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'Hydrogel' is a network of polymer chains that are water-insoluble, sometimes found as a colloidal gel in which water is the dispersion medium. Hydrogels are superabsorbent (they can contain over 99% water) natural or synthetic polymers.
Hydrogels possess also a degree of flexibility very similar to natural tissue, due to their significant water content.
Common uses for hydrogel are
★ currently used as scaffolds in tissue engineering. When used as scaffolds, hydrogels may contain human cells in order to repair tissue.
★ environmentally sensitive hydrogels. These hydrogels have the ability to sense changes of pH, temperature, or the concentration of metabolite and release their load as result of such a change.
★ as sustained-release delivery system
★ provide absorption,desloughing and debriding capacities of necrotics and fibrotic tissue.
★ hydrogels that are responsive to specific molecules, such as glucose or antigens can be used as biosensors as well as in DDS.
★ In disposable diapers where they "capture" urine, or in sanitary towels
★ contact lenses (silicone hydrogels, polyacrylamides)
★ medical electrodes using hydrogels composed of cross linked polymers (polyethylene oxide,polyAMPS and polyvinylpyrrolidone)
★ Water gel explosives
Other, less common uses include
★ breast implants
★ granules for holding soil moisture in arid areas
★ dressings for healing of burn or other hard-to-heal wounds. Wound GEL are excellent for helping to create or maintain environment.
★ reservoirs in topical drug delivery; particularly ionic drugs, delivered by iontophoresis (see ion exchange resin)
Common ingredients are e.g. polyvinyl alcohol, sodium polyacrylate, acrylate polymers and copolymers with an abundance of hydrophilic groups.
★ Hydrocolloid
★ ReVision Optics, Presbyopia Correction Research
Hydrogels possess also a degree of flexibility very similar to natural tissue, due to their significant water content.
Common uses for hydrogel are
★ currently used as scaffolds in tissue engineering. When used as scaffolds, hydrogels may contain human cells in order to repair tissue.
★ environmentally sensitive hydrogels. These hydrogels have the ability to sense changes of pH, temperature, or the concentration of metabolite and release their load as result of such a change.
★ as sustained-release delivery system
★ provide absorption,desloughing and debriding capacities of necrotics and fibrotic tissue.
★ hydrogels that are responsive to specific molecules, such as glucose or antigens can be used as biosensors as well as in DDS.
★ In disposable diapers where they "capture" urine, or in sanitary towels
★ contact lenses (silicone hydrogels, polyacrylamides)
★ medical electrodes using hydrogels composed of cross linked polymers (polyethylene oxide,polyAMPS and polyvinylpyrrolidone)
★ Water gel explosives
Other, less common uses include
★ breast implants
★ granules for holding soil moisture in arid areas
★ dressings for healing of burn or other hard-to-heal wounds. Wound GEL are excellent for helping to create or maintain environment.
★ reservoirs in topical drug delivery; particularly ionic drugs, delivered by iontophoresis (see ion exchange resin)
Common ingredients are e.g. polyvinyl alcohol, sodium polyacrylate, acrylate polymers and copolymers with an abundance of hydrophilic groups.
| Contents |
| See also |
| External links |
See also
★ Hydrocolloid
External links
★ ReVision Optics, Presbyopia Correction Research
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