A REVIEW PAPER ON HYDROGELS
Poly (2-hydroxyethyl methacrylate)HEMA was largely ignored until 1960. Ever since life on Earth, hydrogels have been present in nature. In the presence of water and other solvents, the polymerization of HEMA and crosslinking agents has contributed to the new field of biomedical hydrogels. This paper attempts to review the studies focused on classification, implementation and handling on the option of selectivity for hydrogels. Super porous hydrogels (SPHs) and super absorbent polymers (SAPs) are an exciting next generation group that has been highlighted as a perfect mould methodology for the analysis of solution-dependent phenomena.Owing to their potential in hi-tech implementations in the biomedical, medicinal, biotechnology, bioseparation, biosensor, agriculture, oil recovery and cosmetics industries, hydrogels, often referred to as smart and/or hungry networks, are currently subject to substantial scientific study. In reaction to minor shifts in the environment, smart hydrogels demonstrate a major physiochemical transition. Such modifications, however, are reversible; thus, after a reaction, the hydrogels are able to revert to their original state as soon as the catalyst is withdrawn..