Surface properties of polydimethylsiloxane-based inorganic/organic hybrid films deposited on polyimide sheets by the sol-gel method

摘要

Polydimethylsiloxane (PDMS)-based inorganic/organic hybrids films were prepared on polyimide sheets by the sol-gel method using silanol-terminated PDMS and titanium tetraisopropoxide as starting materials. The effect of heat-treatment temperature on the surface property of the hybrid films was examined in terms of contact angle of water and Tapping-Mode Atomic Force. Microscopy (AFM). AFM phase images showed the presence of domains, 200-500 nm in size, on the surface of these films after heat-treatment below 300 deg C. These regions were more hydrophilic than the rest of the area. The domains disappeared at 300 deg C and the surface became homogeneous surface of the peak to valley value, about 10 nm. It is also uniformly hydrophobic and a maximum contact angle (about 115 deg C) was obtained.