Superabsorbent polymers (SAP) can absorb and retain a huge amount of liquid relative to their mass. Water-superabsorbent polymers which are classified as the hydrogel when cross-linked, absorb aqueous solutions through hydrogen bonding with water molecules. The largest use of SAPs is found in personal disposable hygiene products.

For Water Beads project, we needed to have our design in shape and composition. Therefore we decided to synthesize our SAP. We tried various compositions and cross-linking methods. The best result was for cross-linking Acrylic Acid with Gelatin methacrylate (GelMA) By UV radiation. The swelling kinetic of different GelMA percentage and UV exposer time were investigated.