"The flexible properties of hydrogels — highly absorbent,
gelatinous polymers that shrink and expand depending on environmental
conditions such as humidity, pH and temperature — have made them ideal
for applications from contact lenses to baby diapers and adhesives," according to
Phys.org. "In recent years, researchers have investigated
hydrogels’
potential in drug delivery, engineering them into drug-carrying
vehicles that rupture when exposed to certain environmental stimuli.
Such vesicles may slowly release their contents in a controlled fashion;
they may even contain more than one type of drug, released at different
times or under various conditions."
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