A method for preparing stably dispersed cellulose nanofibers comprises the following steps: 1) mixing cellulose and an organic solvent, the percentage of the cellulose being 1% to 15% in weight; 2) adding an esterification agent into the resultant mixture of step 1), the molar ratio of the esterification agent to the cellulose being from 1:0.1 to 4; and 3) physically breaking the resultant mixture of step 2) until a suspension liquid with stably dispersed cellulose nanofibers of 2-1000 nm in diameter and 10-100 μm in length is obtained, an esterification reaction of hydroxyl group(s) on the surface of cellulose fibers occurring at the time of the breaking. Also disclosed are dispersed cellulose nanofibers with improved compatibility to the matrix than the untreated cellulose and an improved strength of the composite materials.

The invention relates to a method for the acetylation of lignocellulose-containing fibrous materials and to acetylated lignocellulose-containing fibrous materials obtained according to said method, and to the use thereof.

The invention relates to a method for the acetylation of lignocellulose-containing fibrous materials and to acetylated lignocellulose-containing fibrous materials obtained according to said method, and to the use thereof.

The present invention relates to a method for manufacturing hydrophobized nanocellulose comprising the steps of: a) providing a cellulose-containing material wherein the cellulose-containing material contains less than 20 wt. % water, b) contacting the cellulose-containing material with oxalic acid dihydrate, and heating above the melting point of the oxalic acid dihydrate, to obtain cellulose oxalates, c) washing the mixture, d) preparing a suspension comprising the material from step c) and e) recovering hydrophobized nanocellulose from the suspension. The present invention relates also to a method of manufacturing hydrophobized nanocellulose intermediate which comprises the above described steps a)-c). The methods disclosed in the present invention are quick, inexpensive, simple, and direct. Pulp can be used as raw material.

The present invention provides a method for the acetylation of wood comprising treating the wood with an acetylation medium under wood acetylation reaction conditions and drying the acetylated wood, wherein the drying comprises at least two steps, wherein the wood is first dried with a first drying medium and then with a second drying medium.

The present invention provides a method for the acetylation of wood comprising treating the wood with an acetylation medium under wood acetylation reaction conditions and drying the acetylated wood, wherein the drying comprises at least two steps, wherein the wood is first dried with a first drying medium and then with a second drying medium.

A method for producing a resin composition including a first kneading step for loading acetylated cellulose fibers having a weighted average fiber length of 0.20 mm to 1.50 mm, a compatibilized resin, and urea in a kneading machine and kneading the same.

The present invention provides a method for the acetylation of wood comprising treating the wood with an acetylation medium under wood acetylation reaction conditions and drying the acetylated wood, wherein the drying comprises at least two steps, wherein the wood is first dried with a first drying medium and then with a second drying medium.

The present invention provides a method for the acetylation of wood comprising treating the wood with an acetylation medium under wood acetylation reaction conditions and drying the acetylated wood, wherein the drying comprises at least two steps, wherein the wood is first dried with a first drying medium and then with a second drying medium.

[Problem] To provide an oil thickener which has high viscosity increasing effect on an oily ingredient such as silicone oil, a non-polar organic compound, a low-polarity organic compound or the like and which has good handlability

[Means to Solve the Problem] Surface-hydrophobized cellulose nanofibers for an oil thickener which are cellulose nanofibers having an average thickness of 3 to 200 nm and an average length of 0.1 μm or larger, and a 1 wt. % aqueous dispersion of which has a viscosity of 700 to 2100 mPa.Math.s, and hydroxyl groups in cellobiose units of which are substituted by vinyl esters and/or organic acid vinyl esters in a substitution degree of 0.2 to 0.8.