CN109054625A - A kind of air-bearing compound polyimide film and preparation method thereof - Google Patents
A kind of air-bearing compound polyimide film and preparation method thereof Download PDFInfo
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- CN109054625A CN109054625A CN201810801050.8A CN201810801050A CN109054625A CN 109054625 A CN109054625 A CN 109054625A CN 201810801050 A CN201810801050 A CN 201810801050A CN 109054625 A CN109054625 A CN 109054625A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2234—Oxides; Hydroxides of metals of lead
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Lubricants (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of air-bearing compound polyimide film, which is made of component A and mixed organic solvents；The composition of component A and shared parts by weight are polyamic acid resin 40 ~ 65, polytetrafluoroethylene (PTFE) 25 ~ 35, rare earth fluoride 1 ~ 3, lead oxide 0.5 ~ 2, boron nitride 0.5 ~ 1, zirconium oxide 0.5 ~ 1, surfactant 0.01 ~ 1；The additional amount of mixed organic solvents is 1 ~ 1.5 times of component A weight.The invention also discloses the preparation methods of the film.Film of the present invention has the performances such as the friction durability of high hardness, low coefficient of friction and length.
Description
Technical field
The invention belongs to field of material technology, it is related to a kind of air-bearing compound polyimide film and its preparation side
Method.
Background technique
The essential characteristic of polyimides is it with high temperature tolerance, anticorrosive, radiation hardness, water resistance etc., is had good
Resistance to environmental characteristics.Studies have shown that polyimide material has very high mechanical strength and chemical stability, it can adapt to various harshnesses
Environment in requirement for material property.The theory of mechanics of polyimides and its composite material, technology of preparing, structure in recent years
The gradual perfections such as analysis means and progress, have been widely used.Wherein Thermocurable polyimide is in heavy industrys such as aviation, naval vessels
Industry field has important application.And thermoplastic polyimide then has impact resistance more outstanding, endurance, anti-aging property
It gets growing concern for.
Gas bearing is a kind of sliding bearing using gas as lubricant.Also referred to as static-pressure air bearing.It is with
The development of the emerging science and technology such as atomic energy, space technology, microelectronics, information technology and bioengineering get up one
Door new technology.Compared with traditional rolling bearing or film lubrication bearing, gas lubrication technology by feat of high revolving speed, it is pollution-free and
No temperature is gradually approved with a kind of energy-efficient lubrication strategies by numerous dealers using superiority such as limitations.Static pressure at present
Air-bearing generallys use straddle mounted type combined support technology to meet application demand, but there is such as gas supply to adjust for the support technology
Complexity, a series of intrinsic problems such as structure is not compact restrict the using effect of the support technology.In precision machinery, Mou Xiezhuan
Subassembly needs high movement velocity, and needs busy shift, and this requires the cooperation between stator rotor is very accurate.This
A little factors determine that rotor engagement face is needed using certain lubrication means, and are partial at present using filmlubrication, mixing profit
The modes such as sliding and injection lubrication.
Summary of the invention
The purpose of the present invention is to provide a kind of air-bearing compound polyimide films and preparation method thereof.
The use of air-bearing compound polyimide film of the present invention can well solve air-bearing air-flow
Friction and collision between axis and axle journal caused by unstability.In bearing operation, the presence of compound polyimide film makes
It obtains dual face in friction process and forms the uniform preferable transfer membrane of cohesive force, play the role of antifriction antiwear, reach protection
The effect to rub between air-bearing axis and axle journal with collision.
Film of the present invention by binder, solid lubricant, anticorrosive additive, anti-wear additive, surfactant with
And decentralized medium composition；Binder selects polyamic acid resin；Solid lubricant is polytetrafluoroethylene (PTFE)；Rare earth fluoride adds for anti-corrosion
Add agent；Lead oxide, boron nitride and zirconium oxide are anti-wear additive；Cetyl trimethylammonium bromide, fluorocarbon surfactant
One or more are surfactant；Decentralized medium selects mixed organic solvents.
