Hydrogels usually are water swollen polymer bonded matrices, with a tremendous tendency to take in water. Their chance to swell, under physiological conditions, makes them an ideal material for biomedical apps. The hydrophilicity of the network is caused by the presence involving chemical residues for instance hydroxylic, carboxylic, amidic, primary amidic, sulphonic and others that could be found within the polymer backbone as well as as lateral organizations. It is also possible to create hydrogels containing a tremendous portion of hydrophobic polymers, by simply blending or corp polymerizing hydrophilic in addition to hydrophobic polymers, as well as by producing inter breaking through networks (IPN) as well as semi-inter penetrating polymer bonded networks (s-IPN) involving hydrophobic and hydrophilic polymers.