Abstract: Provided is a novel cellulose derivative having excellent water resistance. This is a cellulose acylate oxoalkanoate which is a cellulose derivative corresponding to cellulose, except with substituents replacing part or all of hydrogen atoms in the hydroxy groups of the cellulose. The substituents includes a group represented by General Formula (1) and a group represented by General Formula (2). The cellulose acylate oxoalkanoate has a degree x of substitution with the group represented by General Formula (1), a degree y of substitution with the group represented by General Formula (2), and a degree z of unsubstitution, where x, y, and z meet conditions specified by Expressions (A), (B), and (C): 0.1?x?2.99??(A) 0.01?y?2.

Abstract: Problem to be Solved It is intended to provide a conductive resin composition that exhibits high conductivity even without being supplemented with a special resin or a third component, and a molded article obtained from the resin composition. Solution The conductive cellulose-based resin composition of the present invention comprises (A) an aliphatic cellulose ester and (B) at least one carbon material selected from the group consisting of a single-walled carbon nanotube, a multi-walled carbon nanotube, single-layer graphene, multi-layer graphene, fullerene, and carbon black. The volume resistivity of this conductive cellulose-based resin composition is, for example, 10?3 to 20 ?·cm, preferably 10?3 to 1 ?·cm. The content of the carbon material (B) is, for example, 0.5 to 80% by weight of the whole conductive cellulose-based resin composition.

Abstract: The conductive cellulose-based resin composition of the present invention comprises (A) a cellulose acetate ester having a total degree of acetyl substitution of 0.5 to 1.1 and (B) at least one carbon material selected from the group consisting of single-walled carbon nanotube, multi-walled carbon nanotube, single-layer graphene, multi-layer graphene, fullerene, and carbon black. This conductive cellulose resin composition exhibits high conductivity even without being supplemented with a special resin or a third component. Also, the conductive cellulose-based resin composition can be easily molded in an aqueous system.

Abstract: Disclosed herein is a quantum dot composite that can maintain luminous efficiency per unit quantum dot even when a quantum dot concentration is high, and therefore can achieve a high emission intensity. The quantum dot composite includes: a matrix; and quantum dots dispersed in the matrix, wherein the matrix is composed of cellulose acetate having a compositional distribution index (CDI) of 3.0 or less, and a concentration of the quantum dots is 0.05 wt % or higher.

Abstract: Provided are a cellulose acetate fiber and a cellulose acetate fiber molded article which are excellent in water solubility and biodegradability and are small in load onto the natural environment even when allowed to stand still in the environment. The invention provides a cellulose acetate fiber containing cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.3 and a compositional distribution index (CDI) of 2.0 or less as well as a cellulose acetate fiber molded article.

Abstract: A nutrient composition contains a cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.1. The cellulose acetate may have a compositional distribution index (CDI) of 2.0 or less, where the CDI is specified by the formula: CDI=(Measured value of half height width of chemical composition)/(Theoretical value of half height width of chemical composition) where the measured value of half height width of chemical composition represents the half height width of chemical composition determined by HPLC analysis of a cellulose acetate propionate prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample); and the theoretical value of half height width of chemical composition=2.35482?{square root over (3*DPw*(DS/3)*(1?DS/3))}/DPw??[Math.

Abstract: A cellulose acetate according to the present invention has a total degree of acetyl substitution of 0.4 to 1.1 and has a compositional distribution index (CDI) of 3.0 or less, where the CDI is specified by the formula: CDI=(Measured value of half height width of chemical composition)/(Theoretical value of half height width of chemical composition) where the measured value of half height width of chemical composition is a half height width of chemical composition determined by analyzing a cellulose acetate propionate by HPLC, where the cellulose acetate propionate is prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample); and Theoretical value of half height width of chemical composition=2·35482?{square root over (3*DPw*(DS/3)*(1?DS/3))}{square root over (3*DPw*(DS/3)*(1?DS/3))}/DPw??[Math.

