Surface studies on superhydrophobic and oleophobic polydimethylsiloxane–silica nanocomposite coating system
Abstract(#br)Superhydrophobic and oleophobic polydimethylsiloxane (PDMS)–silica nanocomposite double layer coating was fabricated by applying a thin layer of low surface energy fluoroalkyl silane (FAS) as topcoat. The coatings exhibited WCA of 158–160° and stable oleophobic property with oil CA of 79°. The surface morphology was characterized by field emission scanning electron microscopy (FESEM) and surface chemical composition was determined by energy dispersive X-ray spectrometery (EDX) and X-ray photoelectron spectroscopy (XPS).