A two step method for the preparation of carbamate cross linked cellulose films using an ionic liquid and their water retention properties.
Carbamate cross linked cellulose films can be prepared in a two step method using cellulose dissolved in 1 n butyl 3 methylimidazolium chloride ionic liquid. The new technique involves casting the film from cellulose ionic liquid solution onto a glass surface and application of alkyl/aryl diisocyanate in dry dimethylsulfoxide solution onto the cellulose ionic liquid coating on glass and allowing the cross linking reaction to occur on the pre formed cellulose coating. The carbamate cross linked cellulose films formed were characterized by FT IR, and TG DTA. The water retention values of the films are shown to decrease with the increase in hydrophobicity of the alky/aryl group linker in the carbamate bridges.
Carbohydrate polymers