1：Experimental Design and Method Selection:

The study used double liquid phase spray deposition to prepare composite films, involving dip-coating of silicone resin and spray-coating of TiO2 dispersion. The initial curing time (ICT) of silicone resin was varied to control film properties. Hydrodynamic erosion tests and photocatalytic degradation experiments were conducted to evaluate durability and activity.

2：Sample Selection and Data Sources:

Glass slides (76 mm × 26 mm) were used as substrates. Samples were categorized into four groups (S-1 to S-4) based on ICT (10, 20, 30, 40 min). Data included SEM images for morphology analysis and spectrophotometric measurements for photocatalytic activity.

3：List of Experimental Equipment and Materials:

Equipment included an airbrush with air compressor and pressure gauge for spraying, rotary vane instrument with turbine-type agitator for erosion tests, SEM for morphology observation, UV lamp (18 W) for photocatalytic experiments, and portable sphere spectrophotometer (SP60, X-Rite) for color measurement. Materials included silicone resin (methyl phenyl polysiloxane), TiO2 nanoparticles (anatase, mean diameter 30 nm), isopropanol, ethanol, curing agent (KH550 silane coupling agent), and rhodamine B.

4：Experimental Procedures and Operational Workflow:

Glass slides were cleaned and dip-coated with silicone resin solution at a constant speed. After initial curing for specified ICT, TiO2 dispersion was spray-coated. Films were fully cured in an oven. Hydrodynamic erosion was performed for 4 weeks at 60 rpm with samples fixed at 45°. SEM images were taken weekly. Photocatalytic activity was assessed by coating films with RhB solution, drying, and irradiating with UV light while measuring color changes over time.

5：5°. SEM images were taken weekly. Photocatalytic activity was assessed by coating films with RhB solution, drying, and irradiating with UV light while measuring color changes over time. Data Analysis Methods:

5. Data Analysis Methods: SEM images were binarized and denoised using MATLAB to calculate effective TiO2 coverage ratio (CR). Photocatalytic degradation efficiency was determined from color value variations measured by spectrophotometer.