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Phase change microcapsule simultaneously having magnetism and photo-thermal conversion feature and preparation method thereof

A technology of phase change microcapsules and light-to-heat conversion, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of inability to achieve light-to-heat conversion energy storage and magnetic regulation, and single-function phase change microcapsules , to achieve the effect of improving supercooling phenomenon, good product uniformity and cost saving

Active Publication Date: 2019-03-29
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a phase-change microcapsule with both magnetic properties and light-to-heat conversion properties, which solves the problem that the existing phase-change microcapsules have single functions and cannot perform light-to-heat conversion energy storage and magnetic regulation in the same system uniform defect

Method used

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  • Phase change microcapsule simultaneously having magnetism and photo-thermal conversion feature and preparation method thereof
  • Phase change microcapsule simultaneously having magnetism and photo-thermal conversion feature and preparation method thereof
  • Phase change microcapsule simultaneously having magnetism and photo-thermal conversion feature and preparation method thereof

Examples

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Embodiment 1

[0033] A phase-change microcapsule with both magnetic properties and light-to-heat conversion properties, comprising a wall material and a core material wrapped in the wall material, the core material comprising n-octadecane and oleic acid-coated ferric iron tetroxide nanoparticles , the wall material includes melamine formaldehyde resin and graphene oxide, and the mass ratio of the core material to the wall material is about 1:1.05. The preparation process is as follows:

[0034] (1) Phase change microcapsule core material pretreatment:

[0035] Weigh 2.322g FeCl respectively 3 ·6H 2 O, 0.8557gFeCl 2 4H 2 O and 150ml of deionized water were added to the three-necked flask, protected by nitrogen, and dissolved in a 60°C water bath with mechanical stirring at a speed of 600rpm, and then 6.19ml of ammonia water was added to 80ml of deionized water for dissolution and quickly poured into the three-necked flask. Continue to stir for 30 minutes, then add 6.4ml of oleic acid, i...

Embodiment 2

[0048] A phase-change microcapsule with both magnetic properties and light-to-heat conversion properties, comprising a wall material and a core material wrapped in the wall material, the core material comprising n-octadecane and oleic acid-coated ferric iron tetroxide nanoparticles , the wall material includes melamine formaldehyde resin and graphene oxide, and the mass ratio of the core material to the wall material is 1:1.05.

[0049] Its preparation method is the same as that of Example 1, except that the amount of ferric oxide coated with oleic acid is 0.3 g.

Embodiment 3

[0051] A phase-change microcapsule with both magnetic properties and light-to-heat conversion properties, comprising a wall material and a core material wrapped in the wall material, the core material comprising n-octadecane and oleic acid-coated ferric iron tetroxide nanoparticles , the wall material includes melamine formaldehyde resin and graphene oxide, and the mass ratio of the core material to the wall material is 1:1.05.

[0052] Its preparation method is the same as that of Example 1, except that the added amount of ferric oxide coated with oleic acid is 0.6 g.

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Abstract

The invention discloses a phase change microcapsule simultaneously having magnetism and photo-thermal conversion feature and a preparation method thereof. The phase change microcapsule is composed ofa core material and a wall material coating the core material; wherein the core material includes a normal alkane phase-change material and a surface-modified magnetic iron oxide, and the wall material includes a high-molecular resin material and a carbon material; mass ratio of the core material to the wall material is 1:1.05. The preparation method includes: firstly respectively pretreating thecore material and wall material: (1) stirring and mixing magnetic particles and the liquid phase-change material and performing ultrasonic treatment; (2) after a wall material prepolymer is prepared,adding the material with the photo-thermal conversion feature to the wall material prepolymer, and performing ultrasonic dispersion; then synthesizing the phase change microcapsule composite materialthrough in-situ polymerization. The phase change microcapsule has excellent phase-change heat storage performance, photo-thermal conversion performance and magnetism regulation performance. The preparation method is simple in process and employs accessible raw materials, so that the method has extensive industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of phase-change materials, and relates to a phase-change microcapsule, in particular to a phase-change microcapsule having both magnetic properties and light-to-heat conversion properties and a preparation method thereof. Background technique [0002] Phase change materials are a class of very promising thermal energy storage materials, which can be used in many fields such as solar energy storage, energy-saving building materials, and preparation of temperature-regulating fibers. Its main phase transition methods include solid-solid phase transition, solid-liquid phase transition, solid-gas phase transition and liquid-gas phase transition. The heat released or absorbed during the change is called the latent heat of phase change. [0003] Commonly used phase change materials will undergo a transition from solid to liquid during the phase change process, resulting in leakage, so the phase change material nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/06
Inventor 郭成龙高国芮焦少凯张同星吕文正
Owner CHINA UNIV OF MINING & TECH
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