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公开(公告)号：US20200087417A1
公开(公告)日：2020-03-19
申请号：US16471798
申请日：2017-11-02
发明人： Satoshi TAKAICHI , Takeshi NAKATANI , Masahiro MORITA , Shinichi ONOGI , Takeshi FUJII , Kenichiro SASAKI , Makoto MATSUMOTO , Takeshi NAKAYAMA
摘要： 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·s or higher at a shear velocity from 0.003 to 0.01 s−1 at 30° 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.
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公开(公告)号：US20180318740A1
公开(公告)日：2018-11-08
申请号：US15772126
申请日：2016-11-02
CPC分类号： B01D37/02 , B01D2239/1216 , B01D2239/1241 , B01D2257/80 , B82Y40/00 , C08B15/08 , C08J2301/02 , D21C9/18 , D21H11/18
摘要： 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.
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公开(公告)号：US20190330767A1
公开(公告)日：2019-10-31
申请号：US16471375
申请日：2017-11-02
摘要： 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·s or more under the condition of 60 rpm and 20° C., and 7000 mPa·s or more under the condition of 6 rpm and 20° C.
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