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Polytetrafluoroethylene friction material as well as preparation method and application thereof

A technology of polytetrafluoroethylene and friction materials, which is applied in the field of friction materials, can solve the problems of poor start-stop improvement and single function of ultrasonic motors

Active Publication Date: 2020-06-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional fillers for improving friction materials, such as carbon fiber, aramid fiber, silica lime, etc., have single functions and are not effective in improving the start-stop performance of ultrasonic motors.

Method used

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  • Polytetrafluoroethylene friction material as well as preparation method and application thereof
  • Polytetrafluoroethylene friction material as well as preparation method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0028] The present invention provides a method for preparing the polytetrafluoroethylene friction material described in the above scheme, which includes the following steps: mixing various preparation raw materials, sequentially pressing and sintering the obtained mixture to obtain the polytetrafluoroethylene friction material.

[0029] In the present invention, various preparation raw materials are mixed to obtain a mixture. In the present invention, the mixing process is preferably: dispersing each preparation raw material into ethanol or acetone, and obtaining the mixture after drying. The present invention has no special requirements on the dispersion method, and any method that can disperse evenly is acceptable, such as ball milling, ultrasonic dispersion, and the like. In the present invention, there is no special requirement on the amount of ethanol or acetone, as long as the preparation raw materials can be mixed evenly. In the present invention, the drying temperatur...

Embodiment 1

[0035]Weigh 80g of polytetrafluoroethylene, 2g of nano-boron nitride, 10g of molybdenum disulfide, 3g of nano-zirconia, 4g of carbon quantum dots, and sheet nano-Ti 3 C 2 1g, mixed evenly in anhydrous ethanol, after drying, put the mixed powder into the mold, under the pressure of 70MPa, press for 3min, put it into the sintering furnace for sintering after demoulding, gradually increase the temperature from room temperature to 365°C, and Keep the temperature at 365° C. for 90 minutes, and cool down freely after sintering to obtain a polytetrafluoroethylene friction material.

Embodiment 2

[0037] Weigh 75g of polytetrafluoroethylene, 5g of nano-boron nitride, 10g of molybdenum disulfide, 5g of nano-zirconia, 3g of carbon quantum dots, and lamella nano-Ti 3 C 2 2g, mixed evenly in absolute ethanol, after drying, put the mixed powder into the mold, press it for 5min under the pressure of 100MPa, put it into the sintering furnace for sintering after demoulding, gradually raise the temperature from room temperature to 375°C, and Keep the temperature at 375° C. for 150 minutes, and cool down freely after sintering to obtain a polytetrafluoroethylene friction material.

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Abstract

The invention provides a polytetrafluoroethylene friction material as well as a preparation method and application thereof, and relates to the technical field of friction materials. The polytetrafluoroethylene friction material is prepared from the following preparation raw materials in parts by mass: 65-80 parts of polytetrafluoroethylene, 1-5 parts of nano boron nitride, 5-15 parts of molybdenumdisulfide, 1-5 parts of nano zirconium oxide, 1-5 parts of carbon quantum dots and 1-5 parts of lamellar nano Ti3C2. According to the invention, the lamellar nano Ti3C2 is added, the unique two-dimensional lamellar structure of the lamellar nano Ti3C2 enables the lamellar nano Ti3C2 to have excellent tribological characteristics, and the obtained polytetrafluoroethylene friction material can significantly improve the start-stop characteristics of a large-scale ultrasonic motor in cooperation with other components.

Description

technical field [0001] The invention relates to the technical field of friction materials, in particular to a polytetrafluoroethylene friction material and its preparation method and application. Background technique [0002] Ultrasonic motor is a new type of precision-driven micro-motor. Through energy conversion and motion transmission, it exerts force or torque on the load to achieve the purpose of controlling the precise motion / positioning of the load. As a precision driving component, ultrasonic motors are widely used in aerospace, weaponry and robots, etc. to promote the development of equipment in the direction of high precision, high efficiency, high reliability, intelligence and lightweight. Its influence on national science and technology and national defense deterrence power has a significant impact. [0003] A large number of researchers have found that the ultrasonic motor will not start normally when it is used, especially after a period of time, this problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08K13/04C08K7/00C08K3/38C08K3/30C08K3/22C08K3/04
CPCC08K3/04C08K3/22C08K3/30C08K3/38C08K7/00C08K13/04C08K2003/2244C08K2003/385C08K2201/011C08L27/18
Inventor 王齐华李宋张新瑞王廷梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI