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A compound phase change microcapsule fluid for high voltage environment and its preparation and application

A composite phase transition and microcapsule technology, applied in the directions of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., to achieve the effects of good mechanical properties, avoiding loss and improving thermal conductivity

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, phase change materials and phase change microcapsules have developed to a certain extent, and there are also supplements for new low voltage requirements, but there are still few phase change microcapsules that can withstand high voltage (international voltage level: 1kV and above). It is almost in a blank state, so it fills in the gaps. In order to be better suitable for more complex and changeable equipment environments, new composite phase change fluids that can work under high voltage need to be developed urgently

Method used

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  • A compound phase change microcapsule fluid for high voltage environment and its preparation and application
  • A compound phase change microcapsule fluid for high voltage environment and its preparation and application
  • A compound phase change microcapsule fluid for high voltage environment and its preparation and application

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Effect test

Embodiment 1

[0045]The preparation of a composite phase-change microcapsule fluid applied in a high-voltage (1kV and above) environment in this embodiment can be used in a direct-contact cold storage device. The raw material formula is shown in Table 1.

[0046] Table 1 Embodiment 1 raw material formula

[0047]

[0048]

[0049] (1) Preheat all the raw materials (deionized water, phase change material, emulsifier and nucleating agent) for preparing the core phase change material to 75°C.

[0050] (2) Mix the preheated phase change materials such as myristyl palmitate and other esters, and stir with a stirrer at a low speed for 15 minutes to prepare the dispersed phase to obtain the first solution; then mix the preheated emulsifier with the synthetic Nucleating agents such as steareth-10, steareth-30, steareth-40, steareth-50, steareth-100, steareth-20 , steareth-2, polyvinyl alcohol, oleyl polyoxyethylene ether, magnesium stearate, glycerin, etc. were added to deionized water, and ...

Embodiment 2

[0057] The preparation of a composite phase-change microcapsule fluid newly applied in a high-voltage (1kV and above) environment in this example can be used in solar photovoltaic photothermal panels. The raw material formula is shown in Table 2.

[0058] Table 2 embodiment 2 raw material formula

[0059]

[0060]

[0061] (1) Preheat all the raw materials (deionized water, phase change material, emulsifier and nucleating agent, etc.) for preparing the core phase change material to 75°C.

[0062] (2) Mix the preheated phase change materials such as tridecyl pentadecyl esters, and stir with a stirrer at low speed for 15 minutes to prepare the dispersed phase to obtain the first solution; then mix the preheated emulsifier with the synthetic Nucleating agents such as nonoxynol ether, polyoxyethylene lauryl ether, ceteth-12, polyvinylcyclobutane, magnesium stearate, and glycerin were added to deionized water, and 0.5 g of nano-scale di Molybdenum sulfide and 0.5 g of nanosc...

Embodiment 3

[0069] The preparation of a composite phase-change microcapsule fluid applied in a high-voltage (1kV and above) environment in this embodiment can be used in a circulating cooling system for a diverter valve. The raw material formula is shown in Table 3.

[0070] Table 3 embodiment 3 raw material formula

[0071]

[0072]

[0073] (1) Preheat all the raw materials (deionized water, phase change material, emulsifier and nucleating agent, etc.) for preparing the core phase change material to 75°C.

[0074] (2) Mix the preheated phase change materials such as tridecyl heptadecanoate and other ester acids, and stir with a stirrer at a low speed for 15 minutes to prepare the dispersed phase to obtain the first solution; then mix the preheated emulsifier With nucleating agents such as lauryl heptaglycol ether, cetyl 1,3 propylene glycol ether, oleth-8, polyvinyl-2-methylcyclohexane, poly-3-methyl - 1-butene, polycyclopentene and glycerol were added to deionized water, and 0.7...

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Abstract

The invention discloses a composite phase-change microcapsule fluid used in a high-voltage environment and its preparation and application; the preparation steps: firstly synthesize a fluid phase-change material and a water-soluble melamine prepolymer, and then prepolymerize the obtained water-soluble melamine The body is mixed with the fatty acid ester aqueous emulsion and emulsified to obtain the enhanced composite heat transfer microcapsules; then the enhanced composite heat transfer microcapsules are mixed with the fluid phase change material evenly to obtain the composite phase change applied to the high voltage environment of 1kV and above Microencapsulated fluid. The composite phase-change microcapsule fluid of the present invention, due to the addition of heat-transfer-enhancing composite microcapsules, greatly reduces the change in particle size of the phase-change fluid during use, and on this basis adds nano-scale insulation-enhancing heat-transfer agents. The mixture of silicon nitride, aluminum oxide and molybdenum disulfide makes the original phase change material more insulating, not easy to be broken down by high voltage, and can be used normally under various high voltages, and the life and heat conduction also have a certain increase and improvement. enhanced.

Description

technical field [0001] The invention belongs to the technical field of phase-change materials, and in particular relates to a compound phase-change microcapsule fluid used in a high-voltage environment, as well as its preparation and application. Background technique [0002] Phase change materials (phase change materials, PCMs) can change the physical state, and can realize the absorption and release of heat energy, or the recovery function of shape memory, recording function etc. [0003] Phase change materials are widely used in the fields of thermal energy storage and temperature control because they can absorb and release a large amount of latent heat during the phase change process. [0004] As the temperature rises, the phase change material absorbs heat; similarly, when the temperature drops, the phase change material releases heat. According to different phase change methods, it can be divided into solid-solid phase change materials and solid-liquid phase change m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02C09K5/06
CPCB01J13/02C09K5/063
Inventor 胡剑峰苏皓瞿金清
Owner SOUTH CHINA UNIV OF TECH
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