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Solid-liquid composite based on electrochemical intercalated graphite and preparation method and application thereof

A technology of composite materials and intercalated graphite, applied in the direction of graphite, base material, petroleum industry, etc., can solve the problems of changing the effect of lubricating performance, complex process, unsatisfactory, etc., and achieve high lubricating performance, simple process and high efficiency

Active Publication Date: 2017-02-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the effect of using metal ions to change the lubrication performance is sometimes unsatisfactory, and the method of using chemically prepared graphite intercalation composites is complicated and inefficient.

Method used

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  • Solid-liquid composite based on electrochemical intercalated graphite and preparation method and application thereof
  • Solid-liquid composite based on electrochemical intercalated graphite and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) using such as figure 2 The shown three-electrode electrolytic cell is prepared, graphite sheet (thickness is 0.5mm, purity > 99%, area > 2cm 2 ) as the working electrode, platinum electrode and Ag / AgCl electrode as the counter electrode and reference electrode, respectively.

[0033] 2) Preparation of electrolyte solution: Tetraoctyl ammonium bromide (C8) or tetrapentyl ammonium bromide (C5) containing different alkyl chain lengths as the intercalation electrolyte, DMSO as the intercalation solvent, and the electrolyte concentrations were 0.1M and 0.3M.

[0034] 3) Experiments were carried out by changing different electrolysis voltages for many times, and finally the most suitable electrolysis voltages for the above-mentioned C8 / C5 electrolytes were respectively -2.0V and -1.8V for constant voltage reduction reaction.

[0035] 4) The electrolysis time is 2 hours. After electrolysis, the intercalated graphite sheet is removed from the working electrode holder, and...

Embodiment 2

[0038] 1) using such as figure 2 The three-electrode electrolytic cell shown is prepared, and graphite powder (average particle diameter is 150 μm, purity > 99%) is wrapped in 500 mesh copper mesh, and copper mesh is sandwiched between two platinum sheets of working electrode clip with electrode holder, As working electrode, platinum electrode and Ag / AgCl electrode were used as counter electrode and reference electrode, respectively.

[0039] 2) Preparation of electrolyte solution: Tetraoctylammonium bromide (C8) or tetrapentylammonium bromide (C5) was used as the intercalation electrolyte, DMSO was used as the intercalation solvent, and the electrolyte concentrations were 0.3M and 0.5M, respectively.

[0040] 3) For the above two electrolytes, the electrolysis voltage is -1.5V and -1.8V respectively, and the electrolysis time is 2h. After electrolysis, take the product out of the copper grid and put it into a 50mL glass bottle, add methanol solution and wash it three times t...

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Abstract

The invention provides a solid-liquid composite based on electrochemical intercalated graphite and a preparation method and application thereof and belongs to the technical field of lubricating materials and preparation thereof. According to the composite, a graphite material serves as a body, preparation is carried out through an electrochemical three-electrode system, alkylammonium salt cations containing different carbon chain lengths and molecules of a dimethyl sulfoxide solvent are inserted between layers of the graphite material, and all the layers are periodically stacked together. The simple electrochemical synthesis method is adopted, and the method is simple in process, high in efficiency and low in influence on environments; the prepared electrochemical intercalated graphite serves as a lubricating material, and has high lubricating performance.

Description

technical field [0001] The invention relates to a solid-liquid composite lubricating material, in particular to a solid-liquid composite lubricating material based on electrochemical intercalation graphite and a preparation method thereof. Background technique [0002] Layered compounds (such as graphite, molybdenum disulfide) due to the weak van der Waals interaction between layers make the shear force smaller along the direction parallel to the basal plane and slide easily, so they are valued in the field of lubrication. At present, the main methods of using layered materials as lubricating materials include: 1) preparing layered materials into block materials with specific shapes, which are directly used for friction and lubrication interfaces; 2) directly using layered materials and other matrix materials to prepare solid composites Lubricating material; 3) adding the layered material to the liquid lubricant as a lubricating additive. [0003] How to effectively change ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M111/02C10M103/02C01B32/22
Inventor 解国新刘德娥
Owner TSINGHUA UNIV
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