“…However, they do not dissolve in water when brought into contact with water (Rithe, 2014;El-Sherbiny and Yacoub, 2013;Chavda, 2012;& Pal, 2009). The water holding capacity of hydrogels is induced by the presence of hydrophilic groups, such as hydroxyl, carboxyl, amide, and sulfonic groups distributed along the backbone of polymer chain; whereas the cross-links are formed by either covalent bonds, electrostatic or dipole-dipole interactions (Rithe, 2014;El-Sherbiny and Yacoub, 2013;Chavda, 2012;& Pal, 2009.Hydrogels have achieved considerable interest in the last few decades due to their wide range of clinical and biomedical applications ranging from drug delivery (Qui and Park, 2001), tissue engineering (El-Sherbiny and Yacoub, 2013;Vlierberghe, 2011&Hoffman, 2002,regenerative medicine (El-Sherbiny and Yacoub, 2013), contact lenses (Walther, 2011& Zhang, 2011), wound dressings (El-Kased, 2017Gupta, 2011& Lu, 2010, soil water retention (Wei and Durian, 2013) to disposable diapers (Colón, 2011).…”