Facile preparation of a high-transparency zwitterionic anti-fogging poly(SBMA-co-IA) coating with self-healing property

Hydrophilic anti-fogging coating has become a research hotspot due to its good anti-fogging performance and easy preparation. In this work, a zwitterionic anti-fogging coating with anti-fouling and self-healing properties was prepared by (Methacryloyloxy)ethyldimethyl-(3-sulfopropyl) (SBMA) and Itaconic acid (IA). And the antifogging performance of the coating has been improved due to -COOH from IA. The high light transmittance (over 95%) can be observed after anti-fogging test. We use amide bonds to connect the coating to the glass slide, which greatly improves the water resistance and durability. The coated glass can maintain anti-fogging property after being immersed in water for 7 days or stored for over 200 days. Results show that the anti-fogging coating has good self-healing function and oil stain resistance. The contact angle of the coated glass slide is 8.17°, and shows a good super hydrophilicity. This anti-fogging coating provides great potential for applications in medical, food industry, transportation .etc.