“…Among different polymer electrolytes those based on natural macromolecules such as chitosan [3], starch [4], pectin [5], agar [6], gelatin [7] and DNA [8] have been also reported. Cellulose and its derivatives [9,10] are very attractive natural polymers due to cellulose abundance in nature. Most of cellulose derivatives are soluble in water; however, some of them, such as hydroxypropyl cellulose, methyl cellulose, ethyl cellulose, cellulose acetate are soluble in organic solvents [11].…”