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Lubricating grease and preparation method thereof

A technology of lubricating grease and lithium-based lubricating grease, applied in lubricating compositions, petroleum industry, additives, etc., to achieve good extreme pressure resistance, high yield, good load bearing and anti-wear and anti-friction capabilities

Active Publication Date: 2015-10-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Extreme pressure additives are an important class of additives in lubricants, and there is no report on using ZIF-71 as a grease additive

Method used

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  • Lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of ZIF-71 material: according to molar ratio is dihydrate zinc acetate (Zn(OAc) 2 2H 2 O, Sigma-Aldrich (Shanghai) Trading Co., Ltd.): 4,5-dichloroimidazole (dcIm, Fluorochem Ltd): formic acid (HCOOH, Aladdin Reagent (Shanghai) Co., Ltd.) = 1.0:3.0:1.0 Feed preparation. 1.0 mmol (0.219 g) Zn(OAc) 2 2H 2 O, add 10 mL methanol (CH 3 OH, Aladdin Reagent (Shanghai) Co., Ltd.); 3.0 mmol (0.411 g) of dcIm and 1.0 mmol (0.046 g) of formic acid were added to 10 mL of methanol, mixed after dissolution, and stirred at room temperature for 30 minutes. After the reaction, centrifuge at 2000 rpm for 2 minutes, wash with absolute ethanol three times, and air-dry the product at room temperature.

[0021] The preparation method of basic lithium-based grease: Weigh 150.0 g of base lubricating oil, pour 50.0 g of base lubricating oil into the grease making kettle, start the stirrer, heat up to 75 ± 5 ℃, and put in 14.6 g of octadecanoic acid (C 18 h 36 o 2...

Embodiment 2

[0025] Adopt the ZIF-71 material prepared in embodiment 1;

[0026] The preparation method of base lubricating grease is the same as in Example 1, the difference is: 14.6 g octadecanoic acid (C 18 h 36 o 2 , Aladdin Reagent (Shanghai) Co., Ltd.) was replaced by 15.4 g 12-hydroxy-octadecanoic acid (C 18 h 36 o 3 , Ti Xiai (Shanghai) Chemical Industry Development Co., Ltd.).

[0027] Add 3.0g of ZIF-71 material directly to 97.0g of basic lithium base grease as a grease additive, use a three-roller mill to roll and grind 3 times, so that the ZIF-71 material is evenly mixed in the base grease, and 3.0wt% ZIF-71 is obtained. grease samples.

[0028] Using the four-ball friction and wear testing machine to evaluate the maximum non-jamming load ( P B ) and sintering load ( P D ), the method is the same as in Example 1. The measured data are shown in Table 1.

Embodiment 3

[0030] The ZIF-71 material and base grease prepared in Example 1 were used.

[0031] Add 5.0g of ZIF-71 material directly to 95.0g of basic lithium base grease as a grease additive, use a three-roller mill to roll and grind 3 times, so that the ZIF-71 material is evenly mixed in the base grease, and 5.0wt% ZIF-71 is obtained grease samples.

[0032] Using the four-ball friction and wear testing machine to evaluate the maximum non-jamming load ( P B ) and sintering load ( P D ), the method is the same as in Example 1. The measured data are shown in Table 1.

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Abstract

The invention discloses lubricating grease and a preparation method thereof, and belongs to the technical field of lubricating grease and preparation thereof. The lubricating grease consists of the following raw materials: 95-99 parts of basic lubricating grease and 1-5 parts of additives. The additives are ZIF-71 materials with RHO topological structures. The preparation method of the lubricating grease is simple, convenient and practical, and the performance of the lubricating grease is stable. By the lubricating grease, surfaces of friction pairs can be prevented from being in contact with each other directly, friction is reduced, and the extreme pressure resistance of the lubricating grease is improved.

Description

technical field [0001] The invention relates to a lubricating grease and a preparation method thereof, in particular to a preparation method of a lubricating grease with extreme pressure resistance, and belongs to the technical field of lubricating grease and its preparation. Background technique [0002] Grease is a kind of lubricant with non-Newtonian fluid characteristics between semi-fluid and solid, which is obtained by dispersing one or more thickeners in one or more liquid lubricants. Reasonable use of grease additives can effectively improve the lubricating performance of grease and improve the friction environment of the friction pair, so as to achieve the purpose of protecting the friction pair, reducing friction, and saving energy. For mechanical equipment operating in harsh environments such as low temperature, high speed, and heavy load, the lubrication often belongs to the boundary lubrication mode. In this case, reasonable grease additives, especially extreme ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M139/00C10M159/18C10N30/06C10N50/10
Inventor 石琪王义华徐红董晋湘
Owner TAIYUAN UNIV OF TECH
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