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Modified polytetrafluoroethylene and its preparation method and modified polytetrafluoroethylene parts

A polytetrafluoroethylene, modified technology, applied in the field of modified polytetrafluoroethylene materials, can solve the problem of graphene being difficult to disperse evenly, and achieve the effect of not easy to reunite, strong attraction, uniform and stable existence

Active Publication Date: 2020-07-14
北京石墨烯技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on this, it is necessary to provide a modified polytetrafluoroethylene and its preparation method and modified polytetrafluoroethylene parts for the problem that graphene is difficult to uniformly disperse in polytetrafluoroethylene

Method used

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  • Modified polytetrafluoroethylene and its preparation method and modified polytetrafluoroethylene parts
  • Modified polytetrafluoroethylene and its preparation method and modified polytetrafluoroethylene parts
  • Modified polytetrafluoroethylene and its preparation method and modified polytetrafluoroethylene parts

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preparation example Construction

[0025] The embodiment of the present invention provides a kind of preparation method of modified polytetrafluoroethylene, comprises the following steps:

[0026] The modified polytetrafluoroethylene in which the surface of the polytetrafluoroethylene microsphere is chemically bonded to the graphene oxide sheet is obtained by carrying out amide reaction between polytetrafluoroethylene microspheres modified with amino groups on the surface and graphene oxide sheets modified by acid chloride.

[0027] In the modified polytetrafluoroethylene and its preparation method provided by the embodiments of the present invention, by modifying the amino group on the surface of polytetrafluoroethylene, modifying the acid chloride group on the graphene oxide sheet, using the amide reaction of the amino group and the acid chloride group to make the polytetrafluoroethylene Ethylene and graphene oxide sheets are combined by chemical bonds to obtain modified polytetrafluoroethylene. Through the a...

Embodiment 1

[0051] (1) Pretreatment of PTFE microspheres

[0052] Select PTFE micropowder as polytetrafluoroethylene microspheres, and place them in an environment of 23-25°C for 24-28 hours.

[0053] (2) Preparation of modified polytetrafluoroethylene

[0054] Place the pretreated 1g of polytetrafluoroethylene microspheres in 100ml of glucose solution with a concentration of 0.15mol / L and mechanically stir at a stirring speed of 150r / min. Transfer the uniformly stirred solution to a 200mL hydrothermal reaction kettle. Hydrothermal carbonization reaction at 160°C for 10 hours. The product after the hydrothermal reaction was rinsed with deionized water, placed in an oven, and dried at 80° C. for 12 hours to obtain hydroxylated polytetrafluoroethylene.

[0055] 10g 3-aminopropyltriethoxysilane is added in 120ml ethanol to obtain mass fraction and is the 3-aminopropyltriethoxysilane ethanol solution of 10wt%, then to 3-aminopropyltriethoxysilane ethanol solution Add 1g of hydroxylated pol...

Embodiment 2

[0063] The preparation method is basically the same as in Example 1, the difference is that the final product obtained in step (2) is not spray-dried, but the final product is placed in an oven and dried at 60°C to obtain modified polytetrafluoroethylene Vinyl powder. Then, the modified polytetrafluoroethylene part was prepared according to the preparation method of the modified polytetrafluoroethylene part in step (4) of Example 1.

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Abstract

The invention relates to a preparation method of modified polytetrafluoroethylene. The preparation method of the modified polytetrafluoroethylene includes the following steps that polytetrafluoroethylene microspheres are provided, and modifying amino on the surfaces of polytetrafluoroethylene microsphere particles is carried out, and aminoized polytetrafluoroethylene microspheres are obtained; a graphene oxide sheet is provided, acylating chlorination modification of the graphene oxide sheet is carried out, an acylating chlorination graphene oxide sheet is obtained; and an amide reaction is carried out on the aminoized polytetrafluoroethylene microspheres and the acylating chlorination graphene oxide sheet, the modified polytetrafluoroethylene microspheres of the polytetrafluoroethylene microsphere surface chemical bonded graphene oxide sheet is obtained. The invention further relates to the modified polytetrafluoroethylene and a modified polytetrafluoroethylene part.

Description

technical field [0001] The invention relates to the technical field of modified polytetrafluoroethylene materials, in particular to a modified polytetrafluoroethylene, a preparation method thereof, and modified polytetrafluoroethylene parts. Background technique [0002] As a special engineering plastic, polytetrafluoroethylene (PTFE) is widely used in many fields. It has the characteristics of good acid, alkali and solvent resistance, high and low temperature resistance, and the most important thing is that compared with other materials, PTFE's It has a low coefficient of friction and can be used as a good sealing material. However, PTFE has poor wear resistance, is easy to wear, and has a short service life, which greatly restricts its wider application. Therefore, it is of great practical significance to study modified PTFE composites. As a new two-dimensional nanomaterial, graphene has many excellent properties. Based on its excellent mechanical properties and as the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/26C08F8/10C08F8/42C08F8/00
CPCC08F8/10C08F8/42C08F8/00C08F114/26
Inventor 朱巧思郭建强李炯利王旭东李岳梁佳丰
Owner 北京石墨烯技术研究院有限公司
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