Provided are: a fine cellulose fiber that is superior in handling properties and that can suitably be used as a reinforcing material or the like for resin; a production method of the fine cellulose fiber; and a slurry and a composite comprising the fine cellulose fibers. The present invention pertains to fine cellulose fibers comprising a carbamate group. The degree of substitution with the carbamate group with respect to hydroxy groups in the fine cellulose fibers is preferably no less than 0.05 and no greater than 0.5. The present invention pertains to a slurry comprising the fine cellulose fibers, to a composite comprising the fine cellulose fibers and a resin, and to a production method of the fine cellulose fibers, comprising performing a heat treatment on a mixture of a plant raw material and urea or the like, and performing a miniaturization treatment of the plant raw material.

It is an object of the present invention to provide a thickener capable of exhibiting excellent light resistance. The present invention relates to a thickener comprising cellulose fibers having a fiber width of 8 nm or less and water, wherein the thickener is a slurry or a gel, and when the thickener is filled in a colorless and transparent glass cell having an inside dimension of 1 cm in depth×4 cm in width×4.5 cm in height and the thickener is then irradiated with ultraviolet rays with a wavelength of 300 nm or more and 400 nm or less, using a xenon lamp, from the side of the maximum area surface of the glass cell, so as to be an irradiance of 180 W/m.sup.2 and an integrated light amount of 500 mJ/m.sup.2, the amount of a change in the yellowness before and after ultraviolet irradiation measured in accordance with JIS K 7373 is 10 or less.

It is an object of the present invention to provide a thickener capable of exhibiting excellent light resistance. The present invention relates to a thickener comprising cellulose fibers having a fiber width of 8 nm or less and water, wherein the thickener is a slurry or a gel, and when the thickener is filled in a colorless and transparent glass cell having an inside dimension of 1 cm in depth×4 cm in width×4.5 cm in height and the thickener is then irradiated with ultraviolet rays with a wavelength of 300 nm or more and 400 nm or less, using a xenon lamp, from the side of the maximum area surface of the glass cell, so as to be an irradiance of 180 W/m.sup.2 and an integrated light amount of 500 mJ/m.sup.2, the amount of a change in the yellowness before and after ultraviolet irradiation measured in accordance with JIS K 7373 is 10 or less.

Provided herein are amine-functionalized cellulose polymers useful for carbon dioxide capture and methods of preparation and use thereof.

Provided herein are amine-functionalized cellulose polymers useful for carbon dioxide capture and methods of preparation and use thereof.

Fibrous cellulose-containing materials not causing coloring problem when used as resin-reinforcing materials, a preparation method thereof, and fibrous cellulose composite resins without coloring problem. The material contain fibrous cellulose having an average fiber width of 0.1 to 19 μm, and having hydroxyl groups partially/fully substituted with carbamate groups at a rate of 1.0 mmol/g or higher, and the material has a moisture percentage below 18%. The method includes heat treating a cellulose raw material and urea and/or a derivative thereof to substitute part/all of hydroxyl groups in cellulose with carbamate groups, defibrating the raw material to have an average fiber width of 0.1 to 19 μm, and adjusting moisture percentage to below 18% to obtain a fibrous cellulose-containing material, and the heat treating is performed so that the substitution rate is 1.0 mmol/g or higher. The fibrous cellulose composite resin contains the fibrous cellulose-containing material and resin.

Fibrous cellulose-containing materials not causing coloring problem when used as resin-reinforcing materials, a preparation method thereof, and fibrous cellulose composite resins without coloring problem. The material contain fibrous cellulose having an average fiber width of 0.1 to 19 μm, and having hydroxyl groups partially/fully substituted with carbamate groups at a rate of 1.0 mmol/g or higher, and the material has a moisture percentage below 18%. The method includes heat treating a cellulose raw material and urea and/or a derivative thereof to substitute part/all of hydroxyl groups in cellulose with carbamate groups, defibrating the raw material to have an average fiber width of 0.1 to 19 μm, and adjusting moisture percentage to below 18% to obtain a fibrous cellulose-containing material, and the heat treating is performed so that the substitution rate is 1.0 mmol/g or higher. The fibrous cellulose composite resin contains the fibrous cellulose-containing material and resin.

The present invention relates to novel antiviral compounds which are covalently attached to solid, macro surfaces. In another embodiment, the invention relates to novel antiviral compositions including a polymeric material and, embedded therein, an antiviral compound. In other embodiments, the invention relates to making a surface antiviral and making a polymeric material antiviral.

The present invention relates to novel antiviral compounds which are covalently attached to solid, macro surfaces. In another embodiment, the invention relates to novel antiviral compositions including a polymeric material and, embedded therein, an antiviral compound. In other embodiments, the invention relates to making a surface antiviral and making a polymeric material antiviral.

Several embodiments of NO releasing structures are disclosed. In some embodiments, the structures are covalently modified to store and release nitric oxide. Some embodiments pertain to methods of making and use of these structures. The covalently modified polymer structures may be tailored to release nitric oxide in a controlled manner and are useful for treatment of various medical conditions.