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Multilayer thermal control assembly and preparation method thereof

A component and thermal control technology, applied in the direction of chemical instruments and methods, lamination, coating, etc., can solve the problems of reducing thermal insulation performance, leakage of phase change materials, and impossibility of realization, so as to reduce thermal conductivity and ensure thermal insulation Effect, the effect of improving the heat insulation effect

Pending Publication Date: 2022-01-11
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] ②Addition of too much phase change material will lead to an increase in the overall thermal conductivity of the material, thereby reducing the thermal insulation performance, and at the same time adding too little can not achieve its function, so the amount of phase change material added should be controlled
[0009] ① Most of the phase change materials are solid-liquid phase changes. After the phase change, there is liquid leakage, which is easy to form redundant substances. How to prevent the leakage of phase change materials is the key to realize the preparation of multi-layer thermal control components;

Method used

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  • Multilayer thermal control assembly and preparation method thereof
  • Multilayer thermal control assembly and preparation method thereof

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preparation example Construction

[0044] The preparation method of the multi-layer thermal control assembly of the present invention specifically comprises the following steps:

[0045] (1) Mix the phase change material and the binder, the mass ratio of the phase change material and the binder is: 0.5-1:1, then add a solvent to the mixture of the phase change material and the binder and stir evenly, The viscosity of the mixed solution is 20-35s, the mixed solution is sprayed on the surface of the spacer layer, and solidified to form a spacer layer containing the phase change material.

[0046] The phase change material has a microcapsule structure, and the microcapsule structure is an alkane microcapsule or a paraffin microcapsule, and the particle size is 50-200 μm. The microcapsule structure is a single type of alkane microcapsule or a mixture of different types of alkane microcapsules; or the microcapsule structure is a single type of paraffin microcapsule or a mixture of different types of paraffin microca...

Embodiment 1

[0053] 1. Phase change material coating: Mix silicone rubber and docosane microcapsules at a weight ratio of 1:0.7, mix the silicone rubber and docosane microcapsules evenly by adding gasoline and adjust the viscosity to 25-30s, Coated on the surface of the nylon mesh by spraying, the spray gun diameter is 2.0mm, the spraying distance is 18-26cm, the spraying thickness is 150±20μm, and it is used after 24 hours of curing;

[0054] 2. Layer: according to figure 1 In the structure shown, the aluminized polyimide film and the heat insulation layer are alternately laminated, and the number of laminated layers is 11; the heat insulation layer is nylon mesh and the above-mentioned nylon mesh sprayed with phase change material, which is automatically The sixth layer from top to bottom is nylon mesh sprayed with phase change material, and the remaining layers are nylon mesh.

[0055] Implementation effect: The equivalent thermal conductivity of the prepared multilayer thermal control...

Embodiment 2

[0058] 1. Phase change material coating: Mix silicone rubber and docosane microcapsules at a weight ratio of 1:0.7, mix the silicone rubber and docosane microcapsules evenly by adding gasoline and adjust the viscosity to 25-30s, Coated on the surface of the nylon mesh by spraying, the spray gun diameter is 2.0mm, the spraying distance is 18-26cm, the spraying thickness is 150±2μm, and it is used after 24 hours of curing;

[0059] 2. Layer: according to figure 1 In the structure shown, the aluminized polyimide film and the heat insulation layer are alternately laminated, and the number of laminated layers is 11; the heat insulation layer is nylon mesh and the above-mentioned nylon mesh sprayed with phase change material, which is automatically The 4th and 6th layers from top to bottom are nylon meshes sprayed with phase change materials, and the remaining layers are nylon meshes.

[0060] Implementation effect: The equivalent thermal conductivity of the prepared multilayer the...

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Abstract

The invention relates to a multi-layer thermal control assembly and a preparation method thereof. The multi-layer thermal control assembly is formed by alternately overlapping reflecting layers with high reflectivity and specially prepared spacing layers with low thermal conductivity, and at least one of the spacing layers contains a phase change material with a microcapsule structure with a certain particle size. The heat insulation effect of the whole assembly is improved by adding a phase change layer in the multi-layer heat insulation assembly, and the phase change material is coated with microcapsules and a flexible packaging material so as to ensure that the phase change material cannot leak after solid-liquid phase change. According to the assembly and the method , the phase change material can be effectively utilized, the heat conductivity of the whole assembly is reduced, the heat insulation temperature can be controlled to be close to a phase change temperature, and constant-temperature heat insulation and accurate heat control are realized. The phase change material microcapsules are sprayed on the surface of the heat insulation layer to realize uniform dispersion of the phase-change material, the content of the phase-change material is controlled by controlling the dosage and spraying thickness of the phase-change material, and the overall heat insulation effect of the assembly is ensured.

Description

technical field [0001] The invention belongs to the technical field of thermal control, and in particular relates to a multilayer thermal control component and a preparation method thereof. Background technique [0002] Multi-Layer Insulation (MLI for short) is formed by alternate lamination of reflective screens with high reflectivity and spacers with low thermal conductivity. This kind of heat insulation component uses the layer-by-layer reflection of the screen to form a high thermal resistance to radiant heat. It has excellent heat insulation performance under vacuum, and its equivalent thermal conductivity can be as low as 10-3W / (m in theory. K) or less in the order of magnitude. Multi-layer insulation materials are often used in spacecraft thermal control systems to isolate the internal temperature environment of the spacecraft from the rapidly changing external thermal environment and ensure that the instruments and equipment work within the specified temperature ran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B27/12B32B27/02B32B27/34B32B27/08B32B27/36B32B5/02B32B33/00B32B7/027B32B7/023C09D183/04C09D175/04C09D7/63B64G1/58
CPCB32B27/281B32B27/12B32B5/028B32B27/08B32B27/36B32B5/02B32B33/00B32B7/027B32B7/023C09D183/04C09D175/04C09D7/63C09D7/70B64G1/58B32B2255/02B32B2255/26B32B2255/00B32B2037/243B32B2262/0261B32B2307/304B32B2307/416C08K9/10C08K5/01
Inventor 赵立波刘波曾一兵罗正平李俊峰
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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