Dialkyldithiophosphoric acid modified zinc oxide nanoparticles as well as preparation method and application thereof

A technology of zinc dihydrocarbyl dithiophosphate and dihydrocarbyl dithiophosphoric acid, which is applied in the fields of dyeing low-molecular organic compound treatment, petroleum industry, additives, etc., and can solve the problems of large particle size, complicated steps, stable dispersion, etc.

Active Publication Date: 2019-08-16
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of zinc oxide nanoparticles includes plasma discharge method on zinc salt solution (Chinese patent application number 201610274736.7), and the reaction of zinc salt with alkali and roasting (application number 201610069163.4; application number 201810003317.9; application number 201310284257. X; application number 201811472821.X), or with the participation of water-soluble modifiers, zinc salts react with alkali to produce water-soluble nano-zinc oxide (application number 201110330128.0). These methods have complicated steps and harsh conditions, and the particle size of the obtained products Larger and difficult to disperse stably in lubricating base oils

Method used

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  • Dialkyldithiophosphoric acid modified zinc oxide nanoparticles as well as preparation method and application thereof
  • Dialkyldithiophosphoric acid modified zinc oxide nanoparticles as well as preparation method and application thereof
  • Dialkyldithiophosphoric acid modified zinc oxide nanoparticles as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0026] A method for preparing dihydrocarbyl dithiophosphoric acid modified zinc oxide nanoparticles, specifically: adding 0.5 mL of 1.6 mol / L methanol solution of sodium hydroxide to 15 mL of 0.053 mol / L zinc dihydrocarbyl dithiophosphate while stirring (R 1 And R 2 Respectively n-butyl and n-octyl, the specific structure is shown in Table 1) in tetrahydrofuran, reacted at 40 ℃ for 10 h, through rotary evaporation, washing, and drying to obtain light yellow powder, which is the dihydrocarbyl dithiophosphoric acid modified zinc oxide nano grain.

[0027] The TEM picture of the prepared dihydrocarbyl dithiophosphoric acid modified zinc oxide nanoparticles can be seen figure 1 . by figure 1 It can be seen that the prepared dihydrocarbyl dithiophosphoric acid modified zinc oxide nanoparticles have a uniform particle size and an average particle size of 4 nm. The organic modifier dihydrocarbyl dithiophosphoric acid isolates the zinc oxide nanoparticles and inhibits the size of the nan...

Embodiment 2

[0033] A method for preparing dihydrocarbyl dithiophosphoric acid modified zinc oxide nanoparticles, specifically: adding 0.5 mL of 1.6 mol / L potassium hydroxide in anhydrous ethanol solution to 15 mL of 0.053 mol / L dihydrocarbyl dithio Zinc phosphate (R 1 And R 2 The same is n-octyl group, the specific structure is shown in Table 1) in tetrahydrofuran, reacted at 30 ℃ for 12 h, and obtained light yellow powder through rotary evaporation, washing, and drying, which are dihydrocarbyl dithiophosphoric acid modified zinc oxide nanoparticles.

Embodiment 3

[0035] A preparation method of dihydrocarbyl dithiophosphoric acid modified zinc oxide nanoparticles, specifically: 0.52 mL of methanol solution of tetraethylammonium hydroxide (40 wt%) is stirred into 15 mL of 0.053mol / L dihydrocarbyl disulfide Zinc Substituted Phosphate (R 1 And R 2 The same is n-octylbenzene, the specific structure is shown in Table 1) in tetrahydrofuran, reacted at 30 ℃ for 14 h, and then obtained by rotary evaporation, washing, and drying to obtain light yellow powder, which is dihydrocarbyl dithiophosphoric acid modified zinc oxide nanoparticles.

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Abstract

The invention belongs to the technical field of lubricating oil additives, and discloses dialkyldithiophosphoric acid modified zinc oxide nanoparticles, a preparation method and application thereof. The method comprises the following steps: adding an alcohol solution of inorganic strong alkali or organic strong alkali into a polar organic solvent of zinc dialkyldithiophosphate, performing a reaction at 30-40 DEG C for 10-14 hours, removing the solvent after the reaction is finished, and washing and drying a reaction product to obtain the dialkyldithiophosphoric acid modified zinc oxide nanoparticles. The invention further discloses an application of dialkyldithiophosphoric acid modified zinc oxide nanoparticles as an antifriction and anti-wear additive in aluminum-based friction pair lubricating oil. The dialkyldithiophosphoric acid modified zinc oxide nanoparticles are small in particle size and uniform in distribution, and have excellent dispersion stability in lubricating oil. The product has outstanding antifriction and anti-wear effects on aluminum and aluminum alloy, and has a wide application prospect in the field of lubrication of automobiles, aviation and aerospace equipment.

Description

Technical field [0001] The invention belongs to the technical field of lubricating oil additives, and specifically relates to a dihydrocarbyl dithiophosphoric acid modified zinc oxide nanoparticle, and a preparation method and application thereof. Background technique [0002] Under the environmental pressure of energy saving and emission reduction, aluminum and aluminum alloys have been widely used in the automotive engine industry due to their advantages of low density, corrosion resistance, high thermal conductivity, and good workability. However, due to the special properties of aluminum and aluminum alloys, some traditional lubricant additives are not suitable for aluminum-based friction pair materials. Since its inception, zinc dihydrocarbyl dithiophosphate (ZDDP) has been widely used in the field of lubricants due to its excellent extreme pressure, anti-wear and anti-oxidant and anti-corrosion functions. However, the anti-wear mechanism of ZDDP is based on the formation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/10C09C1/04C09C3/08C10N30/06
CPCC01P2002/01C01P2002/72C01P2002/82C09C1/043C09C3/08C10M125/10C10M2201/14C10N2030/06
Inventor 张晟卯张玉娟张治军张平余张园园
Owner HENAN UNIVERSITY
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