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Lipophilic carbon quantum dot-based nanometer lubricating oil additive and preparation method thereof

A lubricating oil additive, carbon quantum dot technology, applied in the direction of additives, lubricating compositions, petroleum industry, etc., can solve problems such as difficult dispersion and agglomeration, achieve easy operation, reduce friction and wear, and improve dispersion and stability Effect

Active Publication Date: 2020-11-17
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extremely high activity and surface energy of carbon quantum dots means that they are difficult to disperse in PAO and are prone to agglomeration, so there are very few studies involving carbon quantum dots as PAO additives

Method used

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  • Lipophilic carbon quantum dot-based nanometer lubricating oil additive and preparation method thereof
  • Lipophilic carbon quantum dot-based nanometer lubricating oil additive and preparation method thereof
  • Lipophilic carbon quantum dot-based nanometer lubricating oil additive and preparation method thereof

Examples

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preparation example Construction

[0046] In a specific embodiment, the preparation method of the additive comprises the following steps:

[0047] a. mixing anhydrous citric acid and lipophilic long carbon chain amines evenly to obtain a mixture;

[0048] b. Heating the mixture at 240-320°C, preferably at 300°C for 6-12 hours, more preferably 12 hours, to obtain a black gel;

[0049] c. Dissolving the black jelly in a dispersant, centrifuging to remove solid impurities to obtain a black dispersion;

[0050] d. Dialyze the black dispersion with the dispersion for 2 to 4 days to obtain a dialysate, dry the dialysate, and remove the dispersant to obtain the target product;

[0051] The dispersant is at least one of tetrahydrofuran, methylcyclohexane, and acetone;

[0052] The lipophilic long carbon chain amine is preferably a long carbon amine with 12 to 18 carbons; preferably the lipophilic long carbon chain amine is dodecylamine, tetradecylamine, cetylamine, oleylamine A sort of.

[0053] In a specific embod...

Embodiment 1

[0071] A method for preparing lipophilic carbon quantum dot-based nano lubricating oil additives, specifically comprising the following steps:

[0072] (1) Mix 2 g of anhydrous citric acid and 10 ml of oleylamine, stir to make them evenly mixed, wherein anhydrous citric acid is the carbon source, and oleylamine is the reaction medium and functional reagent;

[0073] (2) Transfer the mixed solution in step (1) to a 50ml polytetrafluoroethylene reactor, then transfer the reactor to a muffle furnace, and react at 300° C. for 12 hours to obtain a black gel. Wherein, the heating rate of the muffle furnace is 10° C. / min.

[0074] (3) Dissolve the black jelly in step (2) in 24ml of tetrahydrofuran, and use magnetic stirring to dissolve it completely to obtain a black dispersion, wherein the magnetic stirring rate is 500rpm / min;

[0075] (4) Transfer the black dispersion in step (3) to a centrifuge tube, and centrifuge at a speed of 10000rpm / min for 15min to obtain a black dispersion...

Embodiment 2-4

[0089] Select anhydrous citric acid as carbon source, embodiment 2-4 adopts dodecylamine, tetradecylamine, hexadecylamine respectively as reaction medium and functionalization reagent respectively, and corresponding addition amount and molar proportion are identical with embodiment 1, The corresponding experimental scheme refers to Example 1. The surfaces of the products obtained in Examples 2-4 all contain hydroxyl groups, carboxyl groups, carbonyl groups, and epoxy groups, and R is respectively dodecyl, tetradecyl and hexadecyl. The corresponding experimental parameters and experimental results are shown in Table 1:

[0090] Table 1 embodiment 2-4 experimental parameters and experimental results

[0091] Example 2 Example 3 Example 4 carbon source anhydrous citric acid anhydrous citric acid anhydrous citric acid Addition amount of carbon source (g) 2 2 2 functionalization reagent Dodecylamine tetradecylamine Hexadecylamine A...

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Abstract

The invention relates to an oleophylic carbon quantum dot-based nanometer lubricating oil additive and a preparation method thereof, belonging to the technical field of lubricating materials. According to the oleophylic carbon quantum dot-based nanometer lubricating oil additive, the additive is a carbon quantum dot; the carbon quantum dot is grafted with a group as shown in a formula I which is described in the specification, and is also grafted with at least one selected from a hydroxyl group, a carboxyl group, a carbonyl group and an epoxy group; and R in the formula I is a long carbon chain with 12-18 carbons. The additive prepared by the invention has significantly improved dispersibility and stability in base oil, and has small particle size and uniform size distribution; and the preparation method is simple in process, easy to operate and beneficial to large-scale production.

Description

technical field [0001] The invention relates to a lipophilic carbon quantum dot-based nano lubricating oil additive and a preparation method thereof, belonging to the technical field of lubricating materials. Background technique [0002] Polyalphaolefin (PAO) is a common synthetic lubricating oil and the most widely used non-polar hydrocarbon base oil at present. It is made of α-olefin by polymerization of ethylene, and then further polymerized and hydrogenated by α-olefin. And made. PAO has been used in the lubrication field for nearly 90 years since its birth. Because of its good viscosity-temperature and low-temperature fluidity, PAO has become an ideal base oil for preparing various high-grade and special lubricants. In industrial production, people are always looking for ways to improve the efficiency of energy use and the service life of mechanical equipment. As mentioned earlier, PAO is a commonly used synthetic lubricating oil. Further improving the lubricating per...

Claims

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Application Information

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IPC IPC(8): C10M159/12C10M169/04C10N30/06
CPCC10M159/12C10M169/042C10M2201/041C10M2201/14C10M2205/0285
Inventor 唐伟伟李玉峰
Owner PANZHIHUA UNIV
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