Daicel Corporation

Daikin Industries, Ltd.

Daisuke Shiro

Atsushi Kume

Masaru Tanaka

Hideki Matsuura

Takeru Kashiwagi

Hidekazu Takeuchi

Arisa Kawae

Hisayoshi Ito

Shogo Moroe

Provided is a composition for a refrigeration machine capable of reducing a friction coefficient in friction between sliding members in a refrigeration machine, and a composition kit for a refrigeration machine for providing the composition for a refrigeration machine. A composition for a refrigeration machine of the present disclosure includes a refrigeration machine oil, nanodiamond particles dispersed in the refrigeration machine oil, and a dispersant. The refrigeration machine oil preferably contains a polyvinyl ether, a polyol ester, a polyalkylene glycol, an alkylbenzene, or a mineral oil. The composition kit for a refrigeration machine of the present disclosure includes a refrigeration machine oil (A) containing a base oil and nanodiamond particles dispersed in the base oil, and a refrigerant (B).

Composition for refrigeration machine and composition kit for refrigeration machine

Provided is a polyoxyalkylene-chain surface-modified nanodiamond that is excellent in safety during production and in productivity. A surface-modified nanodiamond according to the present invention includes a nanodiamond particle and a surface-modifying group having a polyoxyalkylene chain and a silicon atom, the surface-modifying group surface-modifying the nanodiamond particle. A nanodiamond dispersion composition according to the present invention includes a dispersion medium and the surface-modified nanodiamond dispersed in the dispersion medium.

Surface-modified nanodiamond, nanodiamond dispersion composition, and surface-modified nanodiamond production method

Provided is a surface-modified nanodiamond that has high dispersibility in an organic solvent or in a resin and that can maintain the characteristics described above even in a high-temperature environment of 200° C. or higher. The surface-modified nanodiamond according to an embodiment of the present invention has a structure in which a surface of a nanodiamond particle is modified by a group represented by Formula (1) below. In the formula, Rto Rare the same or different and each represent an aliphatic hydrocarbon group having from 1 to 25 carbons. Note that at least one of Rto Ris an aliphatic hydrocarbon group having from 10 to 25 carbons. Furthermore, an atomic bond of the carbon atom in the formula bonds to the surface of the nanodiamond particle.

Surface-modified nanodiamond, liquid dispersion containing surface-modified nanodiamond, and composite material

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Tokyo, Japan

Daisuke Shiro