2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

Partnering Events:

TechConnect Summit
Clean Technology 2008

Super hydrophobic films based on organic-inorganic hybrid coatings -

A.R. Phani, P. De Marco, S. Santucci
CASTI, CNR-INFM Regional Laboratory, IT

Keywords:
sol-gel process, hydrophobicity, scratch resistance, friction coefficient, atomic force microscopy, roughness, inorganic-organic hybrid films

Abstract:
Organic-inorganic hybrid materials can offer multifunctional properties tailoring from submicrometer to nanometer length scales in various applications such as micro and nano photonic devices including, waveguides, light emitting devices, quantum dot devices, photonic band gaps and holographic materials. In the present investigation, hybrid materials based on polydimethoxy silane, perfluorolky silanes and fluorine based polymers were spin coated on to different substrates glass, quartz, and polycarbonate substrates at room temperature. The deposited films have been cured under UV irradiation for better polymerization followed by annealing at 100oC (polycarbonate), 200oC and 300oC for 30 minutes. To improve the scratch resistance properties of these coatings nanoscale Silica colloidals have been incorporated into the matrix by sol-gel process. UV-visible spectroscopy (UV-vis), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) have been used for optical absorbance, vibrational and stretching bands, and phase formation of the deposited of the films, respectively. The deposited films are transparent, hard, scratch resistance and in particular hydrophobic. Friction coefficient measurements have been carried out by using steel and Al2O3 as counter bodies. Adhesion strength failure and hardness measurements on plastic substrates were examined by using scratch resistance tester and nanohardness tester, respectively.


Nanotech 2008 Conference Program Abstract