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Friction Modifier
Friction Modifier
Friction Modifier
At present, there are various types of friction improvers additives, among which the main types include organic friction modifiers (OFMs), oil-soluble organic molybdenum additives, functionalized polymers, and dispersed nanoparticles.
OFMs are amphiphilic surfactants, such as fatty acids, which usually come from fats and vegetable oils. OFMs are important additives in modern engine oils and are also used in fuels. [1] They adsorb onto metal surfaces and self-assemble to form an incompressible monolayer, thereby preventing sharp contact and reducing friction and wear.
Organic molybdenum compounds were initially developed as anti-wear additives, but were later proven to be very effective in reducing boundary friction. [3] They are currently used in many engine oils and have also been applied in recent gear oils. They reduce friction by forming a two-dimensional molybdenum sulfide layer on the friction surfaces.
Functionalized polymers can be customized to specifically adsorb on polar surfaces and have been proven to significantly reduce friction and wear.
Dispersed nanoparticles have been shown to reduce boundary friction, but they have not yet been widely adopted in industrial applications.
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