A kind of air-bearing compound polyimide film, it is characterised in that the film is by component A and mixed organic solvents
Composition；The composition of the component A and shared parts by weight are polyamic acid resin 40 ~ 65, polytetrafluoroethylene (PTFE) 25 ~ 35, fluorination
Rare earth 1 ~ 3, lead oxide 0.5 ~ 2, boron nitride 0.5 ~ 1, zirconium oxide 0.5 ~ 1, surfactant 0.01 ~ 1；Mixed organic solvents add
Enter 1 ~ 1.5 times that amount is component A weight.
The structural formula of the polyamic acid resin are as follows:
Wherein R represents methylene, the integer that n is 20 to 30.
The purity of the polytetrafluoroethylene (PTFE) is greater than 98%, and granularity is at 5 microns or less.
The rare earth fluoride is one or more of lanthanum fluoride, cerium fluoride, and granularity is less than 5 microns.
The lead oxide, boron nitride, zirconium oxide granularity be respectively less than 5 microns.
The surfactant is one or both of cetyl trimethylammonium bromide, fluorocarbon surfactant.
The mixed organic solvents be one of N,N-dimethylformamide, DMAC N,N' dimethyl acetamide, dimethylbenzene or
It is several.
The film with a thickness of 20-50 microns.
The preparation method of air-bearing compound polyimide film, it is characterised in that specific steps are as follows:
1) polyamic acid resin, polytetrafluoroethylene (PTFE), mixed organic solvents are ground, adds rare earth fluoride, lead oxide, nitridation
Boron, zirconium oxide, surfactant, mixed organic solvents are uniformly mixed, and coating is obtained after ball milling；
2) with spray gun when pressure is 0.1-0.3Mpa by prepared coating in compressed air (oil-free, anhydrous) or compressed nitrogen
Under be sprayed on surface treated piece surface；After the part sprayed is placed at room temperature for 5-30 minutes in clean air, place into
It is oven for curing；The condition of cure are as follows: 100 DEG C ± 30 DEG C constant temperature 30-90 minutes, 200 DEG C ± 30 DEG C constant temperature 30-90 minutes,
300 DEG C ± 30 DEG C constant temperature 150-200 minutes, cool to room temperature with the furnace；The temperature of part is 50 DEG C -70 DEG C when spraying.
Piece surface needs the surface treatment such as preparatory sandblasting, oil removing, derusting, phosphatization.
The binder that the present invention selects is heat resistant polyamide acid resin, and wearability, heat resistance are fully guaranteed；Choosing
Lubricant is polytetrafluoroethylene (PTFE), has preferable matching with resin matrix and to the stability of irradiation, improves painting
The antiwear and friction reduction property of layer；The anticorrosive additive of selection is rare earth fluoride, chemical reaction and physics can occur with piece surface
Reaction, improves the binding force of coating and piece surface, while being adsorbed on lubricant, improves the corrosion resistance of coating；Choosing
Mixed organic solvents can be such that polyamic acid resin is sufficiently dissolved into solvent.
The main performance index of Kapton of the present invention such as following table.
Film of the present invention has the performances such as the friction durability of high hardness, low coefficient of friction and length.
Specific embodiment
Embodiment 1:
Polyamic acid resin 100g, polytetrafluoroethylene (PTFE) 27g are weighed, 100g mixed organic solvents are added, through cone mill grinding distribution
After pour into ball grinder, add cerium fluoride 1.5g, lead oxide 0.9g, boron nitride 0.8g, zirconium oxide 0.5g, fluoro-carbon surface active
Agent 0.6g, mixed organic solvents 80g carry out ball milling for 24 hours, obtain finely dispersed compo [mixed organic solvents: N, N- bis-
Methylformamide 30%, DMAC N,N' dimethyl acetamide 70%(volume basis composition)].To carry out spray film workpiece at 60 DEG C
30min is set in the decentralization of temperature condition, and the coating prepared is sprayed on workpiece surface in the case where gas pressure is 0. 2MPa with spray gun,
The workpiece sprayed is placed into 15min at room temperature.It is then placed in baking oven and solidifies, condition of cure are as follows: 100 DEG C, constant temperature 60 divides
Clock, 200 DEG C, constant temperature 60 minutes, 300 DEG C constant temperature 180 minutes, workpiece cooled to room temperature in an oven.
