{
    "content": "The monomer acrylamide possesses a functional amide group, while acrylic acid contains a carboxylic acid group, both of which enhance the hydrophilicity of the resulting polymers by increasing hydrogen bonding interactions with water, thereby enhancing water absorption and retention in the hydrogels.The monomers used for synthesizing hydrophilic polymers include acrylamide (AAm), N-isopropylacrylamide (NIPAm), and acrylic acid (AAc), where the -C(O)OH group in acrylic acid enhances the hydrophilicity of the polymers by providing strong hydrogen bonding interactions with water, while the amide groups in acrylamide and N-isopropylacrylamide facilitate dipole-dipole interactions and hydrogen bonding with water, thereby improving the overall affinity of the polymers for moisture."
}