Surface studies on superhydrophobic and oleophobic polydimethylsiloxane-silica nanocomposite

Basu, Bharathibai J and Dinesh Kumar, V and Anandan, C (2012) Surface studies on superhydrophobic and oleophobic polydimethylsiloxane-silica nanocomposite. Applied Surface Science, 261 . pp. 807-814. ISSN 0042-207X

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Abstract

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). FESEM images of the coatings showed micro-nano binary structure. The improved oleophobicity was attributed to the combined effect of low surface energy of FAS and roughness created by the random distribution of silica aggregates. This is a facile, cost-effective method to obtain superhydrophobic and oleophobic surfaces on larger area of various substrates.

Item Type: Journal Article
Additional Information: Copyright to this article belongs to M/s. Elsevier Publisher
Uncontrolled Keywords: Superhydrophobic;Oleophobic;PDMS;Nanocomposite;WCA;Oil CA
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Composite Materials
Division/Department: Surface Engineering Division, Surface Engineering Division, Surface Engineering Division
Depositing User: Ms. Alphones Mary
Date Deposited: 20 Mar 2013 13:00
Last Modified: 06 Aug 2015 14:11
URI: http://nal-ir.nal.res.in/id/eprint/11515

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