Method for improving bonding strength of low-emissivity coating and carbon fiber base material

A low-emissivity coating and carbon fiber substrate technology, which is applied in the fields of carbon fiber, fiber treatment, textiles and paper making, can solve the problems of low-emissivity coating and substrate bond strength reduction, poor mechanical properties, and difficult experimental operations And other issues

Active Publication Date: 2021-05-11
四川智溢实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the Chinese patent "Preparation Method of Resin-based Composite Guide Vane Anti-scouring Coating" (publication number: CN110257752A) applied by China Aviation Development Beijing Aeronautical Materials Research Institute, it is disclosed that a traditional anti-scour coating The method of adding a resin-metal primer layer and a metal intermediate layer structure in the layer alleviates the problem of thermal expansion coefficient mismatch of the coating and makes it meet the requirements of long-term use at 300 ° C. The disadvantage is that

Method used

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  • Method for improving bonding strength of low-emissivity coating and carbon fiber base material
  • Method for improving bonding strength of low-emissivity coating and carbon fiber base material
  • Method for improving bonding strength of low-emissivity coating and carbon fiber base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] S1: Cleaning the surface of the polyimide-based carbon fiber substrate with an organic solvent;

[0051] S2: Prepare a layer of 5-10 μm silicone resin on the surface of the polyimide-based carbon fiber substrate. After the surface is dry, place it at 200°C and cure for 4 hours to obtain the pretreated polyimide-based carbon fiber substrate;

[0052] S3: Take 60g of organic solvent, add 30g of silicone resin and 30g of flake aluminum powder, stir and disperse at a speed of 600r / min for 10min to obtain a coating;

[0053] S4: Prepare the prepared coating on the pretreated polyimide-based carbon fiber substrate, and then place it at room temperature for 6 hours. After it is surface-dried, cure it at 200°C for 4 hours to obtain a coating thickness of 50~ 60 μm sample.

[0054] Wherein, the organic solvent includes ethyl acetate and butyl acetate, and the mass ratio of ethyl acetate and butyl acetate is 2:1.

Embodiment 2

[0056] S1: heat-treat the polyimide-based carbon fiber substrate in a high-temperature muffle furnace at 500°C for 2 minutes;

[0057] S2: using an organic solvent to clean the surface of the polyimide-based carbon fiber substrate;

[0058] S3: Prepare a layer of 5-10 μm silicone resin on the surface of the polyimide-based carbon fiber substrate. After the surface is dry, place it at 200°C and cure for 4 hours to obtain the pretreated polyimide-based carbon fiber substrate;

[0059] S4: Take 60g of organic solvent, add 30g of silicone resin and 30g of flake aluminum powder, stir and disperse at a speed of 600r / min for 10min to obtain a coating;

[0060] S5: Prepare the prepared coating on the pretreated polyimide-based carbon fiber substrate, and then place it at room temperature for 6 hours. After it is surface-dried, cure it at 200°C for 4 hours to obtain a coating thickness of 50~ 60 μm sample.

[0061] Wherein, the organic solvent includes ethyl acetate and butyl acetat...

Embodiment 3

[0063] S1: heat-treat the polyimide-based carbon fiber substrate in a high-temperature muffle furnace at 500°C for 4 minutes;

[0064] S2: using an organic solvent to clean the surface of the polyimide-based carbon fiber substrate;

[0065] S3: Prepare a layer of 5-10 μm silicone resin on the surface of the polyimide-based carbon fiber substrate. After the surface is dry, place it at 200°C and cure for 4 hours to obtain the pretreated polyimide-based carbon fiber substrate;

[0066] S4: Take 60g of organic solvent, add 30g of silicone resin and 30g of flake aluminum powder, stir and disperse at a speed of 600r / min for 10min to obtain a coating;

[0067] S5: Prepare the prepared coating on the pretreated polyimide-based carbon fiber substrate, and then place it at room temperature for 6 hours. After it is surface-dried, cure it at 200°C for 4 hours to obtain a coating thickness of 50~ 60 μm sample.

[0068] Wherein, the organic solvent includes ethyl acetate and butyl acetat...

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Abstract

The invention relates to a method for improving the bonding strength of a low-emissivity coating and a carbon fiber base material, and solves the problem that the mechanical properties of the coating and the carbon fiber base material are reduced due to high-temperature failure of an organic resin binder on the surface of the carbon fiber base material compared with a traditional direct spraying method. By means of high-temperature pretreatment and preparation of an organic silicon resin middle layer, the binding force of the coating and the surface of the base material is increased, an obtained sample has the advantages of being resistant to high temperature, low in emissivity, high in adhesive force and the like, good infrared performance and good mechanical performance can be achieved, the adhesive force of the sample is about 5.0 +/-0.4 Mpa after the sample is subjected to high-temperature heat treatment for 30 min at the temperature of 500 DEG C, and the requirements of various fields on good binding force of the high-temperature-resistant low-emissivity coating and the polyimide carbon fiber base material are met.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a method for improving the bonding strength of a low-emissivity coating and a carbon fiber substrate. Background technique [0002] In the field of aerospace, in order to meet a series of requirements such as impact resistance and compression resistance, most aircraft surfaces use a large number of high-strength materials (mostly metals, alloys, and ceramics). However, these materials have a high density, so the overall weight is relatively large, and a substantial increase in weight will lead to an increase in fuel and a sharp shortening of the voyage. If lightweight and high-strength composite materials are used, the power required by the aircraft can be greatly reduced, and the range of the aircraft can also be increased. Composite materials can be compounded by a variety of materials (two or more heterogeneous, heterogeneous, heterogeneous materials)...

Claims

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Application Information

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IPC IPC(8): D06M11/83D06M15/643D06M101/40
CPCD06M15/643D06M11/83D06M2101/40
Inventor 齐伦黄刚刘勇杜兴波黄艳
Owner 四川智溢实业有限公司
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