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Polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication and preparation method thereof

A nano-composite material and polyphenylene sulfide technology are applied in the field of polyphenylene sulfide-based self-lubricating nano-composite materials and their preparation, which can solve the problems of low toughness and unsuitability of pure PPS, and achieve improved mechanical properties and improved bonding. , the effect of reducing the coefficient of friction

Active Publication Date: 2017-08-04
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

However, pure PPS has low toughness and is not suitable for use as a self-lubricating material alone

Method used

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  • Polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication and preparation method thereof
  • Polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication and preparation method thereof
  • Polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication has a composition volume percentage of: polyphenylene sulfide resin 79%, carbon fiber 10%, graphite 8%, and aluminum nitride nanoparticles 3%. First, the four materials are fully mechanically mixed, and then the mixed powder is placed in a twin-screw extruder to melt, mix and extrude. The melt-extruded pellets are injected into an injection molding machine. The heating temperature of the first zone of the twin-screw extruder is 320~325°C, the heating temperature of the second zone is 330~335°C, the heating temperature of the third zone is 340~345°C, the heating temperature of the fourth zone is 350~355°C, and the screw speed is 100 rpm. The injection mold temperature of the injection molding machine is 150 °C, the injection barrel temperature is 340 °C, the injection back pressure is 2 MPa, and the injection pressure is 160 MPa.

Embodiment 2

[0023] A polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication has a composition volume percentage of: polyphenylene sulfide resin 65%, carbon fiber 15%, graphite 15%, and aluminum nitride nanoparticles 5%. First, the four materials are fully mechanically mixed, and then the mixed powder is placed in a twin-screw extruder to melt, mix and extrude. The melt-extruded pellets are injected into an injection molding machine. The heating temperature of the first zone of the twin-screw extruder is 320~325°C, the heating temperature of the second zone is 330~335°C, the heating temperature of the third zone is 340~345°C, the heating temperature of the fourth zone is 350~355°C, and the screw speed is 150 rpm. The injection mold temperature of the injection molding machine is 160 °C, the injection barrel temperature is 340 °C, the injection back pressure is 3 MPa, and the injection pressure is 170 MPa.

Embodiment 3

[0025] A polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication has a composition volume percentage of: polyphenylene sulfide resin 84%, carbon fiber 10%, graphite 5%, and aluminum nitride nanoparticles 1%. First, the four materials are fully mechanically mixed, and then the mixed powder is placed in a twin-screw extruder to melt, mix and extrude. The melt-extruded pellets are injected into an injection molding machine. The heating temperature of the first zone of the twin-screw extruder is 320~325°C, the heating temperature of the second zone is 330~335°C, the heating temperature of the third zone is 340~345°C, the heating temperature of the fourth zone is 350~355°C, and the screw speed is 200 rpm. The injection mold temperature of the injection molding machine is 160 °C, the injection barrel temperature is 335 °C, the injection back pressure is 2 MPa, and the injection pressure is 150 MPa.

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Abstract

The invention discloses a polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication. The composite material is prepared from the following components by volume fractions: 47-89.5% of polyphenylene sulfide resin, 5-25% of reinforced fiber, 5-20% of a solid lubricant and 0.5-8% of aluminum nitride nanoparticles. The invention further discloses a preparation method of the composite material. Through addition of the aluminum nitride nanoparticles under the diesel lubrication condition, friction chemical reaction of a friction interface is promoted, formation of a high-performance transfer film on a paired surface is facilitated, the polyphenylene sulfide composite material more quickly reaches a stabilization stage in the friction process and the friction coefficient and the wear rate of the polyphenylene sulfide material are significantly reduced.

Description

technical field [0001] The invention relates to a polyphenylene sulfide-based self-lubricating nanocomposite material suitable for diesel lubrication and a preparation method thereof, belonging to the field of polymer self-lubricating composite materials. The composite material can be applied to sliding friction parts of moving mechanisms such as engine fuel pumps. Background technique [0002] With the rapid development of modern industry, the working environment of the kinematic mechanisms of many mechanical systems has become more and more harsh. The repeated start and stop of machinery leads to the frequent occurrence of mixed lubrication and even boundary lubrication states in these kinematic mechanisms. Especially for some moving mechanisms that cannot use external lubrication devices, but can only be lubricated by fuel itself, such as the sliding friction pair of the engine fuel pump, the wear of materials and even the occlusion of the friction pair have an important ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08K7/06C08K3/04C08K3/28B29C47/92B29C45/77B29C45/78B29C48/92
Inventor 张嘎张鼎赵福燕王齐华王廷梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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