Types of Hydrogels

SpaceOAR hydrogel is an option for men who undergo radiation treatment for prostate cancer. It acts as a spacer providing space between the rectum and the prostate, making it much less likely that the rectum is exposed to radiation.

Nanocomposite hydrogels (NC gels) are nanomaterial-filled, hydrated, polymeric networks that exhibit higher elasticity and strength relative to traditionally made hydrogels. A range of natural and synthetic polymers are used to design nanocomposite network.

In the present study, gel formulations of organogels, hydrogels, and oleo-hydrogel (bigels) were evaluated as transdermal drug delivery systems for diltiazem HCL (DH).

Note 2: A gel can contain: (i) a covalent polymer network, e.g., a network formed by crosslinking polymer chains or by nonlinear polymerization; (ii) a polymer network formed through the physical aggregation of polymer chains, caused by hydrogen bonds, crystallization, helix formation, complexation, etc., that results in regions of local order acting as the network junction points.

As per my opinion, the aerogel, xerogel, hydrogel and cryogel are basically categorized as per preparation methods depending upon the method used for extraction of liquid from the solid network of gel system.