46results about How to "Improve friction reduction" patented technology

The invention discloses a preparation method of a cast nylon composite material with a high friction-reducing and anti-wear surface layer. The preparation method comprises the following steps of: preparing dispersive suspensoid by hexamethylphosphoramide, ultra-fine kaolin and toluene diisocynate in proportion; adding dispersive suspensoid and teflon micro powder to a caprolactam melt; initiating caprolactam anionic ring-opening polymerization through a sodium hydroxide-toluene diisocynate catalytic activating system; casting a reaction mass into a preheated and heat-preserved centrifugal rotating die under normal pressure; after the reacting and casting liquid is polymerized, solidified and formed, gradually cooling and demoulding, thus obtaining the cast nylon composite material with the high friction-reducing and anti-wear surface layer. The prepared cast nylon composite material has the characteristics that an inner matrix and an outer surface layer are different in structure and performance, so that the requirements on manufacturing and using various pulleys, idler wheels, rope wheels and guide wheels for a transportation mechanism, a hoisting device and mine equipment can be met.

The invention relates to a recyclable carbon quantum dot nano lubricating oil additive and a preparation method thereof, and belongs to the technical field of lubricating materials. The structure of the recyclable carbon quantum dot nano lubricating oil additive is shown as a formula I, wherein a big black spot is used for representing carbon quantum dots, R is an oxygen-containing group, and M isan amino-containing carbon chain. The carbon quantum dot nano lubricating oil additive has unique CO2 responsiveness, and by means of the CO2 responsiveness, recycling and cyclic utilization of the carbon quantum dot nano lubricating oil additive in used PAO lubricating oil can be achieved. After multiple times of recycling, the tribological properties are not obviously weakened, so that the additive has a good application prospect. The preparation and functionalization are completed in one step, the prepared carbon quantum dots with CO2 responsiveness are small in particle size and uniform in size distribution, and the preparation process is simple, easy to operate and beneficial to large-scale production.

The embodiments of the invention disclose graphene lubricating oil. The graphene lubricating oil is formed by mixing an ionic liquid, graphene and base oil, wherein a mass ratio of the ionic liquid tothe base oil is 0.0001%-1%; and a mass ratio of the graphene to the base oil is 0.001%-1%. According to the lubricating oil provided by the embodiments of the invention, after the graphene and the ionic liquid are added, the graphene is uniformly and firmly adhered to the surface of a metal to form a film having excellent lubrication and protective properties, and the graphene has very strong adsorption effects on the ionic liquid, so that the antifriction and anti-wear performance of the lubricating oil can be significantly improved, and the bearing capacity of lubricating oil can be improved.

The invention discloses a multifunctional lubricating oil additive. The multifunctional lubricating oil additive is prepared from the following raw materials in part by weight: 50-100 parts of morpholine ionic liquid, 0.8-7.5 parts of a clearing agent, 1.2-2.6 parts of an antirust agent, 7-16 parts of an antioxidant and 0.2-3.8 parts of a foam inhibitor. The multifunctional lubricating oil additive is applied to a steel/steel or steel/aluminum friction pair, thus the antifriction and abrasion-resistant performance of the lubricating oil additive in the friction pair is significantly improved,meanwhile, the extreme pressure bearing performance of the lubricating oil additive is improved, and the friction pair is small in loss and long in service life.

The invention relates to a method for preparing a milt-functional metal surface treatment additive containing boride diethanolamine phosphates, which comprises steps: diethanolamine and phosphate esterification agents are added into a reaction kettle to react, are hydrolysed and concentrated to obtain a viscous liquid, a water-carrying agent is added into the viscous liquid, a boriding agent is added to react by stirring, and the water-carrying agent is boiled up by decompressing to obtain a target product. The milt-functional metal surface treatment additive which is prepared through the method comprises 30-60% boride diethanolamine phosphates and 20-60% diethanolamine double phosphate esters. The method for preparing the milt-functional metal surface treatment additive containing the boride diethanolamine phosphates has the beneficial effects that the milt-functional metal surface treatment additive containing the boride diethanolamine phosphates has excellent antifriction, antioxidant, rust-proof and lubrication performance and the like because phosphates which are used as main components in the milt-functional metal surface treatment additive containing the boride diethanolamine phosphates contain active elements such as N, P and B and the like, is strong in anti-hydrolytic property, can improve lubricity and anti-rust property of a water-base metal working fluid by being added into the water-base metal working fluid, also can improve extreme pressure property and prolongs service life of the water-base metal working fluid simultaneously, and is an excellent multi-functional water-soluble additive.

