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Graphene polyether-ether-ketone composite coating and preparation method thereof

A composite coating, olefin polyether technology, applied in the direction of coating, etc., can solve the problems of large amount of titanium-based whiskers, reduced coating performance, large size of modified materials, etc., to improve toughness and other mechanical properties, improve resistance Grinding and lubricity, the effect of good structure to enhance performance

Inactive Publication Date: 2015-11-25
NINGBO GRAMMY KITCHENWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polytetrafluoroethylene, polyphenylene sulfide, carbon fiber, glass fiber and other materials are often used to modify polyether ether ketone (PEEK) in order to obtain functional enhancement. However, due to the large size of the modified material, it is easy to Damage to the body material is not conducive to improving the wear resistance and lubricity of the coating itself
Chinese patent CN100398605B uses titanium-based whiskers to improve the anti-wear and anti-friction properties of polyetheretherketone composites. Although the mechanical and anti-wear properties of PEEK composites are improved by adding modified titanium-based whiskers, the titanium-based whiskers The amount used is large, resulting in difficulties in the processing of composite materials
The inorganic materials molybdenum disulfide, aluminum oxide, copper powder, silicon dioxide or stainless steel powder used in this method have poor compatibility with polyether ether ketone, so these inorganic materials cannot be well dispersed in polyether ether ketone. In etherketone coating, agglomeration is easy to occur and the coating performance will be reduced
Moreover, the process of the method is complex and the operation is difficult

Method used

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  • Graphene polyether-ether-ketone composite coating and preparation method thereof

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preparation example Construction

[0034] Correspondingly, the present invention also provides a preparation method of graphene polyether ether ketone composite coating, comprising the following steps: mixing sulfolane, 4,4'-difluorobenzophenone and hydroquinone, and then adding xylene After heating and stirring, add a condensing agent, heat up to 150-180°C for reaction, gradually raise the temperature to 240-260°C and keep it for 10-15 minutes, remove xylene, continue to heat up to 290-310°C for reaction, add graphene, and heat at 290-290°C After reacting at 310°C, a pre-material is obtained; the pre-material, surfactant and octaphenyl-POSS are mixed to obtain a graphene polyether ether ketone composite coating.

[0035] As a preferred version, the condensing agent is sodium carbonate and / or potassium carbonate. The surfactant is preferably one or more of DP-518 dispersant, DC-3AD modified polysiloxane and Z-6070 alkylsilane. Preferably, 20-25 parts by weight of 4,4'-difluorobenzophenone, 40-50 parts by weigh...

Embodiment 1

[0052] According to the proportioning of raw materials shown in Table 1, add sulfolane, 4,4'-difluorobenzophenone and hydroquinone successively in the reaction flask with water separator, then add xylene, heat and stir, After the raw materials are completely dissolved, add a condensing agent and raise the temperature to 150-180°C for reaction. After 1 hour of reaction, gradually raise the temperature to 250°C and keep it for 10-15 minutes, then remove the xylene, continue to heat up to 300°C for 2-3 hours, and then add heat conduction Graphene filler, continue to react at 300°C for 1 to 2 hours, stop the reaction, and obtain the precursor.

[0053] After the above preparation is completed, the uncooled pre-material is mixed with the surfactant, and then directly coated on the base material. After the coating, the base material is washed with water, and the solvent and inorganic salt are removed, and then placed in an oven at 180 ° C Drying at low temperature for 3-5 hours, the...

Embodiment 2～5

[0055] According to the ratio of raw materials shown in Table 1, the preparation method of Example 1 was adopted to obtain a base material coated with polyether ether ketone on the surface.

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Abstract

The invention provides a graphene polyether-ether-ketone composite coating and a preparation method thereof. The coating is prepared from the following raw materials: 4,4'-difluorobenzophenone, hydroquinone, a condensing agent, a surfactant, graphene and octaphenyl-POSS. According to the invention, graphene is directly added during the preparation process of the composite coating, so thermal conductivity of the composite coating is improved; meanwhile, the graphene itself has a good mechanical property and a good structural reinforcing property, so toughness of the composite coating is improved. The added octaphenyl-POSS in the invention is used as a nanometer functional material, has good compatibility with the polyether-ether-ketone body and the graphene, and is easy to be dissolved in an organic solvent; only a small amount of the octaphenyl-POSS is needed to be added and can facilitate dispersion of a graphene filler; meanwhile, the octaphenyl-POSS can be used as a nanometer spherical lubrication-assisting agent to improve the wear resistance and lubricating property of the coating. Moreover, compared with the prior art, the production process of the graphene polyether-ether-ketone composite coating in the invention is simple and good in operability.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a graphene polyether ether ketone composite coating and a preparation method thereof. Background technique [0002] PTFE coating has good physical and chemical stability due to the super strength of fluorocarbon bonds, but its adhesion to metal is poor, especially when it is heated at high temperature, due to the inevitable defects in the coating layer. Thermal fluctuations on the surface of the coating will intensify the detachment of the PTFE coating from the metal base, and it is very easy to fall off under the action of sharp utensils and lose its effectiveness. Moreover, during the production and use of polytetrafluoroethylene coatings, it is often necessary to add the dispersant perfluorooctanoate, which is harmful to the human body, and existing studies have shown that it has obvious carcinogenic effects. Compared with traditional polytetrafluoroethylene coatings, polyet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/16C09D7/12C08G8/02
Inventor 肖彬彭彩佑王高林
Owner NINGBO GRAMMY KITCHENWARE
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