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Modified carbon nanotube ionic liquid layered liquid crystal lubricant and preparation method thereof

An ionic liquid, layered liquid crystal technology, applied in the field of lubrication, can solve problems such as leakage and creep that have not been effectively solved, achieve a good balance, reduce creep and leakage, and improve dispersion and lubricity.

Active Publication Date: 2020-11-03
郑州宏润科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, the semi-solid lubricant formed by compounding ionic liquid and lamellar liquid crystal has the advantages of low vapor pressure, non-volatility, non-flammability and excellent thermal stability. It is used in various mechanical equipment, space environment and micro-nano electromechanical system The research has achieved certain experimental results, but the problems of leakage and crawling during use have not been effectively resolved

Method used

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  • Modified carbon nanotube ionic liquid layered liquid crystal lubricant and preparation method thereof
  • Modified carbon nanotube ionic liquid layered liquid crystal lubricant and preparation method thereof
  • Modified carbon nanotube ionic liquid layered liquid crystal lubricant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: Preparation of modified carbon nanotubes

[0030] Weigh 0.5 g of carbon nanotubes and place them in 50 mL of sulfuric acid / nitric acid (v / v 3:1) mixed solution for ultrasonic dispersion for 1 h, then reflux in a water bath at 80 °C for 4 h, filter, and wash repeatedly with a large amount of deionized water and acetone until The filtrate was neutral, dried and ground; the ground carbon nanotubes were placed in 50mL SOCl 2 , ultrasonically treated for 0.5h, using DMF as a catalyst, stirred and refluxed at 80°C for 2h, filtered, dried, and ground for later use; the treated Carbon nanotubes and stearyl alcohol are placed in a DMF solution, ultrasonically dispersed for 0.5 h, stirred and refluxed at 80° C. for 24 h, filtered, washed, and dried to obtain stearyl alcohol-modified carbon nanotubes.

Embodiment 2

[0031] Embodiment 2: Preparation of 0.05% S-CNT ionic liquid lamellar liquid crystal lubricant

[0032] Weigh 0.1g of Brij30 in a 100mL beaker to obtain an aqueous solution of 0.1wt% Brij30; then add 50mg of the modified carbon nanotubes in Example 1 to the solution, and the mixture is ultrasonically ultrasonicated for 24h in an ultrasonic cleaner to finally obtain Uniform black dispersion. According to mass ratio Brij30 / BP304 / H 2 O=55:13:32, weigh with carbon nanotube dispersion instead of water, then mix evenly at about 70°C, centrifuge, stir, and repeat these two steps to make the sample fully mixed. Put it in a constant temperature box (25±0.1)°C for more than two weeks to make it reach equilibrium, and prepare a carbon nanotube ionic liquid lamellar liquid crystal lubricant.

Embodiment 3

[0033] Embodiment 3: Preparation of 0.1% S-CNT ionic liquid lamellar liquid crystal lubricant

[0034] Weigh 0.1g of Brij30 in a 100mL beaker to obtain an aqueous solution of 0.1wt% Brij30; then add 100mg of the modified carbon nanotubes in Example 1 to the solution, and the mixture is ultrasonically ultrasonicated for 24h in an ultrasonic cleaner to finally obtain Uniform black dispersion. According to mass ratio Brij30 / BP304 / H 2 O=55:13:32, the carbon nanotube dispersion was used instead of water to weigh, and the rest of the steps were the same as in Example 2.

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Abstract

The invention relates to a modified carbon nanotube ionic liquid layered liquid crystal lubricant and a preparation method thereof. The lubricant with anti-creeping performance is prepared by compounding stearyl alcohol modified carbon nanotubes and ionic liquid layered liquid crystals. In the invention, the stearyl alcohol modified carbon nanotube is introduced into the ionic liquid layered liquid crystal, so that the dispersity and lubricity of the carbon nanotube are improved, and meanwhile, the problems of creeping and leakage in the use process of the lubricant are also solved to a certain extent; the modified carbon nanotube ionic liquid layered liquid crystal lubricant prepared by the invention is a semi-liquid semi-solid lubricant, achieves better balance in friction reduction, wear resistance and anti-creeping performance, and can be applied to lubrication of balls, pin rollers, bearing rings and the like.

Description

technical field [0001] The invention relates to the technical field of lubrication, in particular to a modified carbon nanotube ionic liquid layered liquid crystal lubricant and a preparation method thereof. Background technique [0002] Friction is everywhere. Most of the world's energy consumption is used to resist friction. Therefore, reducing friction and wear is an effective way to improve energy efficiency. The use of oils and greases is a common way to reduce friction and reduce wear. At present, the lubrication methods mainly include solid lubrication and liquid lubrication. Compared with liquid lubrication, solid lubrication has some insurmountable defects such as large friction resistance and inability to self-repair. However, due to complex environmental factors such as microgravity and vacuum, the lubricating liquid lacks a backflow replenishment mechanism and has certain volatility. It is very easy to cause creep loss. The creeping motion often affects the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M177/00C10N50/10
CPCC10M169/044C10M177/00C10M2201/14C10M2209/104C10M2209/108C10M2223/04
Inventor 陈丽萍周慧
Owner 郑州宏润科技股份有限公司
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