Method for simultaneously and stably dispersing spherical nanoparticles in oil medium by using layered nanosheets and application thereof

• US 10,450,529 B2
• Filed: 09/23/2014
• Issued: 10/22/2019
• Est. Priority Date: 08/05/2014
• Status: Active Grant

• Current Assignee: South University Of Science And Technology Of China
• Original Assignee: South University Of Science And Technology Of China
• Inventors: Yong, Huaisong, Sun, Dazhi
• Primary Examiner(s): Singh, Prem C
• Assistant Examiner(s): Campanell, Francis C
• Application Number:
  US15/310,828
• Publication Number:
  US 20170145338A1
• Time in Patent Office: 1,855 Days
• Field of Search: 508150, 508151, 508153
• CPC Class Codes: C09K 23/002 Inorganic compounds
• CPC Class Codes: C10M 141/06 at least one of them being an organic nitrogen-containing compound
• CPC Class Codes: C10M 161/00 Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
• CPC Class Codes: C10M 177/00 Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
• CPC Class Codes: C10M 2201/05 Metals; Alloys
• CPC Class Codes: C10M 2201/062 Oxides; Hydroxides; Carbonates or bicarbonates
• CPC Class Codes: C10M 2201/065 Sulfides; Selenides; Tellurides
• CPC Class Codes: C10M 2201/085 Phosphorus oxides, acids or salts
• CPC Class Codes: C10M 2201/103 Clays; Mica; Zeolites
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/08 Amides
• CPC Class Codes: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2010/06 Groups 3 or 13
• CPC Class Codes: C10N 2010/08 Groups 4 or 14
• CPC Class Codes: C10N 2010/12 Groups 6 or 16
• CPC Class Codes: C10N 2010/14 Group 7
• CPC Class Codes: C10N 2010/16 Groups 8, 9, or 10
• CPC Class Codes: C10N 2020/06 Particles of special shape or size
• CPC Class Codes: C10N 2020/071 Branched chain compounds
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure

Abstract

Provided are a method for simultaneously and stably dispersing spherical nanoparticles in an oil medium by using layered nanosheets and an application thereof. The method comprises: (1) mixing the layered nanosheets and oil-soluble alkylamines to obtain a first mixture containing intercalated/exfoliated nano sheets; (2) mixing spherical nanoparticles and the oil medium to obtain a second mixture; and (3) mixing the first mixture, the second mixture and the oil medium to obtain a third mixture.

Claims

1. A method for simultaneously and stably dispersing spherical nanoparticles in an oil medium by using layered nanosheets, comprising:

mixing the layered nanosheets and oil-soluble alkylamines to obtain a first mixture where the layered nanosheets are intercalated/exfoliated with the oil-soluble alkylamines;

mixing the spherical nanoparticles and the oil medium to obtain a second mixture; and

mixing the first mixture, the second mixture and the oil medium to obtain a third mixture where the spherical nanoparticles and the layered nanosheets are stably dispersed;

wherein the layered nanosheets are at least one selected from clays, layered double hydroxides, layered disulfide metal salts and layered tungsten acid metal salts.

2. The method according to claim 1, wherein the layered nanosheets and the oil-soluble alkylamines are mixed by means of heat treatment, ultrasonic treatment or mechanical agitation.

3. The method according to claim 1, wherein the layered nanosheets are of a particle size of 10 to 4000 nm.

4. The method according to claim 1, wherein the oil-soluble alkylamines are primary amines, secondary amines, tertiary amines or cyclic amines.

5. The method according to claim 1, wherein the oil-soluble alkylamines are Guerbet primary amines, aliphatic amines or poly-aliphatic amines.

6. The method according to claim 5, wherein the Guerbet primary amines have a structure as shown in formula 1:

7. The method according to claim 5, wherein the aliphatic amines have a structure as shown in formula 2:

8. The method according to claim 7, wherein the aliphatic amines comprise unsaturated aliphatic primary amines containing C═

C.

9. The method according to claim 8, wherein the aliphatic amines are at least one selected from a group consisting of the following primary amines:

oleic amine, petroselinic amine, erucic amine, linoleic amine, linolenic amine, ricinoleic amine, 10-undecylenic amine, calendic amine, vernolic amine, santalbic amine, 5-eicosenoic amine, α

-eleostearic amine, punicic amine, Hoffman degradation amine of oleic acid amide, Hoffman degradation amine of petroselinic acid amide, Hoffman degradation amine of erucic acid amide, Hoffman degradation amine of linoleic amide, Hoffman degradation amine of linolenic acid amide, Hoffman degradation amine of ricinoleic acid amide, Hoffman degradation amine of 10-undecylenic acid amide, Hoffman degradation amine of calendic acid amide, Hoffman degradation amine of vernolic acid amide, Hoffman degradation amine of santalbic acid amine, Hoffman degradation amine of 5-eicosenoic acid amide, Hoffman degradation amine of α

-eleostearic acid amide, and Hoffman degradation amine of punicic acid amide.

10. The method according to claim 5, wherein the poly-aliphatic amines are homopolymers or copolymers of the unsaturated aliphatic primary amines containing C═

C.

11. The method according to claim 1, wherein the spherical nanoparticles are at least one selected from a group consisting of metal oxide nanoparticles, metal nanoparticles and surface-oxidized metal nanoparticles.

12. The method according to claim 11, wherein the metal oxide nanoparticles are at least one selected from a group consisting of zinc oxide nanoparticles, aluminum oxide nanoparticles, copper oxide nanoparticles, nickel oxide nanoparticles, cobalt oxide nanoparticles, Fe₂O₃ nanoparticles, Fe₃O₄ nanoparticles, magnesium oxide nanoparticles, titanium oxide nanoparticles, zirconia nanoparticles, tungsten oxide nanoparticles, molybdenum oxide nanoparticles and tin oxide nanoparticles.

13. The method according to claim 11, wherein the metal nanoparticles are at least one selected from a group consisting of copper nanoparticles, iron nanoparticles, magnesium nanoparticles, aluminum nanoparticles, titanium nanoparticles, zirconium nanoparticles and tin nanoparticles.

14. The method according to claim 1, wherein the spherical nanoparticles have a particle size of 5 to 1000 nm.

15. The method according to claim 1, wherein in the third mixture,

a molar ratio of the layered nanosheets to the oil-soluble alkylamines is 1:

1 to 1;

40; and

a volume ratio of the layered nanosheets to the spherical nanoparticles is 1;

0.001 to 1;

10.

16. The method according to claim 15, wherein in the third mixture,

the molar ratio of the layered nanosheets to the oil-soluble alkylamines is 1:

1 to 1;

25; and

the volume ratio of the layered nanosheets to the spherical nanoparticles is 1;

0.01 to 1;

5.

17. An oil blend containing both layered nanosheets and spherical nanoparticles prepared by the method according to claim 1.

18. The method according to claim 3, wherein the layered nanosheets are of a particle size of 10 to 3000 nm.

19. The method according to claim 14, wherein the spherical nanoparticles have a particle size of 50 to 800 nm.