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Preparation method of octadecylamine functionalized graphene oxide lubricating oil for hoisting cable used in mine
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An octadecylamine functional, lubricating oil technology, applied in the petroleum industry, lubricating compositions, additives, etc., can solve the problems of easy settling and agglomeration, limited application, difficult chemical modification, etc., and achieves simple steps and high operability. Effect
Inactive Publication Date: 2021-08-03
CHINA UNIV OF MINING & TECH
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[0003] Graphene is an excellent anti-friction material, which can effectively reduce the adhesion and friction between the contact surfaces. However, due to the chemical inertness of graphene and the mutual stacking effect of π-π bonds between layers, it is difficult to chemically modify it. Furthermore, it is very easy to settle and agglomerate in lubricating oil, which limits its application in lubricating oil
The surface of graphene oxide contains many oxygen-containing functional groups, which provides the possibility of its chemical modification. Some scholars have improved its dispersion stability in non-polar hydrocarbon solvents by grafting lipophilic groups on the surface of graphene oxide, but few Rarely add modified materials directly to refined oil
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Embodiment 1
[0027] (1) Add 500mg of GO into a conical flask containing 500ml of NMP solution, stir magnetically for 30min and then ultrasonically disperse for 30min to ensure complete dispersion of GO in NMP;
[0028] (2) Add 100mg HoAt, 500mg EDCI, and stir magnetically at 60-80°C for 30min;
[0029] (3) Add 2g ODA, heat up to 90-100°C and stir continuously for 24h;
[0030] (4) After the reaction, the precipitate was centrifuged and washed with hot absolute ethanol several times, and dried in vacuum at 80°C for 12 hours, and the obtained black product was ODA-GO;
[0031] (5) Grinding the dried ODA-GO with a ball mill for subsequent use.
[0032] The ODA-GO powder prepared in Example 1 was characterized for its chemical structure and surface morphology. figure 1 is the infrared absorption spectrum of GO and ODA-GO, the position and mode shape of the characteristic absorption peaks have been marked on the figure, and the meaning of each symbol is: υ s is the symmetrical stretching vib...
Embodiment 2
[0035] (1) Add 100g mine hoist wire rope lubricating oil IRIS-550A into a clean beaker;
[0036] (2) Weigh 0.05g of GO powder into a beaker, put the beaker into a magnetic stirrer, heat it in a water bath to no more than 50°C, and stir continuously at a rate of 1000r / min for 30min;
[0037] (3) Transfer the beaker to an ultrasonic cleaner heated to no more than 50°C, and ultrasonically disperse at a frequency of 40kHz for 30min;
[0038](4) The beaker was taken out and cooled to room temperature to obtain mine hoist wire rope modified lubricating oil with a GO dispersion concentration of 0.05 wt%, which was GO modified oil_0.05 wt%.
Embodiment 3
[0040] (1) Add 100g mine hoist wire rope lubricating oil IRIS-550A into a clean beaker;
[0041] (2) Weigh 0.025g of ODA-GO powder into a beaker, put the beaker into a magnetic stirrer, heat it in a water bath to no more than 50°C, and stir continuously at a rate of 1000r / min for 30min;
[0042] (3) Transfer the beaker to an ultrasonic cleaner heated to no more than 50°C, and ultrasonically disperse at a frequency of 40kHz for 30min;
[0043] (4) The beaker was taken out and cooled to room temperature to obtain mine hoisting wire rope modified lubricating oil with ODA-GO dispersion concentration of 0.025wt%, namely ODA-GO modified oil_0.025wt%.
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Abstract
The invention discloses a preparation method of octadecylamine-functionalized grapheneoxide lubricating oil for a hoisting cable used in a mine. The preparation method comprises the following steps: preparing octadecylamine-functionalized grapheneoxide (ODA-GO) by adopting a dehydration condensation method; adding the ODA-GO into non-polar finished lubricating oil, and conducting continuous stirring; and ultrasonically dispersing a mixture obtained in the previous step, and cooling an oil sample to obtain the modified lubricating oil. An evaluation method for the performance of the modified steel cable lubricating oil comprises the following steps: (1) testing extreme pressure performance and antiwear and antifriction performance of the modified lubricating oil by using a four-ball machine; and (2) carrying out a friction-wear test on the steel cable by using a self-made steel cable sliding friction-wear test device, and analyzing the anti-wear and anti-friction characteristics of the ODA-GO modified oil according to an inter-cable friction coefficient and a wear area. The method is simple in step and high in operability; a graphene-based material is stably dispersed in the non-polar finished lubricating oil, and the lubricating capacity of the original lubricating oil is improved; and the abrasion of the surface of the steel cable is effectively reduced at a low speed or a high load.
Description
technical field [0001] The invention relates to a preparation method of octadecylamine functionalized grapheneoxide lubricating oil for hoisting steel wire ropes in mines. Background technique [0002] At present, the mine hoisting system is developing towards large-scale. The end load of the multi-layer winding hoisting wire rope in the mine can reach more than 110 tons. The hoisting wire rope belongs to the line contact wirerope, and the contact stress on the surface of the wire rope is relatively large. However, the operating environment of the shaft of the mine hoist is harsh, and the lubricating oil on the surface of the wire rope is prone to failure, resulting in serious friction and wear of the wire rope, which directly threatens the service life of the wire rope and the safety and reliability of mine hoisting. Therefore, it is urgent to modify the existing hoisting wire rope lubricating oil to improve its lubricating performance, and provide important basic data an...
Claims
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