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A kind of phase change energy storage material with pod structure and its preparation method and application

A phase-change energy storage material and a technology of phase-change materials, which are applied in the field of functional energy devices, can solve the problems that the stability and durability need to be further improved, the inability to realize large-scale continuous preparation, and the wide application of phase-change fibers are limited, and achieve continuous Controllable large-scale preparation, good cycle stability, uniform size effect

Active Publication Date: 2021-11-02
江西省纳米技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research and development of phase change composite materials is developing towards higher energy storage density, better comfort and deeper green environmental protection concepts, and is constantly seeking to complement and compound with other functional materials. However, the current phase change energy storage reported at home and abroad Composite materials have disadvantages such as low enthalpy, stability and durability to be further improved, and cannot meet the requirements of industrialization, thus limiting the wide application of phase change fibers
[0003] The prior art mainly has the following disadvantages: 1) The currently used methods of coating phase change materials, such as the microcapsule structure, have low phase change capacity, and are relatively dispersed and cannot achieve large-scale continuous preparation; while the fiber core sheath structure is an integral unit, One sheath was damaged, causing all phase change materials to leak; 2) Since phase change materials are mainly used for heat storage and release, and because polymers have poor thermal conductivity as the shell, the current technology cannot achieve rapid heat transfer. Materials with excellent thermal conductivity, such as carbon materials, can be used in the shell layer coated with phase change materials

Method used

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  • A kind of phase change energy storage material with pod structure and its preparation method and application
  • A kind of phase change energy storage material with pod structure and its preparation method and application
  • A kind of phase change energy storage material with pod structure and its preparation method and application

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preparation example Construction

[0026] One aspect of the embodiments of the present invention provides a method for preparing a phase-change energy storage material with a pod structure, which includes:

[0027] Provide a liquid phase change material as the core layer printing ink;

[0028] Provide graphene oxide dispersion as shell printing ink;

[0029] And, using 3D printing technology, intermittently inject the core layer printing ink into the inner layer of the coaxial printing needle, and continuously inject the shell layer printing ink into the outer layer of the coaxial printing needle for coaxial printing, so as to obtain a Phase change energy storage materials with pod structure.

[0030] In the present invention, figure 1 It is a schematic flow chart of a preparation method of a phase-change energy storage material with a pod structure; Figure 2a-Figure 2f For 3D printing different shapes of phase change energy storage materials with pod structure without drying reduction treatment; Figure 3...

Embodiment 1

[0061] Heat the n-octadecane (OD) water bath to 30°C, connect the peristaltic pump to obtain the nuclear layer printing ink, the temperature of the graphene oxide dispersion is 10°C, control the speed of the peristaltic pump to 0.8rap, and the outer layer of the graphene oxide dispersion is solid The content is 40mg / ml (as shell printing ink), which is injected continuously using a syringe pump, the flow rate is controlled to 400μl / min, the temperature of the hot bed of the 3D printer is set to 20°C, and the operating speed of the printer is 3mm / s; aluminum foil is used as the printing substrate , set the core-shell solution in the inner and outer channels of the 3D printing coaxial needle, the height of the coaxial needle from the printer’s hot bed is 1mm, select the defined model of the 3D printer, and then perform drying and reduction treatment to obtain a phase transition with a pod structure Energy storage material (denoted as OD / graphene), the particle size of pod structu...

Embodiment 2

[0064] Heat the n-octadecane water bath to 30°C, connect the peristaltic pump to obtain the nuclear layer printing ink, the temperature of the graphene oxide dispersion is 20°C, control the speed of the peristaltic pump to 1.2rap, and the solid content of the outer graphene oxide dispersion is 45mg / ml (as shell printing ink), inject continuously using a syringe pump, control the flow rate to 600μl / min, set the temperature of the hot bed of the 3D printer to 25°C, and the operating speed of the printer to 3mm / s; use aluminum foil as the printing substrate, and The shell solution is set in the inner and outer channels of the 3D printing coaxial needle. The height of the coaxial needle from the printer’s hot bed is 1mm. The defined model of the 3D printer is selected, and then dried and reduced to obtain a phase change energy storage material with a pod structure. , the particle size of the pod structure is 0.8mm.

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Abstract

The invention discloses a phase-change energy storage material with a pod structure, a preparation method and application thereof. The preparation method includes: using 3D printing technology, intermittently injecting the phase change material used as the core layer printing ink into the inner layer of the coaxial printing needle, and continuously injecting the graphene oxide dispersion liquid used as the shell layer printing ink into the coaxial printing needle The outer layer is coaxially printed to obtain a phase-change energy storage material with a pod structure. The phase-change energy storage material with a pod structure prepared by the present invention realizes the independent packaging of the phase-change material, successfully realizes the independent packaging and continuous preparation of the phase-change material, and has a relatively high phase-change latent heat; at the same time, the preparation method process Simple, repeatable, and has good cycle stability, that is, the coating rate can reach 100% after 1000 cycles of cooling and heating. The size of the phase change structure is controllable and uniform, and can be applied to phase change heat storage and smart clothing and other fields.

Description

technical field [0001] The invention belongs to the technical field of functional energy devices, and in particular relates to a phase-change energy storage material with a pod structure and a preparation method and application thereof. Background technique [0002] With the continuous development of society, people's demand for environment-friendly renewable new energy application technology is increasing. Among them, the storage and utilization of thermal energy are related to the national economy and people's livelihood. Heat storage technology is an important technology to effectively utilize existing energy, rationally use renewable energy and improve its utilization efficiency. Among energy storage and energy release technologies, phase change materials (PCMs) have great potential to meet the growing demands in the fields of smart thermal energy management and portable thermal energy. With the continuous development of phase change materials, using the characteristics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06C09K5/14
CPCC09K5/063C09K5/14Y02E60/14Y02E70/30
Inventor 张永毅贾胜敏吕小婷李清文刘美男
Owner 江西省纳米技术研究院
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