Research Information System
6. Nanobilim ve Nanoteknoloji Konferansı, İzmir, Turkey, 1 - 04 June 2010, pp.647
In this work, we present a novel method for fabricating polymer thin films containing micro-patterned spherical particles varying in the range of 400 nm to 8 ?m by dip-coating process in polymer solution. We can control the distribution of the particle size via adjusting the concentration of the PS-ran-FMA copolymer, the solvent/non-solvent ratio and withdrawal speed of dip coater. Styrene-fluoromethacrylate random copolymer were synthesized in supercritical carbondioxide (scCO2) at 250 bar and 80 oC using AIBN as a free radical initiator. It was found that the optimal concentration of polymer solution was 25 mg/mL and withdrawal speed of 41 cm/min to obtain the narrowest particle distribution on the surface. Surfaces containing the microparticles were characterized with the water contact angle measurement, optical microscopy and SEM. Superhydrophobic surfaces having a water contact angle up to 160o were obtained with this novel method.