The invention discloses a preparation method of a lubricating oil nano detergent and belongs to the technical field of preparation of lubricating oil additives. The preparation method comprises the following steps: putting nano copper powder into a fluidized bed reactor; after introducing nitrogen gas loaded with trimethyl aluminum, introducing water-containing nitrogen gas; discharging and drying to obtain cladded nano copper powder; mixing the cladded nano copper powder with a dopamine solution; then introducing air and filtering to obtain modified cladded nano copper powder; adding calcium oxide, an accelerant A, magnesium oxide, an accelerant B, a sodium silicate solution and the like and stirring at constant temperature to react; after keeping heat, naturally cooling to room temperature; discharging to obtain a mixture; mixing the mixture with petroleum ether and diluting; centrifuging and removing residues; carrying out reduced pressure distillation to obtain the lubricating oil nano detergent. The preparation method of the lubricating oil nano detergent, disclosed by the invention, has the beneficial effects that the lubricating oil nano detergent disclosed by the invention has a relatively good dispersion performance and an extreme-pressure anti-wearing performance; in a utilization process, corrosion, caused by acidic substances in a lubricating oil system, on mechanical parts can be effectively avoided.

The invention relates to a low-density environment-friendly drilling fluid capable of being repeatedly used for many times, and the low-density environment-friendly drilling fluid separately used foran upper well section and a lower well section according to the well vertical depth. The low-density environment-friendly drilling fluid is characterized by comprising a part used for the upper well section and a part used for the lower well section, wherein the part used for the upper well section is prepared from the following components by mass percent: 0.3-0.6% of a high-polymer mud shale inhibitor, 0.2-0.5% of a flocculating agent, 2-8% of a micromolecule mud shale inhibitor, 0.2-0.5% of a filtrate reducer and the balance of clear water. The part used for the lower well section is prepared from the following components by mass percent: 8-20% of a micromolecule mud shale inhibitor, 0.5-2% of filtrate reducer, 1-3% of a mud shale blocking agent, 0.1-0.3% of an adhesive improver, 0.1% ofNaOH and the balance of clear water. Through the proportion, pollution resistance of the drilling fluid is relatively strong, so that the drilling fluid has relatively good environment-friendliness,is easy to degrade, has low viscosity and high shear, reduces equipment power loss under the same viscosity, improves sand carrying ability, is good in reducing friction resistance, is low in density,and weakens mechanical anti-collapse needs by strengthening chemical anti-collapse ability.

The invention belongs to the field of diesel engines, and particularly relates to an environment-friendly antifriction and antioxidant non-sulfur phosphorus organic tungsten additive and lubricating oil containing the same. The lubricating oil is prepared by dropwise adding an aqueous ammonium tungstate pentahydrate solution into a methylbenzene solution of dihydroxy octadecylamine, heating to 90-100 DEG C, reacting for two hours, performing reduced pressure distillation, drying to obtain N-octadecyliminodiethanol tungstic diester, adding the N-octadecyliminodiethanol tungstic diester into mineral base oil and alkyl naphthalene base oil, and mixing with polymethacrylate, a non-dispersive ethylene-propylene copolymer, synthetic low-chlorine long-chain linear alkylbenzene magnesium sulfonate, overbased sulfurized calcium alkylphenol, high-molecular weight polyisobutenyl succinimide and zinc bioctyl alkyl thiophosphate; the lubricating oil is free of sulfur and phosphorus, and has environment-friendly, energy-saving, antifriction, antioxidant and precipitate-free excellent performance.

The present invention discloses a functional polymer covering liquid liquid lubricant additive, which is a polymer polymer layer on the surface of the ionic liquid on the surface of the ionic liquid, and through the polymer polymer on the polymer polymerThe surface modifier of the layer modifies the carbon -carbon dual -bond sirrius coupling agent is composed of the modified sulfonate layer of the surface of the polymer polymer layer by the cross -linked branches.The functional polymers of the present invention cover the ionic liquid liquid lubricating oil additive in the steel/steel friction vice, which significantly improves the decrease and abrasion resistance of lubricant additives in the friction sideline.Small friction and side loss and long service life.The present invention also disclosed the preparation method and application of functional polymer to cover the ionic liquid lubricant additive.

An engine oil composition including greater than 50 wt.% of a base oil of lubricating viscosity selected from a Group III, a Group IV or a Group V base oil, and mixtures thereof, 0.1-10 wt.% of a dispersant viscosity index improver that a reaction product of an olefin copolymer, an acylating agent and a polyamine, one or more calcium-containing detergents that provide from about 900 ppmw to about2500 ppmw of calcium to the engine oil composition, and one or more molybdenum-containing compounds. The engine oil composition has an SAE viscosity grade of OW-X or 5W-X, wherein X = 16, 20, 30, or 40; from about 500 ppmw to about 1000 ppmw of phosphorus; and a total sulfated ash content of no greater than 1.2 wt.%, as measured by ASTM D874. Methods of using the engine oil composition to lubricate or operate an engine are also described.