{
    "content": "The monomers used for synthesizing hydrophilic polymers include 4-Hydroxybutyl acrylate (HBA), acrylic acid, and poly(ethylene glycol) methyl ether acrylate (PEGA), with functional groups such as hydroxyl (-OH) in HBA and carboxylic acid (-COOH) in acrylic acid that enhance hydrophilicity by forming hydrogen bonds and ion-dipole interactions with water molecules, leading to increased polymer-water interactions."
}