Synthesis of Hallow Silica Nanospheres by Sacrificial Polystyrene Templates for Thermal Insulation applications

Monodisperse polystyrene (PS) spheres with controllable size have been synthesized by a straight forward and simple procedure. The as-synthesized PS spheres have a typical diameter ranging from ~180nm to ~900nm, where a reduced sphere size is obtained by increasing the polyvinylpyrrolidone (PVP)/styrene weight ratio. The PS spheres function as sacrificial templates for the fabrication of hollow silica nanospheres (HSNSs) for thermal insulation applications. By modifying the silica coating process, HSNSs with different surface roughness are obtained. All resulting HSNSs show typically a thermal conductivity of about 20mW/(mK), indicating that the surface phonon scattering is probably not significant in these HSNS samples.

Additional Info

  • WP: Advanced materials technologies
  • Publication Year: 2013
  • Journal: Andvances in Materials Science and Engineering
  • Volume: 2013
  • Number: 2013
  • Pages: 6 pages
  • Summary : Article ID 483651

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