Embodiment 2:
Polyamic acid resin 100g, polytetrafluoroethylene (PTFE) 26g are weighed, 100g mixed organic solvents are added, through cone mill grinding distribution
After pour into ball grinder, add lanthanum fluoride 1.4g, lead oxide 0.8g, boron nitride 0.8g, zirconium oxide 0.5g, fluoro-carbon surface active
Agent 0.6g, be added 80g mixed organic solvents, carry out ball milling for 24 hours, obtain finely dispersed compo [mixed organic solvents: N,
Dinethylformamide 40%, DMAC N,N' dimethyl acetamide 60%(volume basis composition)].To carry out spray film workpiece 60
DEG C the decentralization of temperature condition set 30min, the coating prepared is sprayed on workpiece table in the case where gas pressure is 0. 2MPa with spray gun
The workpiece sprayed is placed 15min by face at room temperature.It is then placed in baking oven and solidifies, condition of cure are as follows: 100 DEG C, constant temperature 60
Minute, 200 DEG C, constant temperature 60 minutes, 300 DEG C constant temperature 180 minutes, workpiece cooled to room temperature in an oven.
Embodiment 3:
Polyamic acid resin 100g, polytetrafluoroethylene (PTFE) 26g are weighed, 100g mixed organic solvents are added, through cone mill grinding distribution
After pour into ball grinder, add cerium fluoride 0.8g, lanthanum fluoride 0.7g, lead oxide 0.8g, boron nitride 0.7g, zirconium oxide 0.5g,
Fluorocarbon surfactant 0.4g, cetyl trimethylammonium bromide 0.3g carry out ball milling for 24 hours, obtain finely dispersed mixing and apply
Expect [mixed organic solvents: N,N-dimethylformamide 20%, DMAC N,N' dimethyl acetamide 60%, dimethylbenzene 20%(volume basis group
At)].To carry out spray film workpiece 60 DEG C temperature condition decentralization set 30min, with spray gun gas pressure be 0. 2MPa
The lower coating that will be prepared is sprayed on workpiece surface, and the workpiece sprayed is placed 15min at room temperature.It is then placed in baking oven
Solidification, condition of cure are as follows: 100 DEG C, constant temperature 60 minutes, 200 DEG C, constant temperature 60 minutes, 300 DEG C constant temperature 180 minutes, workpiece is in baking oven
Middle cooled to room temperature.
Claims (9)
1. a kind of air-bearing compound polyimide film, it is characterised in that the film is by component A and mixed organic solvents group
At；The composition of the component A and shared parts by weight are that polyamic acid resin 40 ~ 65, polytetrafluoroethylene (PTFE) 25 ~ 35, fluorination are dilute
Native 1 ~ 3, lead oxide 0.5 ~ 2, boron nitride 0.5 ~ 1, zirconium oxide 0.5 ~ 1, surfactant 0.01 ~ 1；The addition of mixed organic solvents
Amount is 1 ~ 1.5 times of component A weight.
2. film as described in claim 1, it is characterised in that the structural formula of the polyamic acid resin are as follows:
Wherein R represents methylene, the integer that n is 20 to 30.
3. film as described in claim 1, it is characterised in that the purity of the polytetrafluoroethylene (PTFE) is greater than 98%, and granularity is at 5 microns
Below；The lead oxide, boron nitride, zirconium oxide granularity be respectively less than 5 microns.
