Preparation of cellulose-based hydrogel: a review

This paper reviews the preparation of hydrogel based on cellulose and its derivatives. Cellulose is the most abundant natural organic polymer on earth. To date, the exploitation of cellulose has been studied in various applications. However, cellulose has low solubility in water and most organic solvents. Thus, specific solvent systems such as NaOH/urea, NaOH/thiourea, lithium chloride, and ionic liquids need to be employed to vary cellulose...