Hydrogels and superabsorbent polymers (SAPs) are innovative materials ... have excellent water-absorbent properties but pose significant environmental challenges due to their poor biodegradability.

A polymer is simply a long chain of repeating molecules. Super-absorbent polymers expand when they meet water because water is drawn into the molecules of the polymer. They work like giant sponges.

SUITA, Osaka Prefecture--A scientist here says he has developed an inexpensive, biodegradable super absorbent polymer (SAP) derived from starch that could help resolve the growing environmental ...