{
    "content": "The monomers used for synthesizing hydrophilic polymers include acrylic acid, poly(acrylic acid), poly(ethylene glycol), poly(2-hydroxyethyl methacrylate), and poly(carboxybetaine), which possess functional groups such as hydroxyl, carboxyl, and amine groups that enhance the hydrophilicity of the corresponding polymers by increasing hydrogen bonding and ionic interactions with water."
}