Abstract: Provided is a process for obtaining solid cellulose, such as a cellulose solidified article or cellulose shaped article, from a cellulose solution without causing discharge of large amounts of waste liquids and environmental issues such as large energy consumption. The process produces solid cellulose through the steps of (A) dissolving cellulose in a solvent (s1) to give a cellulose solution, where the solvent (s1) includes at least one onium hydroxide in a content of from 45 to 85 percent by weight and water in a content of from 15 to 55 percent by weight, and the at least one onium hydroxide is selected from the group consisting of quaternary phosphonium hydroxides and quaternary ammonium hydroxides; (B) bringing the cellulose solution into contact with a poor solvent (s2) to precipitate cellulose as a cellulose solidified article; and (C) separating and collecting the cellulose solidified article.

Abstract: Problem to be Solved It is intended to provide a conductive resin composition that exhibits high conductivity even without being supplemented with a special resin or a third component, and a molded article obtained from the resin composition. Solution The conductive cellulose-based resin composition of the present invention comprises (A) an aliphatic cellulose ester and (B) at least one carbon material selected from the group consisting of a single-walled carbon nanotube, a multi-walled carbon nanotube, single-layer graphene, multi-layer graphene, fullerene, and carbon black. The volume resistivity of this conductive cellulose-based resin composition is, for example, 10?3 to 20 ?·cm, preferably 10?3 to 1 ?·cm. The content of the carbon material (B) is, for example, 0.5 to 80% by weight of the whole conductive cellulose-based resin composition.

Abstract: The conductive cellulose-based resin composition of the present invention comprises (A) a cellulose acetate ester having a total degree of acetyl substitution of 0.5 to 1.1 and (B) at least one carbon material selected from the group consisting of single-walled carbon nanotube, multi-walled carbon nanotube, single-layer graphene, multi-layer graphene, fullerene, and carbon black. This conductive cellulose resin composition exhibits high conductivity even without being supplemented with a special resin or a third component. Also, the conductive cellulose-based resin composition can be easily molded in an aqueous system.

Abstract: To provide a cellulose acetate which gives a cellulose acetate optical film exhibiting optical properties as a result of stretching, in which the film shows excellent stretchability and gives a stretched film having excellent optical properties. Disclosed is a cellulose diacetate for a retardation film, having a total degree of acetyl substitution of from 2.27 to 2.56, in which the cellulose diacetate has a polydispersity Mw/Mn of more than 3.0 and 7.5 or less, a degree of substitution at the 6-position of from 0.65 to 0.85, a half height width of acetylation distribution of from 1.0 to 2.3, and a viscosity-average degree of polymerization of 182 or more and 213 or less. The cellulose diacetate for a retardation film preferably has a 6-percent viscosity of from 120 to 230 mPa·s and preferably has a weight-average molecular weight Mw of 205,000 or more and 235,000 or less.

Abstract: Provided is a process for obtaining solid cellulose, such as a cellulose solidified article or cellulose shaped article, from a cellulose solution without causing discharge of large amounts of waste liquids and environmental issues such as large energy consumption. The process produces solid cellulose through the steps of (A) dissolving cellulose in a solvent (s1) to give a cellulose solution, where the solvent (s1) includes at least one onium hydroxide in a content of from 45 to 85 percent by weight and water in a content of from 15 to 55 percent by weight, and the at least one onium hydroxide is selected from the group consisting of quaternary phosphonium hydroxides and quaternary ammonium hydroxides; (B) bringing the cellulose solution into contact with a poor solvent (s2) to precipitate cellulose as a cellulose solidified article; and (C) separating and collecting the cellulose solidified article.

Abstract: To provide a cellulose acetate which gives a cellulose acetate optical film exhibiting optical properties as a result of stretching, in which the film shows excellent stretchability and gives a stretched film having excellent optical properties. Disclosed is a cellulose diacetate for a retardation film, having a total degree of acetyl substitution of from 2.27 to 2.56, in which the cellulose diacetate has a polydispersity Mw/Mn of more than 3.0 and 7.5 or less, a degree of substitution at the 6-position of from 0.65 to 0.85, a half height width of acetylation distribution of from 1.0 to 2.3, and a viscosity-average degree of polymerization of 182 or more and 213 or less. The cellulose diacetate for a retardation film preferably has a 6-percent viscosity of from 120 to 230 mPa·s and preferably has a weight-average molecular weight Mw of 205,000 or more and 235,000 or less.

