Hydrogels are a cross-linked, three-dimensional network of synthetic or organic polymer chains that contain 90% water. The capability of hydrogels of holding a significant amount of water and their softness make them flexible, hydrophilic in nature, and unique. Sodium polyacrylate, polyvinyl alcohol, acrylate polymers, and copolymers are ingredients widely used during the manufacture of hydrogels. 更多
