0053] 4) Add the oil phase formed in step 2) to the water phase formed in step 3) at 40°C, and emulsify for 15 minutes under stirring at 1000 rpm. ...

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Abstract

The invention relates to a high-efficiency phase change energy storage microcapsule with a thermochromic function, and a preparation method thereof. The core of the microcapsule is a high-grade aliphatic hydrocarbon, alcohol, acid or lipid organic phase change material, and the wall of the microcapsule is a polymer formed by surface modified thermochromic powder and an organic polymer monomer. The preparation method of the microcapsule comprises the following steps: carrying out surface modifying treatment on the thermochromic powder with a coupling agent; mixing the surface modified thermochromic powder, the organic phase change material and the organic polymer monomer as an oil phase, and adopting an aqueous solution of a surfactant as a water phase; and adding the oil phase to the aqueous phase, and carrying out high speed emulsification and polymerization to form the high-efficiency phase change energy storage microcapsule with a thermochromic function. The preparation method has the advantages of simple preparation process, and easy control of the reaction process; and the material has the advantages of wide thermochromic temperature range, abundant color, high heat storage ability and long recycling life, and is hopeful to be applied in the fields of chromogenic indication, coatings and building materials.

Description

technical field [0001] The invention belongs to the field of phase change energy storage materials, and in particular relates to a novel high-efficiency phase change energy storage microcapsule with thermochromic function and a preparation method thereof. Background technique [0002] Energy and environmental issues are two major problems facing mankind today. In order to solve the contradiction between energy supply and demand and improve energy utilization, phase change energy storage materials with high-quality energy storage density and renewable have attracted increasing attention. A phase change energy storage material is a functional material that can store or release a large amount of latent heat by undergoing a physical state change (solid-liquid, solid-solid or gas-liquid) at a certain temperature. However, when the phase change energy storage material is in phase change, the liquid is easy to flow, and it is easy to leak and lose, so it needs to be packaged. At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02C09K5/06B01J13/14
CPCB01J13/14C09K5/063C09K9/02
Inventor 宋国林王浩唐国翌杨艳阳
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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