Nappies are quite incredible.

Next term we will be focusing on 'Chemical Science' Today we had an introductory session.

"Nappies are quite incredible."
Their ability to absorb and retain moisture is very clever. Using synthetic polymers, today’s state of the art disposable diapers will absorb up to 20 times their weight in water. This phenomenal absorption capacity is due to the absorbent pad in the core of the nappy. This pad is composed of two essential elements, a hydrophilic, or water loving , polymer and a fibrous material such as wood pulp

After a bit of exploration and discussion about the technology and science of nappies as well as looking at the properties, we experimented with nappies, looking closely at the chemical reactions that take place when water meets nappy. Then when salt is added.


Vocabulary.
Permeable
Hydrophilic
Impermeable
Moisture
Soluble
Absorbent
Synthetic
Polymer
Sponge