Hokkaido University

Other

Kuraray Co., Ltd.

Chakyu Dyeing Co., Ltd.

The University of Tokyo

Japan Science and Technology Corporation

Mitsui Co., Ltd.

Tsuchiya Tsco Co., Ltd.

Furusho, Naoyuki

Morimoto, Akio

Bunshi Fugetsu

Eiji Akiba

Masaaki Hachiya

Katsuyoshi Kondoh

Hidetaka Yamauchi

Ichiro Sakata

Akio Morimoto

Takayuki Ueki

Naoyuki Furusho

Akiba Eiji

Hachiya Masaaki

A carbon fiber reinforced composite material includes carbon fiber and a thermosetting resin composition. The thermosetting resin composition is a cured product of a liquid composition that contains unsaturated polyester, a curing agent, a polymerization initiator, and a nanocarbon/nanocellulose complex containing nanocarbon modified by functional a group and nanocellulose. The nanocarbon/nanocellulose complex is dispersed in the thermosetting resin composition. The thermosetting resin composition contains 0.05 to 15% by weight of the nanocarbon/nanocellulose complex. A maximum point stress of the carbon fiber reinforced composite material in a tensile test according to JIS K 7164 is 410 N/mmor more. A maximum point stress of the carbon fiber reinforced composite material in a three-point bending test according to JIS K 7171 is 310 N/mmor more.

Carbon fiber reinforced composite material

Electro-conductive fibers comprise synthetic fibers and an electro-conductive layer containing carbon nanotubes and covering a surface of the synthetic fibers, and the coverage of the electro-conductive layer relative to the whole surface of the synthetic fibers is not less than 60% (particularly not less than 90%). The electric resistance value of the electro-conductive fibers ranges from 1&#xd7;10to 1&#xd7;10&#x3a9;/cm, and the standard deviation of the logarithm of the electric resistance value is less than 1.0. The thickness of the electro-conductive layer ranges from 0.1 to 5 &#x3bc;m, and the ratio of the carbon nanotubes may be 0.1 to 50 parts by mass relative to 100 parts by mass of the synthetic fibers. The electro-conductive layer may further contain a binder. The electro-conductive fibers may be produced by immersing the synthetic fibers in a dispersion with vibrating the synthetic fibers to form the electro-conductive layer adhered to the surface of the synthetic fibers. The electro-conductive fibers have the carbon nanotubes homogeneously and firmly adhered to an almost whole of a surface thereof and have an electro-conductivity and a softness.

Electro-conductive fibers with carbon nanotubes adhered thereto, electro-conductive yarn, fibers structural object, and production processes thereof

[Means for solving]A graphene oxide sheet which changes to a substance having a graphene structure when reduced, and which is obtainable by dispersing a graphene-containing carbon substance using a dispersant to reduce the size of the aggregate units of the graphene-containing carbon substance, and then oxidizing the graphene-containing carbon substance.

Graphene oxide sheet, article containing graphene-containing substance produced by reducing the graphene oxide sheet, and process for production of the graphene oxide sheet

An electro-conductive multifilament yarn for an electro-conductive brush that includes an electro-conductive fiber containing a synthetic fiber and a carbon nanotube covering a surface of the fiber. The synthetic fiber may have a single-filament fineness of not more than 30 dtex. The synthetic fiber may have 3 to 6 elongated recesses or grooves extending in a longitudinal direction thereof and have a multi-leaves or cross-section.

Electro-conductive multifilament yarn and electro-conductive brush

The disclosed is a redispersible agglomerate of fine carbon fibers, which is obtained by adding the fine carbon fibers and a dispersing agent which shows solid state at least at ordinary temperature (20&#xb1;10&#xb0; C.) into an aqueous dispersion medium, and then removing the dispersion medium from a dispersion system where the carbon fibers are isolated individually and dispersed in the dispersion medium; and in which the carbon fibers are got together and solidified in the agglomerate while each carbon fiber maintains its isolated dispersibility; This redispersible agglomerate of fine carbon fibers has a good handling property and would form a dispersed state of individually isolated carbon fibers when it is added in any of various dispersion media.

Redispersible agglomerate of fine carbon fibers and method for producing thereof

A method for producing a composite metal material includes preparing a solution containing a surfactant having both hydrophilicity and hydrophobicity, dispersing a nanosized to micro-sized fine carbonaceous substance into a state of being monodispersed in the solution, bringing the solution having the dispersed fine carbonaceous substance into contact with surface of a metal powder particle, drying the metal powder particle to make the fine carbonaceous substance in the monodispersed state adhere to the surface of the metal powder particle via a component of the solution, and thermally decomposing and removing the solution component adhering to the surface of the metal powder particle by heat-treating the metal powder particle either in a hydrogen-containing reducing atmosphere or in a vacuum atmosphere to partially expose the surface of the metal powder particle out of the adhering fine carbonaceous substance, and thus progress diffusion and sintering among the metal powder particles through exposed parts.

Composite metal material and method for producing the same

A method for the separation of hydrogen ion, characterized in that a substance having a conjugate base (A ) of an acid (HA) as a functional group is used as a stationary phase, and an electrolyte containing a cation having a larger ion exchanging force than that of hydrogen ion is used as an eluent. The method allows the selective separation of hydrogen ion and the quantitative analysis thereof with high precision.

Method for separating and analyzing hydrogen ion and ion chromatographic instrument

Growing community of inventors

Sapporo, Japan

Bunshi Fugetsu