Preparation method for depositing graphite lubricant coating with high consistent orientation under electric field induction
An electric field-induced, graphite lubrication technology, applied in the direction of engine lubrication, lubricating composition, petroleum industry, etc., can solve the problems of increased friction coefficient, inconsistent orientation of graphite monolayer, fragmentation, etc., achieves highly consistent orientation, simple preparation method, The effect of improving friction properties
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Embodiment 1
[0022] Add 1g of graphite powder and 0.5g of sodium nitrate solid mixture to 23ml of concentrated sulfuric acid (98wt%) in an ice bath, magnetically stir and slowly add 3g of potassium permanganate, keep warm at 10°C for 2 hours, remove from the ice bath and stir for 5 hours , and then the sample was diluted with 5wt% sulfuric acid, stirred for 2 hours and then added with 3ml H 2 o 2 The solution turned bright yellow. After filtering, it was washed repeatedly with dilute hydrochloric acid, and finally washed with distilled water until the pH value was approximately equal to 7. Add yellow-brown graphite oxide into a beaker and use deionized water to prepare a 0.2g / L suspension, use an ultrasonic cleaner to sonicate for 30min at a power of 200w, and centrifuge to remove a small amount of impurities in it to obtain a good-quality graphene oxide precipitate. The above-mentioned graphene oxide is ultrasonically dispersed in ethanol to form a graphene oxide colloidal suspension wit...
Embodiment 2
[0024] Add 1g of graphite powder and 0.5g of sodium nitrate solid mixture to 23ml of concentrated sulfuric acid (98wt%) in an ice bath, magnetically stir and slowly add 3g of potassium permanganate, keep warm at 10°C for 2 hours, remove from the ice bath and stir for 5 hours , and then the sample was diluted with 5wt% sulfuric acid, stirred for 2 hours and then added with 3ml H 2 o 2 The solution turned bright yellow. After filtering, it was washed repeatedly with dilute hydrochloric acid, and finally washed with distilled water until the pH value was approximately equal to 7. Add yellow-brown graphite oxide into a beaker to prepare a 0.2g / L suspension, use an ultrasonic cleaner to sonicate for 30min at a power of 200w, and centrifuge to remove a small amount of impurities, and obtain a good-quality graphene oxide precipitate.
[0025] The obtained graphene oxide was dispersed into an aqueous solution, added with 0.5 mL of hydrazine hydrate, reacted at a constant temperature ...
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