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Non-Scratch, Antibacterial And Self-cleaning SiO2/TiO2 Nano Composite Coating on Surgical Tools By Sol-Gel

Ahmadi, Mohammad Hossein | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 44482 (56)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Ghorbani, Mohammad
  7. Abstract:
  8. In this study TiO2/SiO2 thin films were prepared by sol-gel method from Tetra isopropylortho Titanate(TIPT) as the principle of TiO2 material with Tera ethoxysilane(TEOS) as the principle of SiO2 material to achieve high scratch-resistant , antibacterial and self-cleaning surface area under the effect of various percentage of SiO2 . Film deposition was carried out using a dip-coating technique and heat-treatment was used at 700ºC to achieve crystalline of films with excellent adherence the of substrate.
    The surface morphology of the films has been observed by Scanning Electron Microscope (SEM) and the tribological properties of the surface were investigated by Atomic Force Microscope (AFM) equipped with Nano-indentation instrument. The crystal structure was characterized by X-ray diffraction(XRD), the surface hydrophilic properties were investigated by Contact Angle Test and Antibacterial properties of surface were investigated by Antibacterial Test.
    The results indicate that scratch resistant, self-cleaning or hydrophilic properties have been increasing by adding SiO2 and the antibacterial property has been decreasing by adding SiO2 . among all samples composite 15% SiO2 composite has the best function
  9. Keywords:
  10. Scratch Rsistance ; Antibacterials ; Sol-Gel Method ; Thin Films ; Self-Cleaning ; Surgical Tools ; Titanium Oxide Coating

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