55 results about "Cellulose formation" patented technology

The present invention concerns a method of preparing a film of nanofibrillated cellulose (NFC) on at least one surface of a support material, wherein the film is applied and spread directly onto a surface of the plastic support material in the form of a suspension of nanofibrillated cellulose, whereby the nanofibrillated cellulose forms a film. Further, the invention concerns a structure containing or consisting of a film of nanofibrillated cellulose prepared using said method.

The purpose of the present invention is to provide a carboxymethyl cellulose salt for electrodes of nonaqueous electrolyte secondary batteries, which is capable of achieving a good balance between prevention of defects such as streaks and pin holes on a coated electrode surface and excellent bonding strength to a collector or excellent bonding strength between active materials. A production method which comprises: (1) an alkali cellulose formation reaction step wherein a mixed solvent that contains an alcohol having 3 or less carbon atoms and water at a mixing ratio (mass ratio) of from 75:25 to 95:5 is used and the alkali concentration relative to water is 25-40% by mass; (2) an etherification reaction step wherein a reaction is carried out in the presence of an excess alkali of 0.2-0.5 mol per unit of an anhydroglucose of the cellulose; (3) a neutralization step wherein an acid is added after the etherification reaction so that the pH of the reaction mixture is adjusted to 6.0-8.0; and (4) a heating step wherein the mixed solvent is removed and an alkali is added after the neutralization step so that the pH of the reaction mixture is adjusted to 8.0-9.0, and subsequently, a heat treatment is carried out at 40-70 DEG C for 30-120 minutes.

The invention belongs to the field of material science and particularly relates to a graphene oxide / cellulose compound material as well as a preparation method and application of the material. The compound material is prepared by mixing graphene oxide suspension and alkaline solution of cellulose, and forming a compound structure of the graphene oxide and the cellulose under the action of mechanical stirring, shearing, ultrasonic or the like. In the preparation method, raw materials are cheap and easy to obtain, a water system is simple and free of pollution, equipment is simple and low in cost, and the industrial preparation is easy to realize; and the prepared compound material has the properties of fiber and the graphene oxide and is widely applied.

The invention discloses a preparation method of nanocellulose and polymer composite aerogel. The preparation comprises the steps that a Pickerin emulsion containing a polymer in an oil phase of which the nanocellulose is stable is subjected to gelation firstly, freeze drying is conducted, and the nanocellulose and polymer composite aerogel which is high in porosity and low in density is obtained. The preparation method is suitable for nanocellulose which is extracted and prepared from various raw materials and has different morphology and various water insoluble polymers, and large-scale popularization is easy to achieve. For most composite aerogel materials formed by water-soluble polymers and cellulose at present, composite aerogel materials formed by the water insoluble polymers and cellulose are obtained. Meanwhile, reagents used in the preparation method are common reagents, the price is low, the preparation process is simple, convenient and rapid, and the obtained nanocellulose and polymer composite aerogel has the advantages of being high in porosity, low in density and low in heat conductivity coefficient, having water absorption oil absorption performance and the like.