4. film as described in claim 1, it is characterised in that the rare earth fluoride is one of lanthanum fluoride, cerium fluoride or several
Kind, granularity is less than 5 microns.
5. film as described in claim 1, it is characterised in that the surfactant is cetyl trimethylammonium bromide, fluorine
One or both of carbon surface active agent.
6. film as described in claim 1, it is characterised in that the mixed organic solvents are n,N-Dimethylformamide, N, N-
One or more of dimethyl acetamide, dimethylbenzene.
7. film as described in claim 1, it is characterised in that the film with a thickness of 20-50 microns.
8. the preparation method of air-bearing compound polyimide film, feature exist as described in any one of claims 1 to 7
In specific steps are as follows:
1) polyamic acid resin, polytetrafluoroethylene (PTFE), mixed organic solvents are ground, adds rare earth fluoride, lead oxide, nitridation
Boron, zirconium oxide, surfactant, mixed organic solvents are uniformly mixed, and coating is obtained after ball milling；
2) prepared coating is sprayed under compressed air or compressed nitrogen when pressure is 0.1-0.3Mpa with spray gun through
The piece surface of surface treatment；After the part sprayed is placed at room temperature for 5-30 minutes in clean air, place into oven for curing；
The condition of cure are as follows: 100 DEG C ± 30 DEG C constant temperature 30-90 minutes, 200 DEG C ± 30 DEG C constant temperature 30-90 minutes, 300 DEG C ± 30 DEG C
Constant temperature 150-200 minutes, cool to room temperature with the furnace；The temperature of part is 50 DEG C -70 DEG C when spraying.
9. preparation method as claimed in claim 8, it is characterised in that the compressed air is oil-free, anhydrous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801050.8A CN109054625B (en) | 2018-07-20 | 2018-07-20 | Composite polyimide film for air bearing and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801050.8A CN109054625B (en) | 2018-07-20 | 2018-07-20 | Composite polyimide film for air bearing and preparation method thereof |
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| CN109054625A true CN109054625A (en) | 2018-12-21 |
| CN109054625B CN109054625B (en) | 2020-09-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894856A (en) * | 2019-09-29 | 2020-03-20 | 浙江中达精密部件股份有限公司 | Sliding bearing with polyimide sliding layer |
| CN112058611A (en) * | 2020-09-08 | 2020-12-11 | 中国科学院兰州化学物理研究所 | Method for processing engine shaft sleeve by adopting laser texturing |
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| CN105684560A (en) * | 2014-09-30 | 2016-06-15 | 株式会社Lg化学 | Ductile metal laminate and method of manufacturing same |
| CN106957503A (en) * | 2017-03-20 | 2017-07-18 | 燕山大学 | Polytetrafluoroethylene (PTFE)/Polyimide/Nano silica self-lubricating material and preparation method thereof |
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| US20120097194A1 (en) * | 2002-09-09 | 2012-04-26 | Reactive Surfaces, Ltd. | Polymeric Coatings Incorporating Bioactive Enzymes for Catalytic Function |
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| CN1772812A (en) * | 2005-11-17 | 2006-05-17 | 复旦大学 | Reinforced toughened antiwear composite polyimide material |
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| EP2592290A1 (en) * | 2011-11-09 | 2013-05-15 | MAHLE International GmbH | Multi-layer sliding bearing |
| CN105684560A (en) * | 2014-09-30 | 2016-06-15 | 株式会社Lg化学 | Ductile metal laminate and method of manufacturing same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894856A (en) * | 2019-09-29 | 2020-03-20 | 浙江中达精密部件股份有限公司 | Sliding bearing with polyimide sliding layer |
| CN112058611A (en) * | 2020-09-08 | 2020-12-11 | 中国科学院兰州化学物理研究所 | Method for processing engine shaft sleeve by adopting laser texturing |
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