The optical shielding performances and mechanisms of green flame-retardant two-component matte films under various application conditions

Herein, we meticulously investigated the optical shielding performances and mechanisms of green flame-retardant two-component waterborne polyurethane matte films based on a previous study. The relevant performances were evaluated by changing various environmental factors including nanoparticle content, pH, temperature and storage-time. Specifically, upon combination with TiO2, the ultraviolet-light transmittance was reduced to 1.9% and the 60 degrees glossiness decreased by 63%. When the pH was 8.0, the shielding efficiency and transmittance of ultraviolet light were 100% and 0%, respectively. The 60 degrees glossiness of spin-films increased with an increase in storage time. Besides, TiO2 nanoparticles were beneficial for delaying the thermal decomposition via synergistic flame retardance.

Automated summary

By adjusting environmental factors and adding nanoparticles, the coating achieved excellent shielding performance for ultraviolet light, with TiO2 nanoparticles playing a positive role in delaying the thermal decomposition process during flame retardance.