A kind of functional lubricating oil additive and its preparation method and application
A lubricating oil additive and functional technology, applied in the field of lubricating oil, can solve the problems of reduced friction coefficient, poor dispersion stability, and insufficiently low, and achieve the effects of simple preparation process, excellent anti-friction and anti-wear performance, and easy availability of raw materials
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Embodiment 1
[0024] (1) Graphene oxide prepared by the improved Hummers method was used as a raw material to prepare 160 g of an aqueous dispersion of graphene oxide with a concentration of 0.025 wt%. Then, 6 mL of silane coupling agent (A-1100) was added and stirred at room temperature for 1 h. Finally, it was transferred to a flask and reacted at 80°C for 2h. Let stand to cool, centrifuge, wash with water and add appropriate amount of deionized water to obtain a water dispersion of functional graphene oxide.
[0025] (2) Weigh 0.04g of boron nitride and add water and stir evenly to obtain the aqueous dispersion of boron nitride, add 6mL of silane coupling agent (A-1100) at room temperature and stir for 1h, heat and react at 80°C for 2h, centrifuge and wash with water to obtain Modified boron nitride.
[0026] (3) Take the above-mentioned modified boron nitride, 0.16g montmorillonite and the above-mentioned functional graphene oxide aqueous dispersion and mix and stir for 1h; transfer t...
Embodiment 2
[0030] (1) Graphene oxide prepared by the improved Hummers method was used as a raw material to prepare 160 g of an aqueous dispersion of graphene oxide with a concentration of 0.025 wt%. Then, 1 mL of silane coupling agent (A-1110) was added and reacted at 25° C. for 5 h. Let stand to cool, centrifuge, wash with water and add appropriate amount of deionized water to obtain a water dispersion of functional graphene oxide.
[0031] (2) Weigh 0.01g of boron nitride and add water to stir and disperse evenly to obtain an aqueous dispersion of boron nitride, add 0.5mL of silane coupling agent (A-1110) to react at room temperature for 8 hours, centrifuge and wash with water to obtain a modified nitride boron.
[0032] (3) Take the above-mentioned modified boron nitride, 0.02g montmorillonite and the above-mentioned functional graphene oxide aqueous dispersion and mix and stir for 0.5h; transfer to the reaction kettle for 200°C hydrothermal reaction for 1h, let stand and cool; centr...
Embodiment 3
[0036] (1) Graphene oxide prepared by an improved Hummers method was used as a raw material to prepare 160 g of an ethanol dispersion of graphene oxide with a concentration of 0.025 wt%. Then, 8 mL of silane coupling agent (A-1120) was added, and the mixture was refluxed at 80° C. for 1 h. After washing with water and ethanol, an appropriate amount of ethanol is added to obtain an ethanol dispersion of functional graphene oxide.
[0037] (2) Weigh 0.16g of boron nitride and add ethanol to stir and disperse evenly to obtain ethanol dispersion of boron nitride, add 16mL of silane coupling agent (A-1120), reflux at 60°C for 3h, centrifuge and wash with water to obtain modified boron nitride.
[0038] (3) Take the above-mentioned modified boron nitride, 0.32g montmorillonite and the ethanol dispersion of the above-mentioned functional graphene oxide and mix and stir for 2h; Wash with ethanol and dry to obtain functional graphene / modified boron nitride / montmorillonite ternary com...
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