Fig. 1. Flow chart of anti-fogging films preparation

Fig. 2. Relationship between absorbed dose, PVA concentration, and PVA loading rate

Fig. 3. FTIR spectra of original PET films and PET-PVA films

Fig. 4. Surface SEM images of PET-PVA films with different loading rates

Fig. 5. UV-vis spectra of original PET film and PET-PVA (12.43%) film (The illustration shows the photograph of PET-PVA (12.43%) film)

Fig. 6. Anti-fogging performance tests on original PET film and PET-PVA (12.43%) film: (a) high temperature and high humidity condition; (b) low temperature freezing condition

Fig. 7. Contact angles of PET-PVA films with different loading rates

Fig. 8. Saturated water absorption of PET-PVA films with different loading rates

Fig. 9. Schematic diagram of anti-fogging