摘要
Silane functionalization is widely used for metal surface modification. This study explores the self-assembly of silane-TiO2 composite thin film on stainless steel to enhance surface properties. The coatings were systematically characterized using scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, attenuated total reflectance-Fourier transform infrared spectroscopy, and surface profiler. Structure-property relationships (hydrophobicity, adhesion strength, corrosion resistance, and hardness) were evaluated by using static water contact angle measurement, cross-cut adhesion test, acid droplet corrosion test, and Shore durometer hardness test, respectively. The incorporation of TiO2 nanoparticles within the silane matrix improved thermal stability and corrosion resistance compared to pure silane coatings. Fluorine functionalization significantly enhanced the hydrophobicity and the corresponding corrosion resistance of the TiO2@Si composite film. The TiO2@Si composite with silane:TiO2 molar ratio of 0.06:1 exhibited the best adhesion (5B), whereas higher silane concentrations led to reduced adhesion of the TiO2@Si composite films. Hardness tests revealed that the optimal hardness of composite films, 76.3 Shore D, was also achieved at a silane:TiO2 molar ratio of 0.06:1. This work provides insights into the structure-property relationships of silane-nanoparticle composite films for stainless steel surface modification, highlighting the potential for tailored functional coatings through compositional control and surface functionalization.