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Atomic oxygen resistant molybdenum disulfide-based organic or inorganic hybrid lubricating coating and preparation method

A molybdenum disulfide, atomic oxygen-resistant technology, applied in anti-corrosion coatings, coatings, devices for coating liquids on surfaces, etc., can solve the problem of loss of lubricity, difficult to use space, low-orbit environment, and reduced wear-resistant life of coatings And other issues

Active Publication Date: 2017-11-21
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organically bonded MoS 2 Adhesives and lubricants in solid lubricating coatings are easily oxidized by atomic oxygen. Sun Xiaojun et al. found that adhesives (such as polyimide) bind solid lubricants (such as MoS 2 solid lubricating coating) under 4×10 23 atom / m 2 After the total dose of atomic oxygen is eroded, the adhesive (such as polyimide) forms volatile gas, and the solid lubricant (such as the lubricant molybdenum disulfide is transformed into molybdenum trioxide) loses lubricity, resulting in a 30% reduction in the wear life of the coating , the adhesion is significantly reduced
Due to the changes in the structure and compound form of the two main components in the lubricating coating, the performance of the lubricating coating is severely degraded, and it is difficult to be used in the space low-orbit environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An atomic oxygen disulfide-resistant molybdenum disulfide-based organic or inorganic hybrid lubricating coating is based on the total mass of the formula in the atomic oxygen disulfide-resistant molybdenum disulfide-based organic or inorganic hybrid lubricating coating, including 30% adhesive and 10% solid lubricant %, modified silica sol 40%, antioxidant modifier 7%, dispersant 0.05%, mixed solvent 12.95%. Wherein, the adhesive is a polyamide-imide resin, and the polyamide-imide solid content in the polyamide-imide resin is 18%, and the viscosity characteristic of the adhesive is measured according to the paint viscosity measurement method: at 25° C. The outflow time of Tu-4 cup is 60s. The mixed solvent is composed of xylene, 2-butanone and N,N-dimethylacetamide in a mass ratio of 1:1:3. The solid lubricant is molybdenum disulfide, and its average particle size is below 5 μm. The antioxidant modifier is antimony trioxide, and its average particle size is below 5 μm....

Embodiment 2

[0029] An atomic oxygen disulfide-resistant molybdenum disulfide-based organic or inorganic hybrid lubricating coating is based on the total mass of the formula in the atomic oxygen disulfide-resistant molybdenum disulfide-based organic or inorganic hybrid lubricating coating, including 30% adhesive and 30% solid lubricant %, modified silica sol 30%, antioxidant modifier 1%, dispersant 0.15%, mixed solvent 8.85%. Wherein, the adhesive is a polyamide-imide resin, and the polyamide-imide solid content in the polyamide-imide resin is 22%, and the viscosity characteristic of the adhesive is measured according to the paint viscosity measurement method: at 25° C. The outflow time of Tu-4 cup is 80s. The mixed solvent is composed of xylene, 2-butanone and N,N-dimethylacetamide in a mass ratio of 1:1:3. The solid lubricant is molybdenum disulfide, and its average particle size is below 5 μm. The antioxidant modifier is antimony trioxide, and its average particle size is below 5 μm. ...

Embodiment 3

[0034] An atomic oxygen disulfide-resistant molybdenum disulfide-resistant organic or inorganic hybrid lubricating coating is based on the total mass of the formula in the atomic oxygen disulfide-resistant molybdenum disulfide-based organic or inorganic hybrid lubricating coating, including 40% adhesive and 20% solid lubricant %, modified silica sol 30%, antioxidant modifier 1%, dispersant 0.1%, mixed solvent 8.9%. Wherein, the adhesive is a polyamide-imide resin, and the polyamide-imide solid content in the polyamide-imide resin is 22%, and the viscosity characteristic of the adhesive is measured according to the paint viscosity measurement method: at 25° C. The outflow time of Tu-4 cup is 80s. The mixed solvent is composed of xylene, 2-butanone and N,N-dimethylacetamide in a mass ratio of 1:1:3. The solid lubricant is molybdenum disulfide, and its average particle size is below 5 μm. The antioxidant modifier is antimony trioxide, and its average particle size is below 5 μm...

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Abstract

The invention provides an atomic oxygen disulfide-resistant molybdenum disulfide-based organic or inorganic hybrid lubricating coating and a preparation method thereof. Composed of oxidation modifier, dispersant, mixed solvent and modified silica sol. The present invention can overcome the problem that the adhesive and lubricant of MoS2 solid lubricating coating bonded by polyamide-imide for space are easily oxidized by atomic oxygen, and is especially suitable for the moving parts of aircraft in the space low-orbit environment, such as gears, screw-nuts, Surface lubrication and anti-cold welding treatment of friction pairs such as shaft-shaft sleeves and slideways.

Description

technical field [0001] The invention belongs to the technical field of lubricant preparation, and in particular relates to an atomic oxygen-resistant molybdenum disulfide-based organic or inorganic hybrid lubricating coating and a preparation method thereof. Background technique [0002] Bonded MoS with organic binders 2 Due to its excellent comprehensive properties, such as vacuum lubrication performance, load-carrying capacity, impact resistance and corrosion resistance to substrates, solid lubricating coatings, compared with brittle, poor corrosion-resistant inorganic bonded solid lubricating coatings, It can effectively solve the problems of anti-corrosion and wear-resistant protection during the orbital service period of the movable parts of the space vehicle during the ground storage stage. [0003] With the development of a new generation of space vehicles in my country, the active parts that will be in service in the space low orbit environment need to withstand the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D7/12C09D7/00C09D5/08B05D3/02
Inventor 霍丽霞周晖桑瑞鹏张凯锋苟世宁蒋钊
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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