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Preparation method of graphene oxide coated carbon microsphere composite material

A graphene coating and composite material technology, applied in the field of nanomaterials, can solve the problems of weak binding force and irregular morphology, and achieve the effects of strong binding energy, weak binding force improvement, and stability improvement.

Inactive Publication Date: 2019-06-21
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

However, the composite material prepared by it is not used in the lubrication field, and the composite material in Document 1 is bonded together through electrostatic interaction, the bonding force is weak, the shape is irregular, and there are many defects, so it is not suitable as a nanoparticle additive. add to lubricant

Method used

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  • Preparation method of graphene oxide coated carbon microsphere composite material
  • Preparation method of graphene oxide coated carbon microsphere composite material
  • Preparation method of graphene oxide coated carbon microsphere composite material

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preparation example Construction

[0029] A preparation method of graphene oxide coated carbon microsphere composite material, comprising the following steps:

[0030] 1) Use glucose solution as the carbon source, adjust it to acidic conditions with oxalic acid, carry out thermal reaction in hot water at 180°C for 12 hours, wash the obtained product several times, filter it with suction and dry it to obtain carbon microspheres; the concentration of glucose solution is 50mg / mL;

[0031] 2) Dissolve the carbon microspheres in a mixed solution of water and absolute ethanol (the volume ratio of deionized water and absolute ethanol is 5:4), and add 0.2 g carbon microspheres, then add the mixed solution of silane coupling agent and absolute ethanol (0.6g silane coupling agent is added in every 20mL absolute ethanol), and the mass ratio of carbon microspheres and silane coupling agent is 1:3 , and then react at room temperature or under reflux heating (60° C.) for 12 hours, wash the obtained product several times, fi...

Embodiment 1

[0037] 1) Prepare a mixed solution of glucose and oxalic acid, the concentrations of glucose and oxalic acid are 50mg / ml and 2.5mg / ml respectively, conduct hot water thermal reaction at 180°C for 12h, wash the product several times, filter it with suction, and dry it in an oven at 80°C for 12h Obtain carbon microspheres;

[0038]2) Dissolve 0.2g of dry carbon microspheres in a mixed solution of 100ml of deionized water and 80ml of absolute ethanol, add 0.6g of silane coupling agent and 20ml of absolute ethanol to prepare the mixed solution, and condense and reflux at 60°C After reacting for 12 hours, the product was washed several times, filtered with suction, and dried in an oven at 80°C for 12 hours to obtain modified carbon microspheres;

[0039] 3) 30mg graphene oxide is added in 100mlDMF, obtain graphene oxide solution, graphene oxide is prepared by Hummers method;

[0040] 4) Add 40 mg of dry modified carbon microspheres to the graphene oxide solution, and ultrasonicate...

Embodiment 2

[0043] 1) Prepare a mixed solution of glucose and oxalic acid, the concentrations of glucose and oxalic acid are 50mg / ml and 2.5mg / ml respectively, conduct hot water thermal reaction at 180°C for 12h, wash the product several times, filter it with suction, and dry it in an oven at 80°C for 12h Obtain carbon microspheres;

[0044] 2) Dissolve 0.2g of dry carbon microspheres in a mixed solution of 100ml of deionized water and 80ml of absolute ethanol, add 0.6g of silane coupling agent and 20ml of absolute ethanol to prepare the mixed solution, and condense and reflux at 60°C After reacting for 12 hours, the product was washed several times, filtered with suction, and dried in an oven at 80°C for 12 hours to obtain modified carbon microspheres;

[0045] 3) 40mg graphene oxide is added in 100mlDMF, obtain graphene oxide solution, graphene oxide is prepared by Hummers method;

[0046] 4) Add 40 mg of dry modified carbon microspheres to the graphene oxide solution, and ultrasonicat...

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Abstract

The invention discloses a preparation method of a graphene oxide coated carbon microsphere composite material. The method comprises the following steps: preparing a dextrose solution as a carbon source; performing hydrothermal reaction under an acidic condition; washing the obtained product in a plurality of times; performing suction filtering; drying to obtain carbon microspheres; dissolving thecarbon microspheres in a mixed solution consisting of water and absolute ethyl alcohol; then adding a mixed solution of a silane coupling agent and the absolute ethyl alcohol; performing condensing and reflowing under a room temperature or a heating condition; washing the obtained product in a plurality of times; performing suction filtering; drying to obtain modified carbon microspheres; adding graphene oxide to DMF; then adding an activating agent; ultrasonically treating to obtain a graphene oxide solution; adding the modified carbon microspheres to the graphene oxide solution; ultrasonically processing to obtain an uniform mixed solution A; adding a catalyst to the mixed solution A; performing condensing and reflowing under a heating condition; washing the obtained product in a plurality of times; and performing suction filtering and drying to obtain the graphene oxide coated carbon microsphere composite material.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a preparation method of a graphene oxide-coated carbon microsphere composite material. Background technique [0002] With the development of nanomaterial preparation and application technology, the research, development and application of nanomaterial-containing lubricating additives have become one of the hotspots at home and abroad. With its ultra-thin nanosheet structure, excellent thermal conductivity, self-lubricating properties, mechanical properties and good chemical stability, graphene has shown great application value in the field of high-performance lubricants. As a lubricating oil additive, it is easy to enter the friction interface, forming a stable physical isolation film, preventing the direct contact of the friction surface, thereby enhancing the bearing capacity and extreme pressure and anti-wear performance of the lubricating oil. However, due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/02C10N30/06
Inventor 费杰谷岳峰张立洁屈蒙齐樱郑欣惠罗兰李盟
Owner SHAANXI UNIV OF SCI & TECH
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