Organic-inorganic composite phase change heat storage material and preparation method thereof

A phase change heat storage material and inorganic composite technology are applied in the field of organic-inorganic composite phase change heat storage materials and their production methods, which can solve the problem of poor thermal conductivity of phase change heat storage materials, unsatisfactory material rapid charge and release, It can improve the bonding interface, enhance the strength and structural stability of the matrix, and reduce the porosity.

Inactive Publication Date: 2020-05-22
管玲飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an organic-inorganic composite phase-change heat storage material and its preparation method, and solves the problem that the existing composite phase-change heat storage Leakage, and the matrix is ​​easy to denature during the long-term continuous phase change process. At the same time, it solves the problem that the thermal conductivity of the phase change heat storage material is poor, and the problem of rapid charge and discharge of the material is not satisfied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027](1) Preparation of La-doped diamond-Cu composite: add 1 part of lanthanum carbonate hydrate, 50 parts of diamond and 22 parts of nano-copper powder to the high-energy planetary ball mill in sequence, and add 400 mL of absolute ethanol, and set the revolution speed of the ball mill to 50rpm, the rotation speed is 620rpm, ball milling is carried out for 3h, the material is passed through the high-speed centrifuge, the centrifugal speed is 6000rpm, the absolute ethanol is removed by centrifugation, and the obtained solid mixture is placed in the SPS discharge plasma sintering furnace, the setting pressure is 55MPa, the heating rate 10°C / min, raised to 1200°C for sintering process, after sintering, cool the material to room temperature, use 100mL dilute hydrochloric acid with a substance concentration of 1.9mol / L and an appropriate amount of distilled water to wash the solid sintered product in sequence, and place it in Heat to 80°C in an oven to fully dry the water to obtain...

Embodiment 2

[0031] (1) Preparation of La-doped diamond-Cu composite: Add 1.5 parts of lanthanum carbonate hydrate, 47 parts of diamond and 23 parts of nano-copper powder to the high-energy planetary ball mill in sequence, and add 400 mL of absolute ethanol, and set the revolution speed of the ball mill to 50rpm, the rotation speed is 640rpm, ball milling is carried out for 4h, the material is passed through the high-speed centrifuge, the centrifugal speed is 8000rpm, the absolute ethanol is removed by centrifugation, and the obtained solid mixture is placed in the SPS discharge plasma sintering furnace, the setting pressure is 60MPa, the heating rate 10°C / min, raised to 1200°C for sintering process, after sintering, cool the material to room temperature, use 150mL dilute hydrochloric acid with a substance concentration of 2.5mol / L and an appropriate amount of distilled water to wash the solid sintered product successively, and place it in Heat to 90°C in an oven to fully dry the water to o...

Embodiment 3

[0035] (1) Preparation of La-doped diamond-Cu composite: Add 1.5 parts of lanthanum carbonate hydrate, 45 parts of diamond and 24 parts of nano-copper powder to the high-energy planetary ball mill in sequence, and add 500 mL of absolute ethanol, and set the revolution speed of the ball mill to 70rpm, the rotation speed is 640rpm, ball milling is carried out for 5h, the material is passed through the high-speed centrifuge, the centrifugal speed is 8000rpm, and the absolute ethanol is removed by centrifugation, the solid mixture is placed in the SPS discharge plasma sintering furnace, the setting pressure is 60MPa, the heating rate 10°C / min, raised to 1250°C for sintering process, after sintering, cool the material to room temperature, use 150mL dilute hydrochloric acid with a substance concentration of 2.5mol / L and an appropriate amount of distilled water to wash the solid sintered product successively, and place in Heat to 100°C in an oven to fully dry the water to obtain La-do...

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PUM

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Abstract

The invention relates to the technical field of composite phase change heat storage materials, and discloses an organic-inorganic composite phase change heat storage material and a preparation methodthereof. Raw materials comprise aminated graphene, docosanedioic acid, lanthanum carbonate hydrate, diamond and nano copper powder. According to the material and the method, the docosanedioic acid isused as a phase change material; a hydrothermal synthesis-melt blending method is adopted so that the docosanedioic acid and the aminated graphene are combined together in a manner of forming an amidogroup; the problems that an organic phase is easy to leak and a matrix is easy to denature in the phase change process of the material are avoided; La<3+> is embedded into a crack defect part in an internal interface of the diamond-Cu compound, so that a bonding interface between diamond and Cu is improved, the density of the diamond-Cu compound is improved, the porosity is reduced, and the matrix strength and the structural stability of the compound are enhanced, and therefore, the diamond-Cu compound has higher heat absorptivity and heat conductivity.

Description

technical field [0001] The invention relates to the technical field of composite phase change heat storage materials, in particular to an organic-inorganic composite phase change heat storage material and a preparation method thereof. Background technique [0002] Phase change materials refer to substances that change the form of matter and provide latent heat under constant temperature conditions. The phase change process is the process of changing the physical form of an object. Phase change materials have the ability to change their physical state within a certain temperature range. When it absorbs or releases a large amount of heat energy, phase change materials have excellent heat storage performance, and heat is stored in the form of sensible heat and latent heat. When melting into a liquid state, a large amount of heat of fusion is required to absorb and store heat. After the heat is released, the medium returns to a solid state, and the phase change cycle is repeated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 管玲飞
Owner 管玲飞
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