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Method for preparing modified graphene oxide anti-wear agent

A technology of oxide stone and anti-wear agent, used in additives, petroleum industry, lubricating compositions, etc., can solve the problems of high addition amount, poor mixing uniformity, low utilization rate, etc. Effect

Active Publication Date: 2014-09-03
扬州智创企业运营管理服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of ultrafine graphite and molybdenum disulfide powder used is micron size, and the disadvantages are poor mixing uniformity, low utilization rate and high addition amount

Method used

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  • Method for preparing modified graphene oxide anti-wear agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 1.2g of graphene oxide and 3.6g of boric acid into a 250mL three-necked flask, then add 30ml of petroleum ether, stir and add 0.024g of concentrated sulfuric acid, heat up to 60°C for reflux for 8h, and then distill off the solvent. The product was dried in a vacuum oven at 80°C to obtain an off-white solid, which was boric acid-modified graphene oxide. Adding it to ordinary lubricating grease at a ratio of 0.05%, the wear spot diameter is reduced from 0.96 of the blank grease to 0.38, the wear rate is reduced by 60%, the friction coefficient is reduced from 0.106 of the blank grease to 0.04, and the friction coefficient is reduced by 60%.

[0020] Graphene oxide is prepared by the Hummers method, which belongs to the prior art, so the specific preparation method is omitted.

Embodiment 2

[0022] Add 1g of graphene oxide and 0.5g of calcium borate into a 250mL three-neck flask, then add 70ml of n-hexane, stir and heat to 60°C, add 0.005g of concentrated sulfuric acid dropwise, continue to heat up to 150°C, condense and reflux for 2h, and then distill off the solvent. The product was dried in a vacuum oven at 20°C to obtain an off-white solid, which was calcium borate-modified graphene oxide. Adding 0.5% to ordinary grease, the wear spot diameter is reduced from 0.96 of blank grease to 0.20, the wear rate is reduced by 80%, the friction coefficient is reduced from 0.106 of blank grease to 0.02, and the friction coefficient is reduced by 80%.

Embodiment 3

[0024] Add 1g of graphene oxide and 1.5g of lanthanum borate into a 250mL three-neck flask, then add 50ml of ethanol, stir and heat to 80°C, add 0.020g of concentrated sulfuric acid, continue to heat up to 130°C, condense and reflux for 5h, and then distill off the solvent. The product was dried in a vacuum oven at 60°C to obtain an off-white solid which was lanthanum borate graphene oxide. Adding it to ordinary lubricating grease at a ratio of 0.1%, the wear scar diameter is reduced from 0.96 of the blank grease to 0.28, the wear rate is reduced by about 70%, the friction coefficient is reduced from 0.106 of the blank grease to 0.04, and the friction coefficient is reduced by about 60%.

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Abstract

The invention relates to a method for preparing a modified graphene oxide anti-wear agent. The method disclosed by the invention comprises the following steps: adding graphene oxide and a compound containing boron, molybdenum, calcium, copper and rare earth elements into a three-mouth flask, adding an organic solvent into the container, stirring, heating, adding concentrated sulphuric acid serving as a catalyst to react, heating to the boiling point temperature of the solvent to evaporate the solvent, putting the product into a vacuum drying oven to obtain the modified graphene oxide anti-wear agent. The method disclosed by the invention has the advantages that the problems that oily lubricants and solid lubricants are high in cost, strict in service condition, troublesome in replacement, not friendly to environment due to produced wastes and the like are solved; by utilizing the characteristics that the graphene oxide is ultrathin, ultrahard, ultra lubricative and resistant to corrosion and high temperature, the novel anti-wear agent with excellent performances is prepared through the surface modification of the elements with the anti-wear property; by means of the product, the lubricating property of the lubricants can be remarkably improved, the friction and the wear of the mechanical movement surface are reduced by a big margin and the efficacies of saving material and energy are provided.

Description

technical field [0001] The invention belongs to the technical field of lubrication, in particular to a preparation method of a modified graphene oxide antiwear agent. Background technique [0002] According to the statistics of international authoritative organizations, the three major losses of metal material wear, corrosion and fatigue account for about 30% of the total industrial output value, and friction and wear are ubiquitous natural phenomena. Friction loses about one-third of the world's primary energy. Wear is one of the three main forms of damage and failure of materials and equipment. Lubrication is the most effective technology to reduce friction and reduce or avoid wear. The development has good wear resistance, high bearing capacity, and has a certain repair function on the worn surface. According to the statistics of international authoritative organizations, the three major losses of metal materials, wear, corrosion, and fatigue account for about 30% of the ...

Claims

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Application Information

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IPC IPC(8): C10M125/00C10M125/02C10N30/06
Inventor 程志林李伟秦茜茜刘赞
Owner 扬州智创企业运营管理服务有限公司
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