HydrogelA hydrogel is a solid, jelly-like material that can vary from soft and weak to hard and tough. By weight, gels are mostly liquid, yet they behave like solids.
Gels consist of a solid three-dimensional network that spans the volume of a liquid medium and ensnares it through surface tension effects.

Here are some simple activities to show demonstrate a few of the properties of hydrogels.

(Revised version with 2 new experiments – 17/02/2014)

Hydrogel – Experiment Guide

Hydrogel – Teacher/TechnicianGuide

Hydrogel – Introductory powerpoint