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Nano titanium nitride filled ultra-high-molecular-weight polyethylene composite lubricating material and preparation method thereof

An ultra-high molecular weight, nano-titanium nitride technology, applied in the field of wear-resistant materials and composite materials, can solve problems such as high friction coefficient of ultra-high molecular weight polyethylene

Active Publication Date: 2020-05-22
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

[0006] The purpose of the present invention is to provide a nano-titanium nitride filled ultra-high molecular weight polyethylene lubricating material to solve the technical problem of large friction coefficient of ultra-high molecular weight polyethylene under low load

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Raw material ratio: Accurately weigh 99g of ultra-high molecular weight polyethylene and 1g of nano-titanium nitride;

[0021] (2) Preparation process: first add nano-titanium nitride into 120ml of industrial alcohol, stir ultrasonically for 0.6 hours, then add ultra-high molecular weight polyethylene, continue ultrasonically stirring for 0.6 hours, mix well, filter and dry to obtain mixed powder Material; Pour the mixed powder into the mold and hot press molding: heat preservation and pressure at 190°C and 10MPa for 150min; naturally cool to 80°C (keep the pressure at 12Mpa during the cooling process), demould, and ultra-high molecular weight polyethylene can be obtained Composite lubricating materials;

[0022] (3) Tribological performance test: the friction coefficient is 0.15 (GB / T3960, 50N, 200rpm, 120min), which is 28.5% lower than that of pure UHMWPE (0.21).

Embodiment 2

[0024] (1) Raw material ratio: Accurately weigh 97g of ultra-high molecular weight polyethylene and 3g of nano-titanium nitride;

[0025] (2) Preparation process: first add nano-titanium nitride into 300ml of industrial alcohol, stir ultrasonically for 0.5 hours, then add ultra-high molecular weight polyethylene, continue ultrasonically stirring for 0.5 hours, mix well, filter and dry to obtain mixed powder Then pour the mixed powder into the mold for hot press molding: 195°C, heat preservation and pressure at 8MPa for 140min; then naturally cool to 75°C (keep the pressure at 10Mpa during the cooling process), and demould, you can get ultra-high molecular weight polymer Ethylene compound lubricating material;

[0026] (3) Tribological performance test: the friction coefficient is 0.12 (GB / T3960, 50N, 200rpm, 120min), which is 42.8% lower than that of pure UHMWPE (0.21).

Embodiment 3

[0028] (1) Raw material ratio: Accurately weigh 93g of ultra-high molecular weight polyethylene and 7g of nano-titanium nitride;

[0029] (2) Preparation process: first add nano-titanium nitride to 300ml of industrial alcohol, and stir ultrasonically for 0.8 hours; add ultra-high molecular weight polyethylene, continue ultrasonically stirring for 0.8 hours, mix well, filter, and dry to obtain a mixed powder ; Then pour the mixed powder into the mold for hot pressing: 200°C, heat preservation and pressure at 7MPa for 120min; then naturally cool to 70°C (keep the pressure at 15Mpa during the cooling process), and demould at room temperature to obtain ultra-high molecular weight polymer Ethylene compound lubricating material;

[0030] (3) Tribological performance test: the friction coefficient is 0.07 (GB / T3960, 50N, 200rpm, 120min), which is 66.6% lower than that of pure UHMWPE (0.21).

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Abstract

The invention provides a nano titanium nitride filled ultra-high-molecular-weight polyethylene composite lubricating material, which is prepared by the following steps: stirring and dispersing 1-10 wt% of nano titanium nitride and 90-99 wt% of ultra-high-molecular-weight polyethylene into industrial alcohol, carrying out ultrasonic uniform mixing, carrying out suction filtration, and drying to obtain mixed powder; and pouring the mixed powder into a mold, carrying out hot press molding at a certain temperature and pressure, naturally cooling to 60-80 DEG C, and demolding to obtain the ultra-high-molecular-weight polyethylene composite lubricating material. Tribological performance test results show that the friction coefficient of the ultra-high-molecular-weight polyethylene under a low load can be significantly reduced by filling the ultra-high-molecular-weight polyethylene composite material with the nano titanium nitride, and the application of the nano titanium nitride is expanded;in addition, the nano titanium nitride is small in particle size, large in specific surface area, small in filling amount, low in cost and simple in process, and a new thought is provided for designof polymer lubricating materials.

Description

technical field [0001] The invention relates to an ultra-high molecular weight polyethylene composite material, in particular to an ultra-high molecular weight polyethylene lubricating material filled with nano-titanium nitride and a preparation method thereof, belonging to the field of composite materials and the technical field of wear-resistant materials. Background technique [0002] UHMWPE has good wear resistance and impact resistance, but it has low hardness, low strength, poor creep resistance and large dimensional shrinkage, so it can be used as lubricating and sealing parts for high-end equipment pneumatic and hydraulic systems under low load It is used, but the friction coefficient is too large under low load, so it must be modified to meet the requirements of working conditions. Usually, when ultra-high molecular weight polyethylene is used as the resin matrix to prepare low-friction polymer lubricating materials, fibers, lubricants, nano-fillers and other additi...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K3/28
CPCC08K3/28C08K2201/003C08K2201/011C08L2207/068C08L23/06
Inventor 张新瑞杨增辉李宋王齐华王廷梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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