Abstract
Polymer hydrogels (PHGs) are materials bearing functional loving water for their water absorption and retention, which makes them highly valuable in agriculture, drug delivery, Environmental pollution, and other related fields. Their performance depends on synthesis parameters such as monomer composition, cross-linking density, initiator type, ion concentration, and functional group diversity. This review evaluates strategies to improve salinity tolerance, swelling kinetics, reusability, and overall efficiency. It also highlights emerging directions including AI-assisted design, quantum-informed modeling, multi-responsive materials, and bio-interactive systems that enable next-generation PHGs with enhanced performance and sustainability. Nevertheless, challenges such as reduced efficiency under saline conditions, mechanical instability during repeated use, and elevated production costs hinder broader application. Integration of computational tools, sustainable manufacturing, and interdisciplinary collaboration offers a pathway toward environmentally friendly PHGs with transformative potential in clean water technologies, precision agriculture, energy .storage, and biomedical engineering.
Keywords
Cross-linking Density
Hydrophilic Functional roups
Polymer Hydrogels
Raw Material.
Swelling Kinetics