High-temperature shape-stabilized phase-change composite material and preparation method thereof

A technology of composite materials and shape-fixed phase change, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of lack of mechanical properties and high-temperature shape-set phase change composite materials, achieve wide application prospects, improve thermal control capabilities, and prepare The effect of simple process

Active Publication Date: 2020-07-10
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, there is currently a lack of high-temperature shape-setting phase-change composites with good mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, the high-temperature shape-setting phase-change composite material has a raw material ratio of: 50 g of lithium nitrate phase-change microcapsules, 40 g of polysiloxazane, and 10 g of glass fiber. After stirring and mixing evenly, three-roll grinding is used to mix for 3 hours to form a composite material blank.

[0019] Then, a high-temperature shape-setting phase-change composite block is prepared by a molding process.

[0020] Finally, the high-temperature shape-setting phase-change composite material is cured at room temperature for ≥48 hours.

[0021] The phase change temperature of the high-temperature shape-setting phase change composite material is 253°C, the maximum service temperature is 500°C, the phase change enthalpy is 160kJ / kg, and the compressive strength is 2.0MPa.

Embodiment 2

[0023] First, the high-temperature shape-setting phase-change composite material, the raw material ratio is: 60g of lithium nitrate phase-change microcapsules, 40g of polysiloxazane, after stirring and mixing evenly, three-roll grinding and mixing for 3 hours to form a composite material blank.

[0024] Then, a high-temperature shape-setting phase-change composite block is prepared by a molding process.

[0025] Finally, the high-temperature shape-setting phase-change composite material is cured at room temperature for ≥48 hours.

[0026] The phase change temperature of the high-temperature shape-setting phase change composite material is 253°C, the maximum service temperature is 500°C, the phase change enthalpy is 190kJ / kg, and the compressive strength is 0.6MPa.

Embodiment 3

[0028] First, the high-temperature shape-setting phase-change composite material. The raw material ratio is: 70g of lithium nitrate high-temperature shape-setting phase-change powder, 25g of polysiloxazane, and 5g of glass fiber. After stirring and mixing evenly, use three-roller grinding and mixing for 5 hours to form a composite material billet.

[0029] Then, a high-temperature shape-setting phase-change composite block is prepared by a molding process.

[0030] Finally, the high-temperature shape-setting phase-change composite material is cured at room temperature for ≥48 hours.

[0031] The phase change temperature of the high-temperature shape-setting phase change composite material is 253°C, the maximum service temperature is 500°C, the phase change enthalpy is 200kJ / kg, and the compressive strength is 1.5MPa.

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Abstract

The invention discloses a high-temperature shape-stabilized phase-change composite material and a preparation method thereof. According to the composite material, a high-temperature phase change microcapsule or high-temperature shape-stabilized phase change powder is used as a phase change functional filler, ceramic precursor resin is used as a matrix phase of the composite material, the phase change thermophysical property is adjusted by adjusting the content of phase change functional filler in the composite material, the composite material can be cured at room temperature or heated and cured by adopting a mould pressing process, the phase change temperature of the composite material ranges from 200 DEG C to 900 DEG C, and the highest use temperature reaches 900 DEG C. The high-temperature shape-stabilized phase-change composite material is simple in preparation process and can be cured or heated at room temperature and is excellent in thermal control performance and can be used forthermal control of aircraft structures and instruments and equipment such as missile, rocket, ship and aircraft and improves the thermal control capability and has potential wide application prospectsin the civil field.

Description

technical field [0001] The invention relates to a high-temperature shape-setting phase-change composite material and a preparation method thereof, in particular to a high-temperature phase-change composite material, which belongs to the technical field of phase-change composite material preparation. Set the shape. Background technique [0002] Phase change materials have the advantages of large heat storage, programmable phase change thermal control temperature, stable and reliable performance, and are an important direction for the development of thermal control materials. With the continuous increase of the flight speed and flight time of the aircraft, the aerodynamic environment of the aircraft is becoming more and more severe, and the demand for thermal control of the aircraft structure is getting higher and higher. As an important thermal control material, phase change materials are increasingly used in aircraft thermal control. In terms of phase change thermal contro...

Claims

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Application Information

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IPC IPC(8): C08L83/14C08K7/14C08K9/10C08K3/28C08K3/22C08K7/10C08K7/08C08K3/16C08K7/06C09K5/06
CPCC08K7/14C08K9/10C08K3/28C08K3/22C08K7/10C08K7/08C08K3/16C08K7/06C09K5/063C08K2003/2203C08K2201/014C08L2201/08C08L83/14
Inventor 李俊峰罗正平王萌李颖孙理理
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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