Quick nano-copper particle preparation method

A nano-copper particle, fast technology, applied in the field of materials, can solve problems such as uneven particle size distribution, high temperature requirements, and long preparation process, and achieve the effects of saving reaction time, increasing reaction rate, and increasing yield

Inactive Publication Date: 2014-09-10
NORTHEASTERN UNIV
View PDF11 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, researchers at home and abroad have tried to add inorganic nanoparticles and organic-inorganic composite nanoparticles to lubricating oil, mainly including some inorganic simple nanoparticles (metal copper powder, nickel powder, graphite, diamond, etc.), nano boric acid Salts (nano-zinc borate, nano-titanium borate, etc.), nano-oxides and hydroxides (ZrO 2 , SiO 2 , ZnO, TiO 2 、MoO 2 , Fe 2 o 3 , Ni(OH) 2 , Mn(OH) 2 、La(OH) 3 etc.), nanosulfide (MoS 2 、WS 2 , ZnS, etc.) and other compounds (CeF 3 、LaF 3 , CaCO 3 etc.); testing the friction properties of lubricating oils, it is found that they all

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Quick nano-copper particle preparation method
  • Quick nano-copper particle preparation method
  • Quick nano-copper particle preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1

[0051] (1) Mix ethanol and water to make an ethanol aqueous solution, where the volume ratio of water to ethanol is 2:1;

[0052] (2) The reducing agent is dissolved in the ethanol aqueous solution of step (1) to prepare a reducing agent solution; the reducing agent is sodium hypophosphite and citric acid, wherein the molar ratio of citric acid to sodium hypophosphite is 1 :2; The concentration of the reducing agent in the ethanol aqueous solution is 5.20×10 -3 g / mL;

[0053] (3) Under stirring conditions, dissolve the copper salt and the dispersant in the ethanol aqueous solution of step (1) to prepare a copper salt dispersant solution; the dispersant is oleic acid; the mass ratio of the dispersant to the copper salt is 1:10; the concentration of copper salt in the ethanol aqueous solution is 0.003g / ml; the copper salt is copper sulfate pentahydrate;

[0054] (4) Heat the reducing agent solution to 85°C; under stirring and ultrasonic conditions, add the copper sal...

Example Embodiment

[0064] Example 2

[0065] The method is the same as in Example 1, the difference is:

[0066] (1) The dispersant is polyvinylpyrrolidone;

[0067] (2) The average particle diameter of the obtained nano-copper particles covered with dispersant is 210nm;

[0068] Fourier transform infrared spectroscopy such as figure 2 As shown; EDS energy spectrum as Figure 4 As shown in the figure, it can be seen that in addition to Cu element, it also contains C, O and other elements, which shows that its surface is covered with oleic acid dispersant; the ultraviolet absorption spectrum is as Picture 9 Shown

[0069] Using the above-mentioned nano-copper particles covered with a dispersant as an additive, added to crude oil to test the wear scar diameter curve, the results are as follows Picture 12 As shown; when the additive amount is 0.2%, the maximum non-stick load (P B ) Value is 280N; after adding additives, the maximum non-seize load is increased by 12%.

Example Embodiment

[0070] Example 3

[0071] Carry out 4 groups of experiments and 5 groups of comparative experiments respectively. The numbers of the 5 groups of comparative experiments are 1#, 2#, 3#, 4# and 5#; the numbers of the 4 groups of experiments are 6#, 7#, 8# and 9#; The method is the same as in Example 1, the difference is:

[0072] (1) The volume ratio of water to ethanol in the ethanol aqueous solution is 2:2;

[0073] (2) The molar ratio of citric acid and sodium hypophosphite in the reducing agent solution is 1:4; the concentration of the reducing agent in the ethanol aqueous solution is 6.80×10 -3 g / mL;

[0074] (3) The mass ratio of the dispersant to the copper salt in the copper salt dispersant solution is 1:15; the concentration of the copper salt in the ethanol aqueous solution is 0.01g / ml;

[0075] (4) Heat the reducing agent solution to 65°C; under stirring and ultrasonic conditions, add the copper salt dispersant solution dropwise to the reducing agent solution at a temperature ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Maximum non-jamming loadaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of materials, and relates to a quick nano-copper particle preparation method. The method includes the following steps: (1) preparing ethanol water; (2) dissolving a reducing agent into the ethanol water to prepare a reducing agent solution; (3) with stirring, dissolving copper salt and a dispersing agent into the ethanol water in the step (1) to prepare a copper salt and dispersing agent solution; (4) heating the reducing agent solution to 25-28 DEG C, and under the conditions of stirring and ultrasonic wave, dropwise adding the copper salt and dispersing agent solution into the reducing agent solution heated to the temperature of 25-28 DEG C; (5) heating to the temperature of 25-28 DEG C, and reacting for 2-4h; (6) filtering and separating solid-phase precipitation, putting the solid-phase precipitation into a centrifuge for centrifugation, and drying and removing moisture in vacuum to obtain nano-copper particles with the surface coated with the dispersing agent. By the method, reaction time is saved, yield is increased, the prepared nano-copper particles can be used as additives to be applied to reusable lubricating oil with antifriction and self-repairing effect.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for rapidly preparing nanometer copper particles. Background technique [0002] Friction loss has a great impact on the economy of today's society. In recent years, people are keen on the research of lubricating oil additives, and various anti-extreme pressure agents and anti-wear agents are added to lubricating oil to improve its lubricating performance. . As a nanomaterial, nano-copper particles have quantum size effects, surface effects, macroscopic quantum tunneling effects, and copper's own unique physical and chemical properties. Adding it to lubricants has the effect of extreme pressure resistance and self-repairing metal surfaces, which can improve lubrication performance and Reduce friction loss. [0003] At present, researchers at home and abroad have tried to add inorganic nanoparticles and organic-inorganic composite nanoparticles to lubricating oil, main...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22F9/24B82Y40/00
Inventor 王国栋张宝砚徐宏
Owner NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products