Titanium alloy rolling lubricating liquid based on core-shell structure SiO2 (at) Graphene quantum dots and preparation method thereof

A technology of core-shell structure and quantum dots, which is applied in the field of mechanical processing lubrication, can solve the problems of decreased anti-wear performance, etc., and achieve the effects of good extreme pressure resistance, excellent performance, and low friction coefficient at high temperature

Active Publication Date: 2021-06-08
KUNMING IRON & STEEL HLDG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, nano-silica, as a commonly used nano-material, has good high-temperature performance and high diffusivity. At the same time, it can also be added to oil as an additive to improve the extreme pressure and anti-wear properties of the product. However, in lubricating fluid, SiO 2 The amount of addition should not be too much, when it exceeds SiO 2 When the amount added exceeds the optimum value, the anti-wear performance will decrease

Method used

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  • Titanium alloy rolling lubricating liquid based on core-shell structure SiO2 (at) Graphene quantum dots and preparation method thereof
  • Titanium alloy rolling lubricating liquid based on core-shell structure SiO2 (at) Graphene quantum dots and preparation method thereof
  • Titanium alloy rolling lubricating liquid based on core-shell structure SiO2 (at) Graphene quantum dots and preparation method thereof

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Effect test

preparation example Construction

[0024] SiO of the present invention 2 A method for preparing @Graphene core-shell structure quantum dots, including the following steps:

[0025] 1) Graphene oxide is mixed with polymethylpyrrolidone and ball milled for 35-45h, the product obtained by ball milling is centrifuged at 2000-3000rpm for 20-40min, the supernatant is taken and centrifuged at 10000-12000rpm for 20-40min, and the centrifuged precipitate Washing with deionized water for 3-5 times to obtain an aqueous solution of graphene oxide quantum dots;

[0026] 2) Dissolve ethyl orthosilicate in ethanol, add the graphene oxide quantum dot aqueous solution after stirring for 2-4 hours, obtain the reaction solution after stirring for 8-12 hours, heat and evaporate to dryness in a crucible to obtain a crude product, the crude product The product was washed with deionized water and ethanol for 5-8 times and then dried to obtain SiO with a core-shell structure. 2 @Graphene quantum dot powder.

[0027] In the step 1, ...

Embodiment 1

[0039] 1) Mix 0.5g graphite powder with 3ml phosphoric acid (H 3 PO 4 ) and 30ml concentrated sulfuric acid (H 2 SO 4 )mix. The mixture was cooled to 0 °C in an ice bath and stirred for 15 min. Subsequently, 2 g of potassium permanganate (KMnO 4 ) was slowly poured into the above solution, and continued stirring at 0° C. for 15 min. After that, the temperature of the system was raised to 65 °C, and stirring was continued for 15 h. Then add 20ml of 30% hydrogen peroxide (H 2 o 2 ) hydrogen peroxide was added to the above mixture, and washed with 5% hydrochloric acid (HCl) solution and excess water until the filtrate pH=6.5. Finally, the product was centrifuged to obtain graphene oxide (GO).

[0040] 2) Add graphene oxide and polymethylpyrrolidone (NMP) into a hard steel ball mill jar at a mass ratio of 10:1, take it out after ball milling for 35 hours, first centrifuge the product at 2000rpm for 20 minutes and extract the supernatant, then The supernatant was centrifu...

Embodiment 2

[0043] 1) Mix 0.8g graphite powder with 4ml phosphoric acid (H 3 PO 4 ) and 40ml concentrated sulfuric acid (H 2 SO 4 )mix. The mixture was cooled to 0 °C in an ice bath and stirred for 25 min. Subsequently, 2.5 g of potassium permanganate (KMnO 4 ) was slowly poured into the above solution, and continued stirring at 0° C. for 25 min. Afterwards, the temperature of the system was raised to 70 °C, and the stirring was continued for 20 h. Then add 25ml of 30% hydrogen peroxide (H 2 o 2 ) hydrogen peroxide was added to the above mixture, and washed with 5% hydrochloric acid (HCl) solution and excess water until the filtrate was almost neutral. Finally, the product was centrifuged and graphene oxide (GO) was obtained.

[0044] 2) Add graphene oxide and polymethylpyrrolidone (NMP) into a hard steel ball mill tank at a mass ratio of 7:1, take it out after ball milling for 40 hours, first centrifuge the product at 3000rpm for 30 minutes and extract the supernatant, then The...

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Abstract

The invention discloses a titanium alloy rolling lubricating liquid based on core-shell structure SiO2 (at) Graphene quantum dots and a preparation method thereof The titanium alloy rolling lubricating liquid is specifically prepared from the following components in parts by weight: 1.5 to 2.5 parts of base oil, 1.5 to 2.5 parts of SiO2 and Graphene quantum dot powder, 90 to 96 parts of deionized water, 0.3 to 0.7 part of a surfactant, 0.8 to 1.2 parts of a dispersing agent, 0.8 to 1.2 parts of a sulfur-containing additive, 0.5 to 1.4 parts of an antioxidant and 0.5 to 1.4 parts of an auxiliary agent. The preparation method of the titanium alloy rolling lubricating liquid comprises the following steps: mixing and stirring SiO2 (at) Graphene quantum dot powder, base oil and deionized water, carrying out ultrasonic treatment, adding the dispersing agent, the sulfur-containing additive, the antioxidant and the auxiliary agent, and adjusting the pH value to alkalescence, thereby obtaining the titanium alloy rolling lubricating liquid. The SiO2 (at) Graphen core-shell structure particles are prepared by a hydrothermal method, take graphene as a core and nano silicon dioxide as a film-coated shell, and have the characteristics of high temperature resistance, lower friction coefficient and better extreme pressure resistance. The prepared rolling lubricating liquid has the advantages of being excellent in performance, lasting in efficiency and the like, and can be suitable for the field of cold rolling machining of titanium alloy ultra-thin plates.

Description

technical field [0001] The invention belongs to the technical field of machining lubrication, and in particular relates to a core-shell structure based SiO 2 Titanium alloy rolling lubricant of @Graphene quantum dots and its preparation method. Background technique [0002] When titanium alloy is rolled and deformed, a large amount of frictional heat is likely to be generated between the roll and the rolled piece, which will cause wear on the surface of the rolled piece. If the lubrication is insufficient, the surface quality of the rolled piece will be greatly damaged and the product quality will be reduced. [0003] Graphene is a new two-dimensional nanomaterial whose carbon atoms are represented by sp 2 A honeycomb-shaped two-dimensional atomic crystal stacked by hybridized monolayers, whose chemical form is similar to the surface of carbon nanotubes. The shear force between graphene sheets is small, has a lower friction coefficient than flake graphite, has excellent th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/26C10M177/00C10M173/00C10N30/06C10N30/04C10N40/24
CPCC10M125/26C10M177/00C10M173/00C10M2201/041C10M2201/105C10M2207/0215C10M2207/0225C10M2215/0425C10M2207/401C10M2207/023C10M2215/064C10M2215/06C10M2219/022C10M2219/044C10M2219/087C10M2219/108C10M2215/065C10M2217/028
Inventor 王伟朱羽张志波张卫强吴航兵张浩泽黄海广王萌
Owner KUNMING IRON & STEEL HLDG CO LTD
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