Preparation method of molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material

A technology of polytetrafluoroethylene and composite materials, which is applied in the field of preparation of molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite materials, can solve the problem of deterioration of wear resistance and anti-friction performance of composite materials, and doping synergies Uneven dispersion of component materials, difficulty in uniform dispersion of synergistic particles, etc., to achieve the effect of improving poor thermal conductivity, low preparation cost, and simple molding process

Active Publication Date: 2019-11-05
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in recent years, researchers have mixed various nanocomposites with polytetrafluoroethylene powder, and then adopted cold pressing and heat treatment processes to produce a series of polytetrafluoroethylene-based functional wear-resistant and friction-reducing materials, which are comparable to pure polytetrafluoroethylene. Compared with ethylene materials, the tribological properties of the prepared materials are greatly improved, but it still has the defect that the synergistic particles are difficult to disperse uniformly in PTFE
[0004] At present, the conventional mechanical blending process is used to prepare polymer composite friction materials. The doped synergistic component materials are easy to disperse unevenly in the polymer, and the doped synergistic materials are easy to segregate at the friction interface during the friction process, which in turn leads to Deterioration of wear resistance and anti-friction properties

Method used

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preparation example Construction

[0043] A preparation method of molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material, which specifically comprises the following steps:

[0044] S1. Plasma treatment is performed on the polytetrafluoroethylene powder, and after irradiating for 60-120s, place it in the air and let it stand for 15-30 minutes;

[0045] S2, graphite powder is carried out pretreatment: add graphite powder in deionized water, the mass ratio of graphite powder and deionized water is less than 1:50, heats and boils and cools to room temperature after 3h, filters and collects graphite powder; The graphite powder of collection is with 10: The mass ratio of 1 is added to the nitric acid solution with a mass percentage concentration of 3%, soaked, centrifuged, and centrifugally washed with deionized water until neutral; dried and ground to obtain ultra-fine graphite powder with an average particle size of 0.5 μm ;

[0046] S3, polytetrafluoroethylene powder is s...

Embodiment 1

[0069] S1. Plasma treatment of polytetrafluoroethylene powder:

[0070] Use the HD-1A plasma processor to carry out plasma treatment on the polytetrafluoroethylene powder. The radio frequency generator of the plasma processor is 13.56MHz and the power is 500W. First, 5g of the polytetrafluoroethylene powder to be treated is evenly flattened Lay it on the stage between the two electrodes in the reaction chamber of the ion plasma processor. The distance between the two electrodes is adjusted to 15mm in advance. The two ends of the reaction chamber are respectively connected to the vacuum pump and the intake system; At about 5Pa, then air is introduced for 5 minutes at a rate of 150mL / min; after the air pressure in the reaction chamber is stabilized, the high-frequency power supply is turned on, and the polytetrafluoroethylene powder is irradiated at a voltage of 40V. 60s, so that C=C bonds are generated on the surface to facilitate the subsequent polymerization reaction; after t...

Embodiment 2

[0100] S1. Plasma treatment of polytetrafluoroethylene powder:

[0101] Use the HD-1A plasma processor to carry out plasma treatment on the polytetrafluoroethylene powder. The radio frequency generator of the plasma processor is 13.56MHz and the power is 500W. First, 5g of the polytetrafluoroethylene powder to be treated is evenly flattened Lay it on the stage between the two electrodes in the reaction chamber of the ion plasma processor. The distance between the two electrodes is adjusted to 15mm in advance. The two ends of the reaction chamber are respectively connected to the vacuum pump and the intake system; At about 5Pa, then air is introduced for 5 minutes at a rate of 150mL / min; after the air pressure in the reaction chamber is stabilized, the high-frequency power supply is turned on, and the polytetrafluoroethylene powder is irradiated at a voltage of 40V. The time is 80s, so that C=C bonds are generated on the surface, so as to facilitate the subsequent polymerizatio...

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Abstract

The invention belongs to the technical field of self-lubricating materials, and relates to a preparation method of a molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material, and the method comprises the following steps: S1, performing plasma treatment on polytetrafluoroethylene powder, and after irradiation for 60-120 seconds, putting the polytetrafluoroethylene powder for standing for 15-30 minutes in air; S2, performing pretreatment on graphite powder, S3, performing sensitization and activation treatment on the polytetrafluoroethylene powder, to be more specific, after wetting of the polytetrafluoroethylene powder treated by plasma with absolute ethanol, respectively performing sensitization and activation on the polytetrafluoroethylene powder; S4, preparing graphite-nickel phosphorus-polytetrafluoroethylene composite powder, S5, preparing graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder, and S6, preparing the molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material, to be more specific, first, molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder is prepared, and the molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material powder is molded to obtain the wear resistant andantifriction molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material.

Description

technical field [0001] The invention belongs to the technical field of self-lubricating materials, and relates to a preparation method of a molybdenum disulfide-graphite oxide-nickel phosphorus-polytetrafluoroethylene composite material. Background technique [0002] In recent years, various industries have put forward higher and higher requirements for the reliability and energy consumption of machinery and equipment. Relevant statistics show that the failure of equipment due to friction and wear between movable components is one of the main reasons affecting the reliability of equipment operation. At the same time, equipment wear also brings huge economic losses and pollutes the environment. To reduce the wear between kinematic pairs, improving the lubrication conditions is a main way, and it can also significantly improve the reliability of equipment operation. In the traditional lubrication system, lubricants are often needed to reduce the friction and wear of the movin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08K3/30C08K3/04C08K3/08C08K3/02
CPCC08K3/02C08K3/04C08K3/08C08K3/30C08K2003/026C08K2003/0862C08K2003/3009C08L27/18
Inventor 杨育林李飞宋来洲范兵利谷大鹏梁丽芬高添
Owner YANSHAN UNIV
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