Why does sodium polyacrylate absorb water?
Sodium Polyacrylate is a polymer that naturally attracts water. The structures are called hydrogen bonding. They attract both hydrogen and oxygen in the water. It is the absorbent material in diapers.
They wear a diaper made of Sodium Polyacrylate under their suits, which is made to absorb the urine. Sodium Polyacrylate is also used in diapers and antiperspirant deodorant. When not in their spacesuits, early astronauts did their business in a sort of tube mechanism, or even a special blue plastic bag containing disinfectant.
The Fortune Teller Fish is made of the same chemical used in disposable diapers, sodium polyacrylate. Sodium polyacrylate will grab onto water molecules that it touches, changing the shape of the molecule. As the molecules change shape, so does the shape of the fish. If you submerge the fish in water, it won't be able to bend when you place it on your hand. If you let the fortune teller fish dry out, it will…