Yokogawa Electric Corporation

Asahi Kasei Kabushiki Kaisha

Nippon Soda Co., Ltd.

Futamura Kagaku Kabushiki Kaisha

Kri, Inc.

Olympus Corporation

Lianzhen Lin

Hiroshi Suzuki

Ayako Maruta

Masanori Hori

Hideki Yamaguchi

Yoshitaka Fujita

Satoru Abe

Kohei Shiramizu

Kaname Tsuchii

Sulfate ester modified cellulose nanofibers having an average fiber diameter in the range of 1 nm to 500 nm, and having sulfate ester modified hydroxyl groups on surfaces of the cellulose nanofibers. A method of producing cellulose nanofibers that are nanosized, that have a high crystallinity degree, and that have large aspect ratios, the method being a chemical method that does not require any physical pulverization, that is energy-saving, and that can be performed under mild reaction conditions. A method of producing modified cellulose nanofibers including modifying the surfaces of the cellulose nanofibers through esterification or urethanization. A method of producing cellulose nanofibers includes impregnating cellulose with a fibrillation solution containing dimethylsulfoxide, at least one carboxylic acid anhydride selected from acetic anhydride and propionic anhydride, and sulfuric acid to fibrillate the cellulose.

Sulfate ester modified cellulose nanofibers and method for producing cellulose nanofibers

Provided is a method of producing fine cellulose fibers that are nanosized, that have a high crystallinity degree, and that are less vulnerable to fiber shape damage, the method including impregnating cellulose with a fibrillation solution to fibrillate the cellulose without mechanical crushing, and modifying the cellulose. The method of producing cellulose microfibrils of the present invention includes impregnating cellulose with a fibrillation solution containing a carboxylic acid vinyl ester or an aldehyde and an aprotic solvent having a donor number of 26 or more to fibrillate the cellulose. The aldehyde is at least one kind of aldehyde selected from the group consisting of an aldehyde represented by the following formula (1), paraformaldehyde, cinnamaldehyde, perillaldehyde, vanillin, and glyoxal:R&#x2014;CHO&#x2003;&#x2003;(1)where Rrepresents a hydrogen atom, an alkyl group having 1 to 16 carbon atoms, an alkenyl group, a cycloalkyl group, or an aryl group.

Fine cellulose fiber and production method for same

There is provided a solvent that can uniformly dissolve a polysaccharide within a short time period regardless of the crystal form of the polysaccharide and without requiring any special pretreatment. The solvent includes a tetraalkylammonium acetate represented by the below-indicated formula; and an aprotic polar solvent. A content of the aprotic polar solvent is 35 wt % or more. In the formula, R, R, R, and Reach independently represent an alkyl group having 3 to 6 carbon atoms.

Solvent used for dissolving polysaccharide and method for manufacturing molded article and polysaccharide derivative using this solvent

It is to provide a silsesquioxane having &#x3b1;,&#x3b2;-diol group, and to provide an organic-inorganic hybrid resin composition comprising silsesquioxane and hydroxyalkyl cellulose. A composition comprising a cage-type structure of silsesquioxane represented by general formula (A), and a partially cleaved cage-type structure of silsesquioxane represented by general formula (B);(RSiO)&#x2003;&#x2003;(A)(RSiO)(RSiOH)&#x2003;&#x2003;(B)[wherein in formulae (A) and (B), l and m represent an integer of 4 or more, n represents an integer of 1 or more, and n/(l+m) is 0.03 to 0.2; each R may be the same or different, and represents an alkoxy group with 1 to 10 carbons, etc.; wherein at least one R in one molecule is a group having &#x3b1;,&#x3b2;-diol group, and when the number of groups having &#x3b1;,&#x3b2;-diol is 2 or more, they may be the same or different].

Composition containing silsesquioxane and silsesquioxane-containing hydroxyalkyl cellulose resin composition

Growing community of inventors

Kyoto, Japan

Lianzhen Lin