National Institute of Advanced Industrial Science and Technology

Toyo Tanso Co., Ltd.

Masaya Kodama

Yasushi Soneda

Keiko Nishikubo

Hiroaki Hatori

Tsuyoshi Sakaki

Toshihira Irisawa

Katsumi Kamegawa

Kinya Sakanishi

Yoshio Adachi

Takahiro Morishita

Naoko Tomita

The present application provides methods for producing polybenzimidazole carbon fiber that does not require infusibilization treatment.

Method for producing a polybenzimidazole carbon fiber

To provide a carbon fiber precursor fiber that can efficiently produce a carbon fiber excellent in mechanical strength without an infusibilization treatment; a carbon fiber; and a method for producing the carbon fiber. The carbon fiber precursor fiber includes a polymer represented by General Formula (1) below:  

Precursor fiber for carbon fibers, carbon fiber, and method for producing carbon fiber

A method for preparing a carbon microparticle from an organic raw material having lignin as a main constituent, wherein an aqueous solution with 5% total concentration of lignin and sodium hydroxide (the proportion in mass is 1:0.5) is spray-dried to prepare a complex microparticle. This complex microparticle is heat-processed under nitrogen atmosphere at 600&#xb0; C. for one hour and cooled. Thereafter, this is washed with water and further dried to prepare a hollow carbon microparticle such as those shown in FIG.(). The prepared carbon microparticle is light-weight and has an equivalent specific surface area to commercially available activated charcoal.

Carbon microparticle having lignin as raw material and preparation method therefor

A nitrogen-containing carbon porous material, which has a nitrogen content of 0.5 to 30 mass %, and which has a specific surface area of 200 to 3,000 m/g.

Nitrogen-containing porous carbon material and method of producing the same, and electric double-layer capacitor using the nitrogen-containing porous carbon material

Elastic and ultra-lightweight hollow carbon fine particles and a method for producing such hollow carbon fine particles are to be provided. In the method, fine droplets are formed from a mixed solution containing a water soluble organic substance and lithium carbonate; composite fine particles of the water soluble organic substance and the lithium carbonate are prepared by drying the fine droplets formed from the mixed solution; and the composite fine particles are decomposed at a temperature in a range of 500&#xb0; C. to 900&#xb0; C.

Growing community of inventors

Tsukuba, Japan

Masaya Kodama