Table 2.
Common hydrogels used in the pharmaceutical field for the preparation of controlled drug delivery systems [65]
| Hydrogel polymer | Type of hydrogel |
|---|---|
| Poly(glycolic acid) (PGA) | Biodegradable Hydrogels |
| Poly(lactic acid) (PLA) | |
| PLA-PGA | |
| PLA-PEG | |
| Chitosan | |
| Dextran | |
| Dextran-PEG | |
| Polycyanoacrylates | |
| Fumaric acid-PEG | |
|
| |
| Non-Biodegradable Hydrogels | |
| Poly(hydroxyethyl methacrylate) (PHEMA) | Neutral |
| Poly(vinyl alcohol) (PVA) | |
| Poly(N-vinyl pyrrolidone) (PNVP) | |
| Poly(ethylene-co-vinyl acetate) (PEVAc) | |
|
| |
| Poly(acrylamide) (PAAm) | pH-Responsive |
| Poly(acrylic acid) (PAA) | |
| Poly(methacrylic acid) (PMAA) | |
| Poly(diethylaminoetyl methacrylate) (PDEAEMA) | |
| Poly(dimethylaminoethyl methacrylate) (PDMAEMA) | |
|
| |
| Poly(methacrylic acid-grafted-poly(ethylene glycol) (P(MAA-g-EG)) | Complexing hydrogels |
| Poly(acrylic acid-grafted-poly(ethylene glycol) (P(AA-g-EG)) | |
|
| |
| Poly(N-isopropyl acrylamide) (PNIPAAm) | Temperature-sensitive |
|
| |
| PNIPAAm/PAA | pH/Temperature-sensitive |
| PNIPAAm/PMAA | |