Preparation and characterization of polyoxidepropylene modified SiO2 antireflective film

The polyoxypropylene glycerol ether(PO) modified silica coating films were prepared by sol-gel method. FTIR, Uv/Vis, AFM and contact angle measurements were used to characterize the physical properties of the thin films. The results show that PO addition has no effect on the transmittance of the film. The transmittance can easily reach 99.5% at 1000 nm. AFM profiles of the unmodified and modified films were the same. The contact angle with water for the unmodified and modified silica films were 28.5 degrees and 68.5 degrees, respectively. When the films were placed in humid atmosphere for 30 d, transmittance loss for the unmodified and modified silica films were 2.5% and 1.0%, respectively. The modification of the silica films by PO can enhance humidity resistance of the film.