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A long-lasting solid lubricant protective coating with excellent resistance to space environment

A space environment, solid lubrication technology, applied in the direction of coating, etc., to achieve excellent resistance to space environment adaptability, long wear life, and improve the effect of space environment radiation resistance and friction and wear performance

Active Publication Date: 2021-03-02
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the existing organic adhesive lubricating coatings are eroded by harsh environments such as atomic oxygen, ultraviolet and ionizing radiation in the space environment, they gradually cannot meet the requirements of development. Therefore, multifunctional organic coatings with high performance and space protection should be developed as much as possible. Adhesion coatings become an urgent need for development in the aerospace field

Method used

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  • A long-lasting solid lubricant protective coating with excellent resistance to space environment
  • A long-lasting solid lubricant protective coating with excellent resistance to space environment
  • A long-lasting solid lubricant protective coating with excellent resistance to space environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 100 g of PAI, 120 g of PTFE, 7 g of octaamino POSS, and solvent nitrogen nitrogen dimethylformamide (remainder). After the raw materials are mixed, they are evenly dispersed by ball milling, and the dispersed lubricating paint is sprayed on the surface of the parts under compressed air (no oil) or compressed nitrogen (the surface of the parts needs to be degreased, derusted, sand blasted, ultrasonically treated in advance) . The sprayed parts should be placed at room temperature for 1~3 h to dry, and then placed in a blast oven for curing. Curing conditions: 150±5°C, constant temperature for 1 hour; 280±5°C, constant temperature for 1 hour, take it out and use it. The main performance indicators of the product are shown in Table 1. The total radiation dose of atomic oxygen (AO) is 2.3×10 21 atom / cm 2 Experiments after irradiation showed that a protective layer of silica was formed on the surface of the POSS-modified coating, and the tribological properties ch...

Embodiment 2

[0033] Weigh 90g of PAI, 110g of PTFE, 5.5g of monoamino POSS, and the solvent nitrogen nitrogen dimethylformamide (the balance). After the raw materials are mixed, they are evenly dispersed by ball milling, and the dispersed lubricating paint is sprayed on the surface of the parts under compressed air (no oil) or compressed nitrogen (the surface of the parts needs to be degreased, derusted, sand blasted, ultrasonically treated in advance) . The sprayed parts should be placed at room temperature for 1~3 h to dry, and then placed in a blast oven for curing. Curing conditions: 150±5°C, constant temperature for 1 hour; 280±5°C, constant temperature for 1 hour, just take it out. The main performance indicators of the product are shown in Table 1. The total radiation dose of atomic oxygen (AO) is 2.3×10 21 atom / cm 2 Irradiation experiments showed that a protective layer of silica was formed on the surface of the POSS-modified coating, and the tribological properties changed lit...

Embodiment 3

[0035] Weigh 85g of PAI, 120g of PTFE, 7.5g of octavinyl POSS, and the solvent nitrogen nitrogen dimethylformamide (the balance). After the raw materials are mixed, they are evenly dispersed by ball milling, and the dispersed lubricating paint is sprayed on the surface of the parts under compressed air (no oil) or compressed nitrogen (the surface of the parts needs to be degreased, derusted, sand blasted, ultrasonic and other surface treatment in advance) . The sprayed parts should be placed at room temperature for 1~3 h to dry, and then placed in a blast oven for curing. Curing conditions: 150±5°C, constant temperature for 1 hour; 280±5°C, constant temperature for 1 hour, just take it out. The main performance indicators of the product are shown in Table 1. The total radiation dose of atomic oxygen (AO) is 2.3×10 21 atom / cm 2 Irradiation experiments showed that a protective layer of silica was formed on the surface of the POSS-modified coating, and the tribological prope...

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Abstract

The invention discloses a long-acting solid lubricating protective coating, which uses polyamide-imide resin as an adhesive, polyhedral oligomeric silsesquioxane as a modifier, and polytetrafluoroethylene as a lubricant. N,N ‑Dimethylformamide is used as a diluent, and it is uniformly prepared by high-speed stirring or ball milling. The coating material of the present invention, on the basis of ensuring its own lubrication and protection performance, greatly improves the space environment radiation resistance and friction and wear performance of the lubrication coating material through POSS composite modified PAI resin, and can effectively prolong the service life of related equipment. Service life in the space environment. Performance tests show that the coating prepared with this coating has good adhesion to metal substrates, and has good flexibility and impact resistance. Under long-term radiation exposure, the lubricating and protective properties of the coating can still be maintained, effectively prolonging the service life of related equipment in the space environment.

Description

technical field [0001] The invention relates to a long-acting lubricating protective coating, in particular to a long-acting lubricating protective coating with excellent resistance to space environment, which is suitable for lubricating protection of parts in space environment and belongs to the technical field of lubricating protection. Background technique [0002] Since the middle of last century, organic bonded solid lubricating coating has been one of the effective ways to solve space lubrication and protection of aerospace parts, and because of its low friction coefficient, long service life and wide operating temperature range, Make it more and more widely used in the space field. However, in recent years, with the frequent development of space activities, the rapid development of aerospace equipment, and at the same time meet the needs of high reliability and long life (extended from 3 to 5 years to 8 to 10 years), related parts are also in urgent need of solutions ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D127/18C09D183/08C09D183/07C09D7/65
CPCC08L2205/025C08L2205/03C08L2205/035C09D127/18C09D179/08C09D7/65C08L27/18C08L83/04C08L83/08C08L79/08
Inventor 陈磊俞传永李红轩吉利周惠娣陈建敏
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI