Abstract
Hydrogels are cross-linked, three-dimensional polymers that are capable to absorb large amounts of water-retaining moisture. The key features of a hydrogel such as biocompatibility, biodegradability, versatility, stimuli- responsiveness, flexibility, stability, porosity, permeation, less toxicity, and easy use are the advantages of hydrogels. The polymers have diverse classifications based on source, composition, cross-linking, responsiveness, and ionic charge. They have a wide range of applications in wound dressing, drug delivery, tissue engineering, agriculture, the food industry, and biosensors. Though hydrogels are commercially available in the market and extensively used, still research is ongoing to develop efficient products. The chapter focuses on the overview of hydrogels as supramolecules in the field of biomedicine, their characterization and classification, role in drug delivery, nerve regeneration and wound healing.
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