Preparation of UV-curable hybrid films via sol-gel synthesis for hydrophobic surface applications


JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, vol.91, no.1, pp.1-10, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 91 Issue: 1
  • Publication Date: 2019
  • Doi Number: 10.1007/s10971-019-05027-x
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1-10
  • Keywords: Sol-gel, UV curing, Hybrid coatings, Plastic substrate, Hydrophobic, HARD COATINGS, DEGRADATION
  • Akdeniz University Affiliated: Yes


This study defines the preparation and characterization of organic-inorganic hybrid films that contain fluorine. Diurethane dimethacrylate (DUDMA) was used as the organic portion, and 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (FTS) and 3-(trimethoxysilyl) propyl methacrylate (MEMO) were used as the inorganically rich portion. MEMO, found in the organic portion, is bonded to FTS by means of Si-O-Si bonds in the hybrid formulation and, on the other hand, is added to the polymerization together with DUDMA during the ultraviolet (UV)-curing process. Primarily hydrolysis and condensation reactions were formed between the sol-gel primers FTS and MEMO, and film solutions were then acquired by adding the organic portion to this mixture. The UV curing was done by applying these solutions to the polycarbonate (PC) surfaces. The degree of polymerization of the obtained films was monitored with the Fourier-transform infrared spectroscopy analysis. The thermogravimetric analysis as the thermal test was conducted over the free films. Mechanical tests such as cross-cut, pencil, and Newton hardness; scanning electron microscopy examinations; and optical characterizations and contact angle measurements were conducted over the film on the PC surface. With the hybrid films created on the PC surfaces, mechanical, highly durable, hydrophobic, and easy to clean films were acquired only with UV curing without requiring any thermal curing, and these films do not change the optical and visual properties of the PC surface in a significant scale. The conclusion was reached maximum at 112 degrees water contact angle (WCA) and 4N hardness value, and had almost the same visual properties as the uncoated PC surface.