Effect of silica and heat treatment on PS-SiO2 wetting behavior

Edna , Richard and Maria, Shalini and Anandan, C and Basu, Bharathibai J and Aruna, ST (2013) Effect of silica and heat treatment on PS-SiO2 wetting behavior. Surface Innovations, 1 (S12). pp. 105-111.

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    Abstract

    The wetting behavior of solid surfaces by a liquid is a very important aspect of surface chemistry and surface geometrical structure. In the present study, polystyrene-silica (PS-SiO2) nanocomposite coatings with varying degrees of wettability are prepared by a simple and cheap spraying process without the use of sophisticated equipments. Both PS and SiO2 are cheaper and readily available chemicals. Silica source, silica content and heat-treatment temperatures are varied to modulate the surface wettability of the composite coatings. These variations resulted in surfaces with hydrophilic, hydrophobic, superhydrophobic and sticky hydrophobic properties. The coatings are characterized for contact angle, sliding angle, surface roughness, hardness and adhesion. The microstructure of the coatings was studied by using fi eld emission scanning electron microscopy. The results indicate that the surface prepared by 1:2 (PS:SiO2) composition and dried at room temperature exhibited hydrophilic properties. The same surfaces on heat treatment exhibited superhydrophobic property, and with time, one of the silica surfaces became sticky hydrophobic.

    Item Type: Journal Article
    Uncontrolled Keywords: Effect of silica and heat treatment on PS-SiO2
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Other, Other, Surface Engineering Division, Surface Engineering Division, Surface Engineering Division
    Depositing User: Ms Indrani V
    Date Deposited: 18 Mar 2013 13:42
    Last Modified: 06 Aug 2015 14:08
    URI: http://nal-ir.nal.res.in/id/eprint/11508

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