Carbon nano tube complex filled with lubricant additive as well as preparation method and application of carbon nano tube complex

A carbon nanotube and filling lubrication technology, which is applied in the direction of lubricating compositions, additives, petroleum industry, etc., can solve the problems of reduced lubricating performance, weak load-carrying capacity, and inability to form chemical adsorption film lubrication of metals, so as to improve stability , increase the lubricating effect, reduce the friction coefficient

Inactive Publication Date: 2017-10-24
SUZHOU INST OF INDAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since there are no active chemical groups or elements on the surface of carbon nanotubes, they cannot form a chemical adsorption film with metals to lubricate under severe friction conditions, resulting in poor bearing capacity under high-speed and heavy-load friction conditions.
In addition, carbon n

Method used

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  • Carbon nano tube complex filled with lubricant additive as well as preparation method and application of carbon nano tube complex
  • Carbon nano tube complex filled with lubricant additive as well as preparation method and application of carbon nano tube complex
  • Carbon nano tube complex filled with lubricant additive as well as preparation method and application of carbon nano tube complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of preparation method of the carbon nanotube composite filled with oleic acid of the present embodiment 1, comprises the following steps:

[0048] (1) 80 parts of the carbon nanotubes are cut and shortened by mechanical ball milling, so that the aspect ratio thereof is 10:1 to 20:1;

[0049] (2) adding the treated carbon nanotubes into 400mL of concentrated nitric acid and 160mL of sulfuric acid mixed solution, under mechanical stirring, heating to reflux for 2h, and then cleaning and drying to obtain acidified carbon nanotubes;

[0050] (3) 20 parts of oleic acid was sheared and dispersed in 5L deionized water to obtain an emulsion, then acidified carbon nanotubes were added, mechanically stirred under ultrasonic conditions, and filled at 60°C for 13 hours. The carbon nanotube composite filled with oleic acid is prepared by washing with organic solvent, suction filtration, vacuum drying and ultrafine pulverization.

Embodiment 2

[0052] A preparation method of a carbon nanotube composite filled with dihydrocarbyl pentasulfide (RC2540) of the present embodiment 2, comprising the following steps:

[0053] (1) 80 parts of the carbon nanotubes are cut and shortened by mechanical ball milling, so that the aspect ratio thereof is 10:1 to 20:1;

[0054] (2) adding the treated carbon nanotubes into 400mL concentrated nitric acid and 160mL sulfuric acid mixed solution, under mechanical stirring, heating and refluxing for 120min, then cleaning and drying to obtain acidified carbon nanotubes;

[0055] (3) Disperse 20 parts of dihydrocarbyl pentasulfide in 5L of deionized water by shearing to obtain a lubricant additive emulsion, then add acidified carbon nanotubes, mechanically stir under ultrasonic conditions, fill at 80°C for 13 hours, and the filling is complete Finally, the carbon nanotube compound filled with dihydrocarbyl pentasulfide is obtained by washing with an organic solvent, suction filtration, vacuu...

Embodiment 3

[0057] In order to prove that the carbon nanotube composites prepared in Examples 1-2 are filled with lubricating additives, the present embodiment uses infrared spectroscopy (IR) analysis to characterize the carbon nanotube composites prepared in Examples 1-2. According to the characteristic difference of the absorption peaks in the infrared region of the carbon nanotubes before and after filling, it is judged whether the carbon nanotubes have been filled with the lubricating additive.

[0058] First, conduct infrared spectrum analysis on the carbon nanotubes that have been acidified and not filled. After being oxidized by acid, the carbon nanotubes are -1 Office and 1722cm -1 The absorption peaks of hydroxyl and carboxyl groups appeared nearby, indicating that the acidified carbon nanotubes were equipped with oxygen-containing functional groups, at 1543cm -1 The planar absorption peak of the carbon ring structure appears at , which proves that the tubular structure of carbo...

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Abstract

The invention belongs to the technical field of lubricants and discloses a carbon nano tube complex filled with a lubricant additive and a preparation method of the carbon nano tube complex. The complex is a one-dimensional nano composite material obtained by filling an oiliness additive or an extreme pressure additive into inner cavities of carbon nano tubes subjected to acidizing treatment, and the complex comprises 80-90 parts of carbon nano tubes and 10-20 parts of the oiliness additive or 10-20 parts of the extreme pressure additive. The complex serving as a lubricant additive can permeate into a friction area along with base fluid. The carbon nano tubes are extruded, deformed and broken in the friction process, the lubricant additive can be released, and a lubricating film is produced through physical or chemical adsorption so as to achieve a lubricating effect, so that the antifriction, wear-resistant and extreme pressure properties of the carbon nano tubes are improved. The complex disclosed by the invention further serves as an additive of certain commercial lubricating oil. Compared with lubricating oil added with pure carbon nano tubes, the lubricating oil added with the complex according to a proper ratio has the advantages that the friction coefficient of the lubricating oil can be obviously reduced, the wear is reduced, and the maximum non-seizure load of the lubricating oil is improved.

Description

technical field [0001] The invention belongs to the technical field of lubricants, and in particular relates to a carbon nanotube compound filled with lubricant additives and a preparation method and application thereof. Background technique [0002] Applying carbon nanotubes to the field of lubrication is a new development direction. Carbon nanotubes have a hollow cylindrical structure surrounded by graphite surfaces and have excellent self-lubricating properties. When used as lubricating additives, they can significantly reduce the friction coefficient and wear rate of the lubricating system. However, since there are no active chemical groups or elements on the surface of carbon nanotubes, they cannot form a chemisorption film with metals to lubricate under severe friction conditions, resulting in poor bearing capacity under high-speed, heavy-load friction conditions. In addition, carbon nanotubes belong to a multiphase dispersion system in the lubricating medium, with hu...

Claims

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Application Information

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IPC IPC(8): C10M125/02C10M141/02C10M141/08C10M177/00C10N30/06
CPCC10M125/02C10M141/02C10M141/08C10M177/00C10M2201/041C10M2207/126C10M2219/082C10N2030/06
Inventor 关集俱
Owner SUZHOU INST OF INDAL TECH
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