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A bionic self-repairing heat storage composite material and its preparation method

A composite material, self-healing technology, applied in the direction of heat exchange materials, chemical instruments and methods, ceramic products, etc., can solve the problems of composition segregation, affecting the performance and life of composite phase change heat storage materials, and achieve the purpose of alleviating segregation. Effect

Active Publication Date: 2022-06-21
JILIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difference in the wettability of different molten salts to the surface of the ceramic skeleton, component segregation easily occurs on the surface of the skeleton, which affects the performance and life of the composite phase change heat storage material.

Method used

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  • A bionic self-repairing heat storage composite material and its preparation method
  • A bionic self-repairing heat storage composite material and its preparation method

Examples

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Embodiment Construction

[0018] The technical solutions of the present invention will be further explained and illustrated below in the form of specific embodiments.

[0019] 1) Soak a polyurethane sponge with a pore size of 0.5-3mm in 20wt% NaOH solution for 2 hours.

[0020] 2) Immerse the polyurethane sponge in the ceramic slurry, make the slurry completely fill the inside of the sponge, and extrude the excess slurry. The thickness of the slurry attached to the surface of the sponge mesh is 0.2-0.5mm, and then it is statically dried for 24 hours to shape.

[0021] 3) Put the shaped foam into a high-temperature furnace, keep the temperature at 500-600°C for 2 hours, burn the polyurethane, and then continue to heat up to 1450°C and keep the temperature for 2 hours to obtain porous ceramics; the obtained porous ceramics have the following characteristics: a ) The three-dimensional structure of the void is the same as that of the polyurethane foam, which is an interconnected structure; b) the outer dia...

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Abstract

The invention discloses a bionic self-repairing heat storage composite material and a preparation method thereof, belonging to the technical field of phase change heat storage materials. The present invention imitates the structure of bone marrow in the bone marrow cavity of long bones, and is formed by filling the gaps of the porous ceramic skeleton with multiple core materials. All of them are filled into the voids formed by the hole wires, and the components with the best wettability with the hole wire materials in the multi-component core material are individually filled in the hollow cavities of the hole wires. The invention slows down the segregation of the multi-element core material on the surface of the hole wire by filling the hollow part of the ceramic hole silk with components with good wettability in advance, and solves the problem of segregation of the multi-element core material on the wall surface of the ceramic skeleton.

Description

technical field [0001] The invention belongs to the technical field of phase change heat storage materials. Background technique [0002] The composite phase change heat storage material is composed of a phase change core material and a carrier skeleton, wherein the phase change core material acts as a carrier for heat storage, and the carrier skeleton plays the role of enhancing thermal conductivity and load. For medium and high temperature heat storage systems, the core material is molten salt, and the skeleton is usually a ceramic material. In order to meet the temperature requirements for system operation, it is usually necessary to compound the phase change core material to form binary or multi-component materials, so that the phase change temperature point is close to the system operating temperature. Due to the difference in the wettability of different molten salts on the surface of the ceramic skeleton, component segregation easily occurs on the surface of the skel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/10C04B35/565C04B35/581C04B35/584C04B41/85C09K5/06
CPCC04B38/062C04B35/565C04B35/581C04B35/584C04B35/10C04B41/5012C04B41/85C09K5/063C04B41/5011C04B41/501C04B41/5009C04B41/4535
Inventor 田丽梅李子源王养俊王欢商震
Owner JILIN UNIV
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