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Recyclable carbon quantum dot nano lubricating oil additive and preparation method thereof

A technology of lubricating oil additives and carbon quantum dots, applied in the directions of additives, chemical recovery, lubricating compositions, etc., can solve problems such as unreported, achieve the effects of improving dispersibility, being beneficial to large-scale production, and being easy to operate

Active Publication Date: 2020-07-31
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Recyclable carbon quantum dot nano lubricating oil additive and preparation method thereof
  • Recyclable carbon quantum dot nano lubricating oil additive and preparation method thereof
  • Recyclable carbon quantum dot nano lubricating oil additive and preparation method thereof

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preparation example Construction

[0054] In a specific embodiment, the preparation method of the additive comprises the following steps:

[0055] a. Combine the carbon source with CO 2 The responsive amine and the reaction medium are uniformly mixed to obtain a mixture;

[0056] b. Reflux the mixture at 180-240°C, preferably 220°C, for 2-6 hours, preferably 2-4 hours, to obtain a black dispersion;

[0057] c. Distilling the black dispersion under reduced pressure, removing the reaction medium to obtain a black jelly, washing and drying the black jelly to obtain the target product;

[0058] The carbon source is preferably one or more of citric acid monohydrate, ascorbic acid, and gluconic acid;

[0059] The CO 2 Responsive amines are preferably 2-amino-5-diethylaminopentane, 3-(dibutylamino)propylamine, 1,4-bis(3-aminopropyl)piperazine, (s)-2-(ammonia At least one of methyl)-1-ethylpyrrolidine and N,N-diisopropylethylenediamine; the reaction medium is one of n-hexanol, n-heptanol and n-octanol, preferably ...

Embodiment 1

[0086] A preparation method of recyclable carbon quantum dot nano lubricating oil additive, specifically comprising the following steps:

[0087] (1) Under oil bath conditions, 0.02M C 6 h 8 o 7 ·H 2 O and 0.07M 2-amino-5-diethylaminopentane are mixed, and the molar ratio is 1:3.5, then add 15ml n-octanol, stir and make it mix uniformly, wherein C 6 h 8 o 7 ·H 2 O is a carbon source, and n-octanol is a reaction medium;

[0088] (2) Transfer the mixed solution in step (1) to a 100ml three-necked flask, and reflux for 4h under magnetic stirring and nitrogen protection to obtain a black dispersion. Among them, the nitrogen gas flow rate is 10 -3 m 3 / min, the magnetic stirring rate is 120rpm / min, and the reaction temperature is 220°C.

[0089] (3) carry out decompression distillation to black dispersion liquid in step (2), after removing the n-octanol as reaction medium, obtain black colloid;

[0090] (4) Under the assistance of ultrasound, wash the black jelly in step...

Embodiment 2-5

[0107] Based on the amidation reaction, a recyclable carbon quantum dot nano-lubricating oil additive was prepared by a one-step pyrolysis method, and C 6 h 8 o 7 ·H 2 O as the carbon source, n-octanol as the reaction medium, 3-(dibutylamino)propylamine, 1,4-bis(3-aminopropyl)piperazine, (s)-2-(aminomethyl)-1 -Ethylpyrrolidine and N,N-diisopropylethylenediamine respectively replace 2-amino-5-diethylaminopentane as functional reagents, the corresponding addition amount and molar ratio remain unchanged, and the corresponding experimental scheme refers to Embodiment 1, the R of the product that embodiment 2-5 obtains is hydroxyl, carboxyl and carbonyl, epoxy group. The corresponding experimental parameters and experimental results are shown in Table 1:

[0108] Table 1 embodiment 2-5 experimental parameters and experimental results

[0109]

[0110]

[0111] As can be seen from the results in Table 1, 3-(dibutylamino)propylamine, 1,4-bis(3-aminopropyl)piperazine, (s)-2...

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Abstract

The invention relates to a recyclable carbon quantum dot nano lubricating oil additive and a preparation method thereof, and belongs to the technical field of lubricating materials. The structure of the recyclable carbon quantum dot nano lubricating oil additive is shown as a formula I, wherein a big black spot is used for representing carbon quantum dots, R is an oxygen-containing group, and M isan amino-containing carbon chain. The carbon quantum dot nano lubricating oil additive has unique CO2 responsiveness, and by means of the CO2 responsiveness, recycling and cyclic utilization of the carbon quantum dot nano lubricating oil additive in used PAO lubricating oil can be achieved. After multiple times of recycling, the tribological properties are not obviously weakened, so that the additive has a good application prospect. The preparation and functionalization are completed in one step, the prepared carbon quantum dots with CO2 responsiveness are small in particle size and uniform in size distribution, and the preparation process is simple, easy to operate and beneficial to large-scale production.

Description

technical field [0001] The invention relates to a recyclable carbon quantum dot nano lubricating oil additive and a preparation method thereof, belonging to the technical field of lubricating materials. Background technique [0002] According to reports, one-third of the total energy of the earth is consumed in the form of friction. In addition, 55-60% of mechanical equipment damage is caused by poor lubrication and wear, and the economic loss caused by friction and wear in my country is as high as 60 billion yuan every year. As the natural enemy of friction and wear, lubrication emerges at the historic moment and is ubiquitous in life, production and even aerospace. With the progress of human society, mechanical equipment has more and more stringent requirements on the performance of base lubricating oil, and lubricating additives are the essence of endowing and improving lubricating performance of lubricating oil to obtain high-grade lubricating oil. In recent years, for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/02C10M177/00C10M169/04C10M175/00C10N30/06C10N30/04
CPCC10M125/02C10M177/00C10M169/04C10M175/0083C10M175/00C10M2201/14C10M2205/0206Y02P20/584
Inventor 唐伟伟李玉峰朱学军蒋志强
Owner PANZHIHUA UNIV
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