Abstract:
Provided is a laminate having at least a base material and a fine cellulose layer which includes fine cellulose having a carboxyl group, the laminate characterized in being obtained by laminating two or more of the fine cellulose layer. Also provided is a method for manufacturing a laminate, comprising the steps of (1) coating the base material with a liquid dispersion that includes fine cellulose having a carboxyl group, (2) forming a fine cellulose layer by drying the liquid dispersion used for coating, and (3) laminating fine cellulose layers by repeating steps (1) and (2).
Abstract:
The present invention provides a composition for forming a film and its resultant film which has a high level of adhesiveness to a substrate and has good gas barrier properties. The composition for forming a film is prepared by adding a silane coupling agent to an aqueous dispersion liquid in which a cellulose nanofiber is dispersed in an aqueous medium. In addition, the composition for forming a film is also prepared by blending an aqueous dispersion liquid (a) which contains a cellulose nanofiber and has a pH 4-9 with a hydrolysis liquid (b) which contains alkoxysilane hydrolysates and has a pH 2-4 by a weight ratio of “cellulose nanofiber”/“alkoxysilane (in terms of SiO2)” in the range from 0.1 to 5.
Abstract:
An improved catalyst support can be provided by a process for producing a carbon fiber composite which comprises: a step of subjecting metal fine particles of either at least one metal or a compound containing the metal to reductive deposition on fine cellulose having carboxyl groups on the crystal surface to make a composite composed of both the fine cellulose and the metal fine particles; and a step of carbonizing the fine cellulose of the composite to prepare a carbon fiber composite.
Abstract:
A method for preparing a cellulose dispersion includes oxidizing cellulose; preparing cellulose nanofibers by defibrating the oxidized cellulose; and adding a water-soluble polymer and inorganic particles to the dispersion containing the cellulose nanofibers.
Abstract:
An improved catalyst support can be provided by a process for producing a carbon fiber composite which comprises: a step of subjecting metal fine particles of either at least one metal or a compound containing the metal to reductive deposition on fine cellulose having carboxyl groups on the crystal surface to make a composite composed of both the fine cellulose and the metal fine particles; and a step of carbonizing the fine cellulose of the composite to prepare a carbon fiber composite. The invention also relates to a carbon fiber composite made by the process, a catalyst support, and a polymer electrolyte fuel cell.
Abstract:
A laminate having high adhesion between a fine cellulose layer and a base material, a method for producing the same, and a gas barrier material. The laminate is such that a fine cellulose layer containing fine cellulose having a carboxyl group is laminated on the base material, and a mixed layer in which the fine cellulose is mixed in the base material is further interposed between the base material and the fine cellulose layer. This laminate can be produced by coating the base material with a dispersion containing fine cellulose having a carboxyl group, swelling the base material with the thus coated dispersion, and drying the swollen base material and the coated dispersion. The laminate may also be produced by providing a swollen base material, coating the swollen base material with a dispersion containing fine cellulose having a carboxyl group, and drying the base material and the coated dispersion.