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Black phosphorus modified polyimide composite material, and preparation method and application thereof

A technology of polyimide and composite materials, applied in chemical instruments and methods, and other chemical processes, can solve the problems of easy aggregation of nanoparticles, degradation of composite material performance, and low surface activity of carbon fibers, so as to increase wear resistance , Improve wear resistance, reduce shear and compression stress

Active Publication Date: 2019-06-14
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nanoparticles are prone to agglomeration in the matrix, and the uneven dispersion leads to a decrease in the performance of the composite material.
Carbon fibers have low surface activity and poor bonding with the matrix. Therefore, during the friction process, the fibers are easily peeled off from the matrix and become three-body abrasive particles, which intensifies wear

Method used

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  • Black phosphorus modified polyimide composite material, and preparation method and application thereof
  • Black phosphorus modified polyimide composite material, and preparation method and application thereof
  • Black phosphorus modified polyimide composite material, and preparation method and application thereof

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preparation example Construction

[0041] The present invention also provides the preparation method of the polyimide composite material modified by black phosphorus, comprising the following steps:

[0042] (a) mixing polyimide, polytetrafluoroethylene, carbon fiber, graphite, polyphenylester and black phosphorus in absolute ethanol to obtain a compound;

[0043] (b) removing the absolute ethanol in the resulting mixture to obtain a dry mixture;

[0044] (c) Pressurizing and sintering the obtained dry mixture to obtain a black phosphorus-modified polyimide composite material.

[0045] The invention mixes polyimide, polytetrafluoroethylene, carbon fiber, graphite, polyphenylester and black phosphorus in absolute ethanol to obtain a mixture. The invention mixes polyimide, polytetrafluoroethylene, carbon fiber, graphite, polyphenylester and black phosphorus in absolute ethanol, and can mix the materials of each object very uniformly. In a specific embodiment of the present invention, the ratio of the mass of ca...

Embodiment 1

[0051] Seal 10g of red phosphorus, 2g of tin, and 1g of tin iodide in a quartz ampoule, vacuum (10 -1 Pa) in a tube furnace at 1°C·min -1 Heating to 700°C and keeping the temperature constant for 6h, then at 0.2°C·min -1 Lower the temperature to 450°C, keep it warm for 1 hour and then lower it to room temperature within 3 hours, and separate the target product from the residual mineralizer by refluxing toluene to obtain crude black phosphorus. Using 300mL of absolute ethanol as the liquid-phase stripping medium, liquid-phase stripped the crude black phosphorus, ultrasonic power 500W, time 30min, after centrifugation, take the supernatant, centrifuge, and dry to obtain black phosphorus.

[0052] Weigh 74.5g of polyimide, 5g of polytetrafluoroethylene, 5g of carbon fiber, 5g of flake graphite, 10g of polyphenylene, and 0.5g of nano-black phosphorus, mix them evenly in 300mL of absolute ethanol, and dry the mixed powder Put it into the mold, gradually raise the temperature from...

Embodiment 2

[0055] Seal 40g red phosphorus, 4g tin, and 1g tin iodide in a quartz ampoule, vacuum (10 -1 Pa) in a tube furnace at 2°C·min -1 Heating to 600°C and keeping the temperature constant for 7h, then at 0.5°C·min -1 Lower the temperature to 500°C, keep it warm for 2 hours and then lower it to room temperature within 5 hours, and separate the target product from the residual mineralizer by refluxing toluene to obtain crude black phosphorus. Using 400mL of absolute ethanol as the liquid-phase stripping medium, liquid-phase stripping the crude black phosphorus, ultrasonic power 600W, time 50min, after centrifugation, take the supernatant, centrifuge, and dry to obtain black phosphorus.

[0056] Weigh 64g of polyimide, 10g of polytetrafluoroethylene, 5g of carbon fiber, 10g of flake graphite, 10g of polyphenylene, and 1g of nano black phosphorus, mix them evenly in 400mL of absolute ethanol, and put the mixed powder into The mold was gradually heated from room temperature to 375°C u...

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Abstract

The invention relates to the technical field of composite materials, and provides a black phosphorus modified polyimide composite material, a preparation method thereof, and an application of the black phosphorus modified polyimide composite material as a friction material. The black phosphorus modified polyimide composite material comprises, by mass, 50-80 parts of polyimide, 5-15 parts of polytetrafluoroethylene, 5-20 parts of carbon fibers, 5-15 parts of graphite, 5-10 parts of polyphenyl ester and 0.5-2 parts of black phosphorus. Results of embodiments in the invention show that the hardness (Shore D) of the black phosphorus modified polyimide composite material obtained in the invention is equal to or more than 85, the wear extent is equal to or less than 0.001 g / h, the elastic modulus is equal to or more than 9.5 GPa, the glass transition temperature is equal to or more than 260 DEG C, and the composite material has excellent performances.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a black phosphorus-modified polyimide composite material and a preparation method and application thereof. Background technique [0002] The ultrasonic motor is a new type of friction-driven motor. It is different from the traditional electromagnetic motor in its working principle. The ultrasonic motor undergoes two energy conversions, using the inverse piezoelectric effect of piezoelectric ceramics and the friction between the stator and rotor to realize the rotation of the rotor. Rotary or linear motion, output power, drive load. [0003] Ultrasonic motor is a multidisciplinary interdisciplinary technology integrating ultrasonics, vibrations, materials, tribology, electronics and control science. Ultrasonic motor manufacturing technology is developed with the development of the above disciplines, and is gradually improved with the emergence of various new structure...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08L27/18C08L67/04C08K7/06C08K3/04C08K7/00C09K3/14
Inventor 王齐华李宋张新瑞王廷梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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