Hard coating films based on organosilane-modified boehmite nanoparticles under UV/thermal dual curing

• Published in: Thin solid films Vol. 516; no. 12; pp. 3904 - 3909
• Main Authors: Jeon, Seong Je, Lee, Jai Joon, Kim, Woong, Chang, Tae Sun, Koo, Sang Man
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 30.04.2008; Elsevier Science
• Subjects: Applied sciences; Boehmite znanoparticle; Cross-disciplinary physics: materials science; rheology; Design. Technologies. Operation analysis. Testing; Electronics; Exact sciences and technology; Hard coating; Infrared spectroscopy; Integrated circuits; Materials science; Microelectronic fabrication (materials and surfaces technology); Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Organosilane; Physics; Scanning electron microscopy; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; UV/thermal curing; Wear; Organosilane; Scanning electron microscopy; Infrared spectroscopy; Wear; Hard coating; UV/thermal curing; Boehmite znanoparticle; Silanes; Transparency; Visible spectra; Mechanical properties; Hardness; Deposition process; Thin films; Nanoparticles; Microelectronic fabrication; Nanocomposites; Curing; Boehmite; Nanostructured materials
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2007.07.165

Hard coating sols and films were prepared for UV/thermal dual curing. The coating sols were composed of boehmite nanoparticles modified with organosilanes (e.g. methacryloxy-propyl trimethoxy silane, vinyl triethoxy silane, and 3-glycidoxy-propyltrimethoxy silane), a formulated initiator, and an inorganic or organic cross-linker as an additive. With this coating solution, hard coating films with a pencil hardness above 8H and transparency above 90% in the visible light range were prepared on poly(methyl methacrylate) substrates. In addition, the coating solution could be quickly cured in 35 min at a temperature of 100 °C by UV/thermal dual curing. The effects of the additive and initiator on the hardness and transparency of the resulting films are described.