Showa Denko K.k.

Resonac Corporation

Mitsubishi Corporation

Yu Gao

Masumi Kuritani

Ryuji Monden

Takeshi Igarashi

Kunio Kondo

Tomoyuki Takei

A fullerene-containing lubricating oil composition including a base oil and fullerene, wherein the fullerene is dissolved, and the concentration is 1 ppm by mass or more and less than 50 ppm by mass.

Fullerene-containing lubricating oil composition and method for producing same

By sequentially performing: a step (I) of dissolving fullerene Cin a polyalkylene glycol to prepare a fullerene solution; a step (II) of immersing a material carbon fiber in the fullerene solution; and a step (III) of extracting the carbon fiber from the fullerene solution, washing the extracted carbon fiber with water, and drying the carbon fiber washed with water, a carbon fiber on which fullerene Cadsorbs is obtained.

Carbon fiber and method of manufacturing same

By sequentially performing: a step (I) of dissolving fullerene Cin an organic solvent to prepare a fullerene solution; a step (II) of immersing a material carbon fiber in the fullerene solution; and a step (III) of extracting the carbon fiber from the fullerene solution and drying the extracted carbon fiber, a carbon fiber on which fullerene Cadsorbs is obtained.

A carbon fiber is obtained by sequentially performing: a step (I) of dissolving a fullerene mixture including fullerenes Cand Cin an organic solvent to prepare a fullerene solution; a step (II) of immersing a material carbon fiber in the fullerene solution; and a step (III) of extracting the carbon fiber from the fullerene solution and drying the extracted carbon fiber.

A method for producing a lubricating oil composition includes: a step of mixing a base oil and fullerene, dissolving a soluble component of the fullerene in the base oil, and obtaining a mixture of the base oil and fullerene; a step of removing an insoluble component included in the mixture and obtaining a fullerene solution; and a step of heat-treating the fullerene solution.

Lubricating oil composition and method for producing same

A method for inspecting a lubricant oil composition containing a base oil and a fullerene, the method including: measuring at least one of a lamellar length of the lubricating oil composition and a most abundant diameter in a particle size distribution obtained by a dynamic light scattering method, and selecting the lubricating oil composition whose measured value is within a set range.

Method for inspecting lubricating oil composition and method for producing lubricating oil composition

The lubricating oil composition includes a base oil and a fullerene adduct.

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Tokyo, Japan

Yu Gao