Nippon Paper Industries Co., Ltd.

Teijin Limited

Satoshi Takaichi

Takeshi Nakayama

Shinji Sato

Takeshi Fujii

Shinichi Onogi

Kenichiro Sasaki

Masahiro Morita

Takeshi Nakatani

Yusuke Tada

Makoto Matsumoto

Masato Yamaguchi

Sadakazu Matsubara

Hiroshi Shinkura

Masato Sugano

Masanari Takahashi

Riichi Muramatsu

Naoyuki Tamura

An object is to provide an acid-type carboxymethylated cellulose nanofiber in which the viscosity is not excessively high at the time of preparing a dispersion liquid and the introduced carboxymethyl group is desalted to convert the acid type, and the acid-type carboxymethylated cellulose nanofiber has 0.01 to 0.50 of the degree of substitution with carboxymethyl group per glucose unit, wherein the B-type viscosity in an aqueous dispersion with a concentration of 0.95 to 1.05% by mass is 1000 mPa&#xb7;s or more under the condition of 60 rpm and 20&#xb0; C., and 7000 mPa&#xb7;s or more under the condition of 6 rpm and 20&#xb0; C.

Acid-type carboxymethylated cellulose nanofiber and production method thereof

The present invention intends to provide an acid type carboxylated cellulose nanofiber having a high viscosity in a low shear region, or to provide an acid type carboxylated cellulose nanofiber having a very short fiber length, and the acid type carboxylated cellulose nanofiber has a carboxy group at least in part of a constituent unit constituting a cellulose molecular chain, wherein a viscosity of water dispersion with a content from 0.95 to 1.05% by mass is 400 Pa&#xb7;s or higher at a shear velocity from 0.003 to 0.01 sat 30&#xb0; C., or an average fiber length is from 50 to 500 nm and a ratio of fibers having a fiber length of 300 nm or shorter is 50% or higher.

Acid type carboxylated cellulose nanofiber

A cellulose nanofiber with little contaminants and a high transparency is provided. A filtration method of a cellulose nanofiber dispersion including a step of filtering a cellulose nanofiber dispersion under elevated or reduced pressure by at least one of the filtration processes: (A) a filtration process using a filter aid; (B) a filtration process using a filter media selected from the group consisting of a metal porous filter media, an inorganic material porous filter media, and a polymer porous filter media; and (C) a filtration process using both the filter aid and the filter media.

Filtration method and production process of cellulose nanofiber dispersion

The present invention provides a dispersion liquid of anion-modified cellulose nanofibers and a composition of anion-modified cellulose nanofibers that are not colored when heated. Specifically, the dispersion liquid contains anion-modified cellulose nanofibers; an anti-coloring agent selected from the group consisting of borate salts and sulfite salts, or combinations thereof in an amount of 1 to 30 mass % based on an absolute dry mass of the anion-modified cellulose nanofibers; and a solvent.

Anion-modified cellulose nanofiber dispersion liquid and composition

An oxygen-concentrating equipment comprising an oxygen-concentrating means for separating oxygen from air and concentrating the oxygen, a humidifying means for humidifying the oxygen-concentrated air produced by said oxygen-concentrating means, and an oxygen-supplying means for supplying the humidified oxygen-concentrated air to a user, characterized in that said humidifying means has at least a cation-conducting solid electrolyte membrane equipped with electrodes on both the sides of the membrane and an electric source for applying an electric current to said electrodes.

Oxygen concentrating apparatus

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Tokyo, Japan

Satoshi Takaichi