What is a nappy and how does it work? Nappies contain a very special chemical called Sodium Polyacrylate. This chemical soaks up liquids like water or urine (wee!) and changes from a powder to a jelly ...

In dilute solutions, polyion complexes often do not precipitate but become colloidal particles in the same way as hydrophobic colloids of low molar mass salts, such as AgI. 10 Colloidal polyion ...

The secret, water-absorbing chemical in a nappy is a polymer called sodium polyacrylate. A polymer is simply a long chain of repeating molecules. Super-absorbent polymers expand when they meet water ...

Other names it goes by: Acrylic acid homopolymer, sodium salt, polyacrylic acid. What's it used in? Moisturisers, anti-ageing treatments, sunscreens. What does it do? It's used as a polymer to bind ...