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POSS (polyhedral oligomeric silsesquioxane)-containing polyimide resin oil abrasion-resistant high temperature-resistant solid lubricant coating material and method

A solid lubricating coating, polyimide resin technology, used in coatings, fire-retardant coatings, etc., can solve the problems of weak interfacial bonding force, undulating coating friction coefficient, large wear rate, etc., and achieve excellent friction reduction and wear resistance. performance, improved dispersibility, improved heat resistance, and improved mechanical strength

Inactive Publication Date: 2017-06-20
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN102286248A uses polytetrafluoroethylene micropowder as a solid lubricant, and the self-lubricating wear-resistant coating prepared has the characteristics of high load resistance and wear resistance, but due to the low surface free energy of polytetrafluoroethylene micropowder, the interface with the resin The bonding force is weak, and at the same time, the friction coefficient of the coating fluctuates and the wear rate increases with the accumulation of friction heat during the friction process.
The article "Polyimide bonded MoS 2 Tribological properties of solid lubricating coatings in oil medium"Abraded MoS 2 A bonded polyimide solid lubricating coating was prepared, but industrial-grade MoS 2 The particle size is in the micron level, which is easy to form stress concentration points in the coating matrix,

Method used

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  • POSS (polyhedral oligomeric silsesquioxane)-containing polyimide resin oil abrasion-resistant high temperature-resistant solid lubricant coating material and method
  • POSS (polyhedral oligomeric silsesquioxane)-containing polyimide resin oil abrasion-resistant high temperature-resistant solid lubricant coating material and method
  • POSS (polyhedral oligomeric silsesquioxane)-containing polyimide resin oil abrasion-resistant high temperature-resistant solid lubricant coating material and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of raw materials:

[0036] Preparation of polyamic acid containing POSS: In parts by mass, add 350 parts of N,N-dimethylacetamide, 5 parts of diamine type POSS and 10 parts of 4,4' to a three-necked flask equipped with a mechanical stirrer - Diaminodiphenyl ether, after stirring and dissolving under ice bath conditions, add 20 parts of pyromellitic anhydride, continue stirring in ice bath for 8 hours, and obtain brown transparent and viscous POSS-containing polyamic acid.

[0037] Ball milling method for processing molybdenum disulfide: in parts by mass, weigh 10 parts of industrial grade molybdenum disulfide and 100 parts of sodium chloride and mix them evenly, add 15 parts of agate balls, after 500 rpm one-way ball milling for 1 hour, wash with a large amount of distilled water, and Dry in a blast oven at 80°C for 8 hours. The average particle size after ball milling is less than 10μm, and it has excellent dispersion performance in organic solvents. ...

Embodiment 2

[0043] (1) Preparation of raw materials:

[0044] Preparation of polyamic acid containing POSS: In parts by mass, add 500 parts of N,N-dimethylacetamide, 10 parts of diamine type POSS and 20 parts of 4,4' to a three-necked flask equipped with a mechanical stirrer - Diaminodiphenyl ether, after stirring and dissolving under ice bath conditions, add 25 parts of pyromellitic anhydride, continue stirring in ice bath for 12 hours, and obtain brown transparent and viscous POSS-containing polyamic acid.

[0045] Ball milling method to treat molybdenum disulfide: weigh 15 parts of industrial grade molybdenum disulfide and 120 parts of sodium chloride in parts by mass, add 20 parts of agate balls, and after 1.5 hours of unidirectional ball milling at 600rpm, wash with a large amount of distilled water. Dry in a blast oven at 80°C for 8 hours. The average particle size after ball milling is less than 10μm, and it has excellent dispersion performance in organic solvents.

[0046] (2) t...

Embodiment 3

[0050] (1) Preparation of raw materials:

[0051] Preparation of polyamic acid containing POSS: In parts by mass, add 500 parts of N,N-dimethylacetamide, 10 parts of diamine type POSS and 15 parts of 4,4' to a three-necked flask equipped with a mechanical stirrer - Diaminodiphenyl ether, after stirring and dissolving under ice bath conditions, add 30 parts of pyromellitic anhydride, continue stirring in ice bath for 15 hours, and obtain brown transparent viscous polyamic acid.

[0052] Ball milling method for processing molybdenum disulfide: in parts by mass, weigh 12 parts of industrial grade molybdenum disulfide and 120 parts of sodium chloride and mix evenly, add 20 parts of agate balls, after 800 rpm one-way ball milling for 2 hours, wash with a large amount of distilled water, and Dry in a blast oven at 80°C for 8 hours. The average particle size after ball milling is less than 10μm, and it has excellent dispersion performance in organic solvents.

[0053] (2) tinplate ...

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PUM

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Abstract

The invention relates to a POSS (polyhedral oligomeric silsesquioxane)-containing polyimide resin oil abrasion-resistant high temperature-resistant solid lubricant coating material and a method. The POSS-containing polyimide resin oil abrasion-resistant high temperature-resistant solid lubricant coating material comprises POSS-containing polyamic acid, molybdenum disulfide and an organic solvent, wherein the POSS-containing polyamic acid is prepared by the polycondensation of diamine POSS, aromatic diamine and aromatic dianhydride in N,N-dimethylacetamide. The material is sprayed on the surface of a coated material, and the curing process is (5-60) minutes of curing under (60-100) DEG C, (5-60) minutes of curing under (120-180) DEG C, (5-60) minutes of curing under (200-300) DEG C and (30-120) minutes of curing under (300-400) DEG C in sequence. After curing, the material is cooled to room temperature, and thereby the polyimide-based self-lubricating compound coating is obtained. The coating disclosed by the invention has the characteristics of oil abrasion resistance, high temperature resistance, long service life and the like, and can solve the problem that bonded solid lubricant coating can easily shed and is short in service life under special conditions, such as high and low temperatures, high load and existence of chemical medium or oil, in high-tech fields including aeronautics and astronautics.

Description

technical field [0001] The invention belongs to the field of high-temperature-resistant self-lubricating protective coatings, and relates to an oil-resistant and high-temperature-resistant solid lubricating coating material containing POSS polyimide resin and a method thereof. Background technique [0002] In order to solve tribological problems such as mechanical wear, adhesion, and cold welding under special working conditions such as high and low temperature, high load, and high vacuum in aerospace and other high-tech fields, bonded solid lubricating coatings and their technologies have been widely used. [0003] Polyimide (Polyimide, referred to as PI) is a kind of ring chain polymer with imide ring as the characteristic structure. Its main chain molecular structure usually contains a five-membered ring imide structure, which contains a large number of π-π conjugated structural features, so it exhibits very excellent properties, such as: high and low temperature resistan...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D7/12C08G73/10
CPCC08G73/106C08G73/1071C08K3/30C08K7/00C08K2003/3009C08K2201/011C09D5/18C09D7/70C09D179/08
Inventor 颜红侠许培伦施勇鹏陈争艳尚高峰白利华吕青
Owner NORTHWESTERN POLYTECHNICAL UNIV
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