الفهرس 
ContentsOnly 14 pages are availabe for public view
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Abstract
Superhydrophobic surfaces (SHS) are often found in nature, such as on plant leaves, insect legs and wings .Water on these surfaces forms small beads with a high contact angle in excess of 150° and drips off rapidly when the surfaces are slightly inclined, while taking away powder-like contaminant. This interesting phenomenon has stimulated extensive research to make artificial superhydrophobic surfaces and to use them for a variety of applications.
Erbil’s method is considered as one of the simplest and most common process for preparation of superhydrophobic polypropylene surfaces .It depends mainly on solvent used and thermal treatment which would result in very high contact angles.
In this study, the effect of several factors on the preparation of superhydrophobic surfaces have been studied. These factors include Polypropylene concentration, PP dissolution heating rate, solvent evaporation rate and addition of different concentration of Ti02 nanoparticles. The effects of all of these factors have been studied using DSC, FT1R, SEM and Contact angle measurement.
This study showed that the ideal parametes for PP superhydrophobic surface formation are the following: concerning the PP concentration, 40 mg / 2ml of solvent was found to be the best one, 3.5°C/min is the best dissolution heating rate and 70°C is the best temperature for solvent evaporation. For Ti02 as the concentration of TiQ2 increases, the contact angles decrease, but