Fabrication of raspberry SiO 2/polystyrene particles and superhydrophobic particulate film with high adhesive force

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Dezhi Xu
  • Mozhen Wang
  • Xuewu Ge
  • Michael Hon-Wah Lam
  • Xueping Ge

Detail(s)

Original languageEnglish
Pages (from-to)5784-5791
Journal / PublicationJournal of Materials Chemistry
Volume22
Issue number12
Publication statusPublished - 28 Mar 2012

Abstract

We report a facile and novel strategy on the fabrication of well-defined raspberry SiO 2/polystyrene (SiO 2/PS) particles via radiation miniemulsion polymerization. Starting from methacryloxypropyltrimethoxysilane (MPS)-functionalized SiO 2 particles (176 nm), raspberry SiO 2/PS particles (257 nm) with a submicron SiO 2 core decorated by nano-sized PS latex particles (58 nm) are obtained after γ-ray induced miniemulsion polymerization of styrene (St). It is found that MPS grafted density on the surface of submicron SiO 2 particles, the weight ratio of St to SiO 2 particles (W St/o-SiO2), as well as the surfactant concentration will affect the morphology and wettability of the resultant SiO 2/PS hybrid particles. When the well-defined raspberry SiO 2/PS particles are deposited on a blank glass substrate, a dual-size roughness surface topology was observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). This film has a static water contact angle as high as 151°. However, this film exhibits a large contact angle hysteresis (∼116°) and strong adhesion to water. Furthermore, this kind of superhydrophobic particulate film can be used as a "mechanical hand" for transportation of small water droplets without loss, thus it may have potential applications in industrial fields. © The Royal Society of Chemistry 2012.

Citation Format(s)

Fabrication of raspberry SiO 2/polystyrene particles and superhydrophobic particulate film with high adhesive force. / Xu, Dezhi; Wang, Mozhen; Ge, Xuewu; Hon-Wah Lam, Michael; Ge, Xueping.

In: Journal of Materials Chemistry, Vol. 22, No. 12, 28.03.2012, p. 5784-5791.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review