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A kind of preparation method of composite modified polytetrafluoroethylene coating

A polytetrafluoroethylene, compound modification technology, applied in the direction of coating, etc., can solve the problems of poor interface bonding performance, and achieve the problems of easy wear, good wear resistance and high hardness, excellent lubricity and wear resistance Effect

Active Publication Date: 2022-02-15
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Filling modification is the simplest and most effective method of PTFE coating modification, which is to introduce some modified materials (such as graphene, carbon fiber, etc.) into the PTFE coating, but materials such as carbon fiber and PTFE The poor interfacial bonding performance of ethylene makes the prepared composite materials have great limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) get polytetrafluoroethylene emulsion, biomass carbon fiber, inorganic fullerene mass ratio is 8:1.5:0.5, get the silane coupling agent that accounts for biomass carbon fiber and inorganic fullerene gross mass 1%, after mixing, Ultrasonic dissolution and dispersion was carried out for 60 minutes to obtain a composite coating. Biomass carbon fiber bagasse carbon fiber, inorganic fullerene is 40nm inorganic fullerene particles.

[0035] (2) Use a smooth aluminum plate of 50cm×30cm×3mm as the substrate for spraying, clean the surface with carbon tetrachloride, and heat at 300°C for 20min.

[0036] (3) Apply the paint in the above step (1) evenly on the substrate pretreated in step (2). Place the sprayed substrate and coating in a drying oven and dry at 80°C for about 30 minutes.

[0037] (4) Place the substrate and coating obtained in the above step (3) in a muffle furnace, heat to about 350°C for curing, the heating rate is 8°C / min, keep warm for 30 minutes, and then...

Embodiment 2

[0039] (1) getting polytetrafluoroethylene emulsion, biomass carbon fiber, inorganic fullerene mass ratio is 8:1:1, gets the silane coupling agent accounting for biomass carbon fiber and inorganic fullerene gross mass 1%, after mixing, Perform ultrasonic dissolution and dispersion for 80 minutes to obtain a composite coating. Biomass carbon fiber bagasse carbon fiber, inorganic fullerene is inorganic fullerene aluminum matrix composite material.

[0040] (2) Use a smooth aluminum plate of 50cm×30cm×3mm as the substrate for spraying, clean the surface with carbon tetrachloride, and heat at 300°C for 20min.

[0041] (3) Apply the paint in the above step (1) evenly on the substrate pretreated in step (2). Place the sprayed substrate and coating in a drying oven and dry at 90°C for about 30 minutes.

[0042] (4) Place the substrate and coating obtained in the above step (3) in a muffle furnace, heat to about 350°C for curing, the heating rate is 8°C / min, keep warm for 30 minutes...

Embodiment 3

[0044] (1) get polytetrafluoroethylene emulsion, biomass carbon fiber, inorganic fullerene mass ratio is 8:1.2:0.8, get the silane coupling agent accounting for biomass carbon fiber and inorganic fullerene gross mass 1%, after mixing, Ultrasonic dissolution and dispersion was carried out for 70 minutes to obtain a composite coating. The biomass carbon fiber is bagasse carbon fiber, and the inorganic fullerene is an inorganic fullerene resin-based composite material.

[0045] (2) Use a smooth aluminum plate of 50cm×30cm×3mm as the substrate for spraying, clean the surface with carbon tetrachloride, and heat at 300°C for 20min.

[0046] (3) Apply the paint in the above step (1) evenly on the substrate pretreated in step (2). Place the sprayed substrate and coating in a drying oven and dry at 80°C for about 30 minutes.

[0047](4) Place the substrate and coating obtained in the above step (3) in a muffle furnace, heat to about 350°C for curing, the heating rate is 8°C / min, keep...

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Abstract

The invention discloses a preparation method of a composite modified polytetrafluoroethylene coating, belonging to the technical field of polytetrafluoroethylene coating. The invention is expected to solve the problem of easy wear of polytetrafluoroethylene coating by adding inorganic fullerene and carbon fiber. shortcoming. After mixing polytetrafluoroethylene emulsion, biomass carbon fiber, inorganic fullerene, and silane coupling agent, ultrasonic dissolving and dispersing is carried out. A smooth aluminum plate was used as the spray substrate, and the surface was cleaned with carbon tetrachloride and heated at 300°C. Spread the paint evenly over the pretreated substrate. The sprayed substrate and coating were placed in a drying oven and dried at 80°C. The substrate and coating were placed in a muffle furnace, cured and allowed to cool to room temperature with the furnace. The inorganic fullerene / biomass carbon fiber composite modified polytetrafluoroethylene coating prepared by the invention has excellent lubricity and wear resistance, and can be widely used in the field of mechanical lubrication.

Description

technical field [0001] The invention relates to the technical field of polytetrafluoroethylene coatings, in particular to a preparation method of a composite modified polytetrafluoroethylene coating. Background technique [0002] Bearing is an extremely important part of industrial equipment at present. Because the key equipment of some enterprises operates under extremely harsh working conditions, heavy equipment weight, high service temperature, large dust and corrosive media will cause many problems for bearing lubrication. At present, many bearings still use traditional lubricating oil and grease, but they often cannot meet the work requirements, and are prone to bite and bite of bearings and other friction pairs. Polytetrafluoroethylene (abbreviated as PEFT) has excellent lubricating properties, but it is easy to wear, so it is very important to develop polytetrafluoroethylene with excellent lubricating properties and wear resistance. The present invention proposes a co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/18C09D7/61C09D7/65
CPCC09D127/18C09D7/61C09D7/65C09D7/70C08K2201/011C08K2003/0812C08K2201/003C08K7/06C08K3/045C08L63/00
Inventor 王南南朱艳秋满泉言陈丁
Owner GUANGXI UNIV