{
    "content": "The monomer structures used for synthesizing hydrophilic polymers include polyglycerol comprising at least two glycerol units and natural oils which contain triglycerides of aliphatic monocarboxylic acids; functional groups such as hydroxyl groups in polyglycerols and fatty acids enhance the hydrophilicity of the corresponding polymers by forming strong hydrogen bonds with water molecules, thereby increasing water affinity and reducing the surface tension of the polymer."
}