Abstract: The present invention provides a cellulose ester in which heat resistance under wet condition is compatible with both releasability and spinnability even when the amount of the residual solvent is small in a casting process. The cellulose ester fulfills the following formula: 0.5<(B)/(A)<1.5 wherein (A) and (B) represent the total amount (in terms of molar amount) of residual sulfuric acid in 1 gram of the cellulose ester and the total amount (in terms of molar amount) of calcium contained in 1 gram of the cellulose ester, respectively.

Abstract: Cellulose ester and film thereof useful for remarkably improving optical properties, e.g., optical isotropy. The cellulose ester has a degree of substitution from 2.90 to 2.965, a total of degrees of substitution at 2- and 3-positions ?1.97, and a half height width of chemical composition expressed in degree of substitution of ?0.09. The cellulose ester maybe produced by (i) acylating a cellulose with an acylating agent in the presence of a sulfuric acid catalyst, and (ii) hydrolyzing the acylated product in the presence of a sulfuric acid catalyst, wherein the acylation carried out with 1.40 to 2.0 molar equivalents of the acylating agent relative to 1 mol of a hydroxyl group in the cellulose in the presence of 6.5 to 9.5 parts by weight of the sulfuric acid catalyst relative to 100 parts by weight of the cellulose in the acylating step (i).

Abstract: A cellulose ester and film thereof useful for remarkably improving optical properties such as optical isotropy are provided. The cellulose ester is adjusted so that the degree of substitution is from 2.90 to 2.965, the total of degrees of substitution at 2- and 3-positions is not less than 1.97, and the half height width of chemical composition expressed in degree of substitution is not more than 0.09. Such a cellulose ester maybe produced by a method for producing a cellulose ester, which comprises (i) an acylating step for acylating a cellulose with an acylating agent in the presence of a sulfuric acid catalyst, and (ii) a hydrolyzing step for hydrolyzing the acylated product in the presence of a sulfuric acid catalyst, and in which the acylation carried out with from 1.40 to 2.0 molar equivalents of the acylating agent relative to 1 mol of a hydroxyl group in the cellulose in the presence of 6.5 to 9.

Abstract: The present invention provides a cellulose ester in which heat resistance under wet condition is compatible with both releasability and spinnability even when the amount of the residual solvent is small in a casting process. The cellulose ester fulfills the following formula: 0.5<(B)/(A)<1.5 wherein (A) and (B) represent the total amount (in terms of molar amount) of residual sulfuric acid in 1 gram of the cellulose ester and the total amount (in terms of molar amount) of calcium contained in 1 gram of the cellulose ester, respectively.

Abstract: A shaped article is obtained by polymerizing a selectively reflective solution comprising a cellulose derivative and a polymerizable solvent. The cellulose derivative is a cellulose derivative having an alkyl degree of substitution of about 2.2-3, an acyl degree of substitution of about 0-0.8 (preferably 0.1-0.8), and a total degree of alkyl and acyl substitution of about 2.8-3. The cellulose derivative is thus, e.g., a highly substituted alkyl cellulose (ethyl cellylose) or an acylated alkyl cellulose. Moreover, the polymerizable solvent may be a (meth)acrylic monomer (e.g., (meth)acrylic acid). According to the present invention, a shaped article having selective reflectivity with respect to wavelength and circularly polarized light is provided.

Abstract: This invention provides, in an easy manner, a film-like moulded article which shows a selective reflection of a wavelength and circularly polarized light. A suitable environment for formation of a liquid crystalline phase is prepared by forming a moulded article (thin film-like moulded article) using a cellulose derivative which can form the liquid crystalline phase (e.g. a water-insoluble cellulose derivative such as ethyl cellulose), and allowing the moulded article to absorb a highly volatile organic solvent by contact with its vapour. After formation of the liquid crystalline phase, removal of the organic solvent provides the object moulded article. The thin film-like moulded article can be employed for an optical element of a circular polarized light-generator or a decoration material.

Abstract: An object of the invention is to obtain cellulose acetate with improved physical properties, particularly film strength arid improved flexibility of the molded product. Cellulose acetate wherein average degree of acetylation is not less than 59%, viscosity average degree of polymerization (DP) is not less than 290, and concentrated solution viscosity (.eta.) according to the falling ball viscosity method for viscosity average degree of polymerization (DP) is expressed by the following formula (1): 2.814.times.ln(DP)-11.753.ltoreq.ln(.eta.).ltoreq.7.28.times.ln(DP)-37.059 (1) and a process for production thereof.