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Preparation method of graphene lubricant

A kind of ene lubricant and graphene technology, applied in the field of preparation of graphene lubricant, can solve the problems of high energy consumption and complicated process, and achieve the effect of simple operation, low wear rate, simple and feasible method

Active Publication Date: 2017-02-15
SHANDONG GOLD PHOENIX
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned shortcoming of the prior art, the purpose of the present invention is to provide a kind of preparation method of graphene lubricant, overcome the multilayer graphene oxide that exists in the prior art to be discarded, or utilize the method for multilayer graphene oxide Problems such as complex process and high energy consumption

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  • Preparation method of graphene lubricant

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Embodiment 1

[0036] A kind of preparation of graphene lubricant, preparation step is:

[0037] (1) Preparation of graphene oxide ethanol colloidal suspension: first, using natural flake graphite powder as raw material, graphene oxide was prepared by Hummers oxidation method, first centrifugally cleaned with twice distilled water to neutrality, and then graphene oxide was dispersed in In water ethanol, 50 Hz ultrasonic dispersion was carried out for 20 min; wherein, the amount of absolute ethanol used for 100 mg of graphene oxide was 100 mL.

[0038] (2) Separation of graphene oxide and multilayer graphene oxide: the graphene oxide ethanol solution prepared in step (1) is placed in a high-speed centrifuge for centrifugation, centrifuged at a speed of 3000r / min for 5min, after centrifugation , separating the upper layer solution and the bottom layer precipitate, the upper layer solution is graphene oxide, and the bottom layer precipitate is multilayer graphene oxide.

[0039] (3) Dry multil...

Embodiment 2

[0044] A kind of preparation of graphene lubricant, preparation step is as embodiment 1, but different from embodiment 1 is:

[0045] In step (1), the ultrasonic dispersion power is 80 Hz, and the ultrasonic time is 10 min;

[0046] In step (2), the centrifugal time is 3min, and the centrifugal speed is 5000r / min;

[0047] In step (3), the drying temperature is 60° C., and the drying time is 48 hours;

[0048] In step (4), the mass ratio of multilayer graphene oxide to natural flake graphite is 1%.

Embodiment 3

[0050] A kind of preparation of graphene lubricant, preparation step is as embodiment 1, but different from embodiment 1 is:

[0051] Step (1) The ultrasonic dispersion power is 100Hz, and the ultrasonic time is 30min;

[0052] In step (2), the centrifugation time is 10min, and the centrifugation speed is 10000r / min;

[0053] In step (3), the drying temperature is 80° C., and the drying time is 24 hours;

[0054] Step (4) The mass ratio of multilayer graphene oxide to natural flake graphite is 5%.

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Abstract

The invention discloses a preparation method of a graphene lubricant, and relates to the technical field of an automobile friction material brake block. The method comprises the concrete steps: oxidized graphene ethanol colloid suspension liquid is prepared, single layer oxidized graphene and multilayer oxidized graphene are separated, multilayer oxidized graphene is dried, and the friction material lubricant is prepared. The preparation method of the graphene lubricant employs a rapid and simple centrifugal process to separate the single layer oxidized graphene and multilayer oxidized graphene, and the multilayer oxidized graphene is applied to the friction material lubricant; the method is simple and feasible, and operation is simple without additional investment; the multilayer oxidized graphene can be recycled and utilized, investment for processing waste is reduced, reutilization can be carried out, and the method is green, economic and environmentally friendly; the multilayer oxidized graphene and graphite powder which are obtained by separation are mixed in proportion and granulated, in order to prepare the lubricant which is used in the brake block friction material, and the brake block has a stable friction coefficient with substantially reduced wear rate.

Description

technical field [0001] The invention relates to the technical field of automobile friction material brake pads, in particular to a preparation method of a graphene lubricant. Background technique [0002] As a new type of carbon support material, graphene has excellent physical and electrical properties, so it has attracted the attention of many researchers. At present, the application research of graphene materials in supercapacitors, field emission, nanoelectronics and other fields has received extensive attention (Science 2008, 320, 356.; Nano Lett. 2008, 8, 1704.). [0003] Graphite oxide is a graphite derivative obtained by oxidizing natural graphite with a strong oxidizing agent. Graphite is oxidized to obtain graphite oxide (graphite oxide) containing carboxyl groups, hydroxyl groups on the edges, and oxygen-containing groups such as epoxy groups and carbonyl groups between the layers. This process can expand the graphite layer spacing, and then obtain graphene oxide...

Claims

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Application Information

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IPC IPC(8): C10M103/02F16D9/02C09K3/14C10N30/06
CPCC09K3/14C10M103/02C10N2030/06F16D9/02
Inventor 孟宪华甄明晖徐伟
Owner SHANDONG GOLD PHOENIX
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