This invention relates a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate and processes to produce the cellulose solution. Another aspect of this invention relates to shaped articles prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising derivatives of cellulose prepared from a cellulose solution comprising at least one tetraalkylammonium alkylphosphate. Another embodiment of this invention relates to compositions comprising regioselectively substituted cellulose esters prepared from a cellulose solution comprising cellulose and at least one tetraalkylammonium alkylphosphate. In another embodiment of the invention, the cellulose esters of the present invention are used as protective and compensation films for liquid crystalline displays.

Crystalline cellulose gels useful in the stabilization of emulsions, including nanoemulsions, and for acting as cryptands or clathrates, and methods for their use and production are provided. In some embodiments, the emulsion is an oil-in-water emulsion. In some embodiments, such emulsions and/or vesicles produced in such emulsions, and/or the crystalline cellulose gel itself 15 are useful in the fields of drug delivery, pharmaceuticals, cosmetics, feed and food, paints and coatings, mining, or oil and gas recovery.

An esterification method of cellulose and a preparation method of a cellulose formate filament material are provided. The esterification method of cellulose includes the following steps: mixing cellulose with an esterification system to obtain a mixture, and subjecting the mixture to esterification, where the esterification system includes formic acid, zinc chloride, and water at a molar ratio of (2-4):1:(1-2).

An esterification method of cellulose and a preparation method of a cellulose formate filament material are provided. The esterification method of cellulose includes the following steps: mixing cellulose with an esterification system to obtain a mixture, and subjecting the mixture to esterification, where the esterification system includes formic acid, zinc chloride, and water at a molar ratio of (2-4):1:(1-2).