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Preparation method of calcium borate/graphene oxide nano composite lubricant

A nano-composite, calcium borate technology, applied in lubricating compositions, petroleum industry, additives, etc., can solve the problems of low borate load, unfavorable industrialization, high energy consumption, etc., and achieve low cost and reduced energy consumption , The effect of simple preparation process

Active Publication Date: 2016-09-28
YANGZHOU UNIV
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Problems solved by technology

[0004] At present, the hydrothermal method is mainly used to prepare calcium borate / graphene oxide composites. This method takes a long time, consumes high energy, and the loading of borate on the graphene oxide sheet is not very high, which is not conducive to industrialization.

Method used

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  • Preparation method of calcium borate/graphene oxide nano composite lubricant

Examples

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example 1

[0027] Preparation process: Under ultrasonic conditions, borax is dispersed in deionized water to form a 0.1g / mL borax solution. Under ultrasonic conditions, disperse calcium chloride in deionized water to form a 0.1 g / mL calcium chloride solution.

[0028] 36mL of borax solution and 30mL of calcium chloride solution were mixed and stirred at 80°C for 1 hour to obtain a cloudy solution of calcium borate.

[0029] A graphene oxide (GO) aqueous solution with a concentration of 0.01 g / mL was formulated with deionized water and graphene oxide (GO).

[0030] Add 80mL of graphene oxide solution with a concentration of 0.01g / mL to the calcium borate turbid solution dropwise, stir at 60°C for 1h, transfer the mixed system to an ultrasonic tank at 60°C for 1h, and filter it with a Buchner funnel after natural cooling , the solid phase obtained by filtration was washed three times with deionized water, and finally the reactant was vacuum-dried at 60° C. for 5 h, and the product was obt...

example 2

[0034] Preparation process: Under ultrasonic conditions, borax is dispersed in deionized water to form a 0.1g / mL borax solution. Under ultrasonic conditions, disperse calcium chloride in deionized water to form a 0.1 g / mL calcium chloride solution.

[0035] 36mL of borax solution and 30mL of calcium chloride solution were mixed and stirred at 100°C for 1 hour to obtain a cloudy solution of calcium borate.

[0036] A graphene oxide (GO) aqueous solution with a concentration of 0.02 g / mL was formulated with deionized water and graphene oxide (GO).

[0037] Add 100mL of graphene oxide solution with a concentration of 0.02g / mL to the calcium borate turbid solution dropwise, stir at 50°C for 0.5h, transfer the mixed system to an ultrasonic tank at 70°C for 2h, cool naturally, and use a Buchner funnel to After filtration, the solid phase obtained by filtration was washed 4 times with deionized water, and finally the reactant was vacuum-dried at 100° C. for 6 h, and the product was ...

example 3

[0041] Preparation process: Under ultrasonic conditions, borax is dispersed in deionized water to form a 0.1g / mL borax solution. Under ultrasonic conditions, disperse calcium chloride in deionized water to form a 0.1 g / mL calcium chloride solution.

[0042] 36mL of borax solution and 30mL of calcium chloride solution were mixed and stirred at 80°C for 1 hour to obtain a cloudy solution of calcium borate.

[0043] A graphene oxide (GO) aqueous solution with a concentration of 0.01 g / mL was formulated with deionized water and graphene oxide (GO).

[0044]Add 120mL of graphene oxide solution with a concentration of 0.01g / mL to the calcium borate turbid solution dropwise, stir at 70°C for 0.5h, then transfer the mixed system to an ultrasonic pool at 80°C for 3h, cool naturally, and use a Buchner funnel to After filtration, the solid phase obtained by filtration was washed 5 times with deionized water, and finally the reactant was vacuum-dried at 100° C. for 8 hours, and the produ...

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Abstract

The invention provides a preparation method of a calcium borate / graphene oxide nano composite lubricant, relating to the technical field of lubricant preparation. The calcium borate nanoparticles are loaded onto the graphene oxide surface by liquid-phase ultrasonic mixing peeling, thereby synthesizing the calcium borate / graphene oxide nano composite lubricant. The time consumption for preparation is only 7-12 hours, thereby lowering the energy consumption, lowering the cost and enhancing the loading capacity of the calcium borate on graphene oxide sheets and the lubricating property in the base oil. When a friction test is carried out on a four-ball friction wear testing machine of which the load is 147N and the rotation speed is 1200 r / min, the friction factor of the composite lubricant prepared by the method in the base lubricating oil can be lowered by 30-50% at the maximum.

Description

technical field [0001] The invention relates to the technical field of preparation of lubricating materials, in particular to a preparation method of a composite lubricating material formed of calcium borate and graphene oxide nanometers. Background technique [0002] As a derivative of graphene, graphene oxide has become a popular research material in current science due to its strong hydrophilicity and low preparation cost. Due to the special layered structure of graphene oxide and its strong hardness, the use of graphene oxide as a lubricating material can significantly reduce its friction coefficient and improve wear resistance, and has great application prospects in tribological applications. Lin et al. modified graphene oxide with oleic acid and stearic acid to make it easy to disperse in lubricating base oil, and found that the lubricating base oil with modified graphene oxide showed better anti-friction and anti-wear properties [Lin J, Wang L, Chen G. Modification o...

Claims

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Application Information

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IPC IPC(8): C10M125/00C10N30/06
CPCC10M125/02C10M125/26C10N2030/06
Inventor 程志林李伟
Owner YANGZHOU UNIV
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