Organic phase-change fluid material and preparation method and application thereof

A phase change material and organic phase technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of reducing material storage, exothermic performance and cycle service life, poor crystallization nucleation performance, and supercooling phenomenon. , to achieve the effect of low experimental equipment requirements, good stability, and large phase transition temperature range

Inactive Publication Date: 2020-05-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic phase change materials, especially hydrated inorganic salts, also have some inherent disadvantages: it is easy to lose crystallization water during the phase change process, resulting in poor crystallization nucleation performance, and there is also supercooling phenomenon, which reduces the material. Storage and release performance and cycle life
However, there are still problems such as low thermal conductivity, flammability, and fluidity of liquids during the phase transition process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of a new type of phase change material in this embodiment, the raw material formula is shown in Table 1.

[0033] Table 1

[0034] components mass, g Myristyl palmitate (purity ≥ 95%) 6 Myristyl octadecanoate (purity ≥ 95%) 12 Cetyl cetyl ester (purity ≥ 95%) 16 Steareth-100, Steareth-100 3 Steareth-20, Steareth-20 1 Steareth-2, Steareth-2 1 Polyvinyl alcohol 86-89% hydrolyzed 5 Oleth 20, Oleyl Alcohol Ethoxylate 1 Magnesium stearate 2 glycerin 5 Deionized water 150

[0035] (1) Weigh each raw material according to the formula, and then preheat all raw materials (deionized water, phase change material, emulsifier and nucleating agent, etc.) separately to 75°C to prevent crystallization of the phase change material.

[0036] (2) Add the preheated myristyl cetanoate, myristyl octadecanoate and cetyl cetyl cetyl to the three-necked flask successively. During this period, the th...

Embodiment 2

[0041] The preparation of a new type of phase change material in this embodiment, the raw material formula is shown in Table 2.

[0042] Table 2

[0043] components mass, g Tridecyl Pentadecanoate (purity≥95%) 6 Tridecyl 17-decanoate (purity ≥ 95%) 12 Myristyl Myristate (Purity≥95%) 16 Nonoxynol 3 polyoxyethylene lauryl ether 1 Ceteth-12 1 polyvinylcyclobutane 5 Oleth 20, Oleyl Alcohol Ethoxylate 1 Magnesium stearate 2 glycerin 5 Deionized water 150

[0044] (1) Preheat all raw materials (deionized water, phase change material, emulsifier and nucleating agent, etc.) to 75°C.

[0045] (2) Mix the preheated myristyl palmitate, myristyl stearate and cetyl palmitate, and stir with a stirrer at a low speed for 15 minutes to prepare a dispersed phase.

[0046] (3) Add the preheated steareth-100, steareth-20, steareth-2, polyvinyl alcohol, oleyl polyoxyethylene ether, magnesium stearate and glycerin To...

Embodiment 3

[0050]The preparation of a new type of phase change material in this embodiment, the raw material formula is shown in Table 3.

[0051] table 3

[0052] components mass, g Tridecyl 17-decanoate (purity ≥ 95%) 6 Polymethyl methacrylate (purity ≥ 95%) 12 Stearic acid (purity ≥ 95%) 16 Dodecyl Heptapolyethylene Glycol Ether 3 Cetyl 1,3 Propylene Glycol Ether 1 Oleth-8 1 Polyvinyl-2-methylcyclohexane 5 poly-3-methyl-1-butene 1 polycyclopentene 2 glycerin 5 Deionized water 150

[0053] (1) Preheat all raw materials (deionized water, phase change material, emulsifier and nucleating agent, etc.) to 75°C.

[0054] (2) Mix the preheated myristyl palmitate, myristyl stearate and cetyl palmitate, and stir with a stirrer at a low speed for 15 minutes to prepare a dispersed phase.

[0055] (3) Add the preheated steareth-100, steareth-20, steareth-2, polyvinyl alcohol, oleyl polyoxyethylene ether, magnesium st...

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Abstract

The invention belongs to the technical field of phase change materials, and particularly discloses an organic phase change fluid material and a preparation method and application thereof. The method specifically comprises the following steps: (1) mixing an emulsifier, a nucleating agent, water and glycerol, adding nanoscale aluminum nitride and molybdenum disulfide, and performing uniform mixing to obtain a turbid solution; and (2) uniformly mixing the turbid solution obtained in the step (1) with a phase change material to obtain a fatty acid ester water-based emulsion, and cooling the fattyacid ester water-based emulsion to room temperature to obtain the fluid phase change material. The novel fluid phase-change material prepared by the invention is an emulsion, and since ester is used as the phase-change material, the latent heat of phase change is higher than that of other organic phase-change materials, the stability is better, the heat conductivity is higher, and the heat conductivity coefficient is 0.3-1.4W / m / DEG C. The preparation process is simple, has low requirements on experimental apparatuses, is easy to control and can be widely applied to the field of heat storage and transfer.

Description

technical field [0001] The invention belongs to the technical field of phase change materials, and in particular relates to an organic phase change fluid material and its preparation method and application. Background technique [0002] Phase change materials are the core of latent heat storage technology. Its biggest feature is that it can provide latent heat by changing the phase state or crystal structure of the substance under the condition of constant temperature. The process of changing physical properties is called a phase change process, and the phase change material will absorb or release a large amount of latent heat at this time. Because phase change materials can store or release heat quickly, many researchers have invested a lot of manpower, material resources and financial resources in research. [0003] However, current phase change materials can be roughly divided into two categories: inorganic and organic. Inorganic phase change materials, which have the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 胡剑峰苏皓吴直康瞿金清
Owner SOUTH CHINA UNIV OF TECH
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