{
    "content": "The hydrophilic polymer of the anti-fog layer can include polyvinyl alcohol, polyvinyl acetal, polyvinyl acetate, polyvinylpyrrolidone, polyethylene oxide, polyacrylamide, polyester, polyurethane, cellulose acetate, hydroxyethyl cellulose, hydroxymethyl cellulose, or gelatin, with hydrophilic segments such as alkylene oxides, lactones, lactams, or combinations thereof, and these functional groups enhance interactions with water through hydrogen bonding, promoting solubility and increased water affinity.The hydrophilic polymer comprises a polymer having a polyurethane backbone and hydrophilic segments covalently bonded to the polyurethane backbone, with the hydrophilic segments including alkylene oxides, lactones, lactams, and combinations thereof, enhancing interactions with water through their polar functional groups, which promote hydrogen bonding and water solubility.The hydrophilic polymer in the transparent composite comprises a polyurethane backbone with hydrophilic segments that include alkylene oxides, lactones, lactams, or combinations thereof, which enhance interactions with water through the presence of polar functional groups capable of forming hydrogen bonds."
}