Method for preparing surface-modified nanometer yttrium oxide by emulsion polymerization and application thereof

A technology for surface modification of nanometer and nanometer yttrium oxide, which is applied in anti-friction lubricating oil additives, anti-wear, and extreme pressure fields. It can solve the problems of non-oil solubility and easy aggregation of nanoparticles, and achieve good extreme pressure effects.

Inactive Publication Date: 2010-02-03
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the current research status, in order to obtain high-performance lubricating oil additives, it is necessary to overcome the shortcomings of nano-particles that are easy to agglomerate and non-oil-soluble. Therefore, it is of great significance to develop inorganic-organic nanocomposite rare earth-based additives.

Method used

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  • Method for preparing surface-modified nanometer yttrium oxide by emulsion polymerization and application thereof
  • Method for preparing surface-modified nanometer yttrium oxide by emulsion polymerization and application thereof
  • Method for preparing surface-modified nanometer yttrium oxide by emulsion polymerization and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 4.35 g of nano-yttrium oxide with a particle size between 10 and 50 nm to prepare a suspension, add an emulsifier, dodecyltrimethylammonium chloride, and disperse with ultrasonication and stirring for 3 hours. Then the temperature is raised to 60 DEG C under nitrogen atmosphere, then adding the monomer styrene and butyl acrylate with a fixed mass ratio of 7: 3, the monomer styrene consumption is 20g, and the initiator ammonium persulfate consumption is 2% of the monomer styrene consumption. 1.5%, initiate polymerization at 75°C for 10h. The composite particle obtained after the polymerization reaction is finished is dried to obtain the surface-modified nanometer yttrium oxide.

Embodiment 2

[0018] Weigh 4.35 g of nano-yttrium oxide with a particle size between 10 and 50 nm to prepare a suspension, add an emulsifier, dodecyltrimethylammonium chloride, and disperse with ultrasonication and stirring for 3 hours. Then it is heated up to 60 DEG C under nitrogen atmosphere, and then adding the monomer styrene and butyl acrylate that the fixed mass ratio is 7: 3, the monomer styrene consumption is 40g, and the initiator ammonium persulfate consumption is 1% of the monomer styrene consumption. 1.5%, initiate polymerization at 75°C for 10h. The composite particle obtained after the polymerization reaction is finished is dried to obtain the surface-modified nanometer yttrium oxide.

Embodiment 3

[0020] Weigh 4.35 g of nano-yttrium oxide with a particle size between 10 and 50 nm to prepare a suspension, add an emulsifier, dodecyltrimethylammonium chloride, and disperse with ultrasonication and stirring for 3 hours. Then the temperature is raised to 60 DEG C under nitrogen atmosphere, and then adding the monomer styrene and butyl acrylate with a fixed mass ratio of 7: 3, the monomer styrene consumption is 60g, and the initiator ammonium persulfate consumption is 1% of the monomer styrene consumption. 1.5%, initiate polymerization at 75°C for 6h. The composite particle obtained after the polymerization reaction is finished is dried to obtain the surface-modified nanometer yttrium oxide.

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Abstract

The invention discloses a method for preparing surface-modified nanometer yttrium oxide by emulsion polymerization and an application thereof. The preparation method has the following steps of: first,preparing nanometer yttrium oxide suspension, adding emulsifier dodecyl trimethyl ammonium chloride, ultrasonically processing, stirring and diffusing for 3h; then, heating to 60 DEG C in nitrogen atmosphere, adding monomer styrene and butyl acrylate with a fixed quality ratio, and finally adding initiator ammonium persulphate to initiate polymerization reaction at 75 DEG C; drying the compound particles obtained after the finishing of the polymerization reaction to obtain the surface-modified nanometer yttrium oxide; and directly ultrasonically diffusing the modified nanometer yttrium oxidein liquid paraffin base oil or finished lubricant as an extreme-pressure, wear-resistant and anti-friction additive. The surface-modified nanometer yttrium oxide has excellent extreme-pressure, wear-resistant and anti-friction effects.

Description

technical field [0001] The invention relates to an extreme pressure, anti-wear and anti-friction lubricating oil additive, in particular to a preparation method of surface-modified nanometer yttrium oxide by emulsion polymerization and its application as an extreme-pressure, anti-wear and anti-friction additive. Background technique [0002] In recent years, the research of nanoparticles as extreme pressure anti-wear and anti-friction additives has attracted the attention of many researchers. Nanoparticles show excellent tribological properties under lubrication conditions such as high temperature, high load, and environmental friendliness. However, there is a common shortcoming in the preparation, that is, to prepare nanoparticles first, and then add an appropriate dispersant to form a suspension in the base oil. However, due to the high surface energy, the bare nanoparticles are easy to coalesce and grow, and the surface activity decreases, which affects the interaction wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/10C10M125/10C10N30/06
Inventor 余林缪飞孙明刁贵强范方强余倩郝志峰余坚李永峰
Owner GUANGDONG UNIV OF TECH
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