Approach to achieve controlled particle size synthesis of nonpolar functionalised siloxane particles using a one-pot synthesis

Rowan McDonough, Daniel Mangos, Chris Hassam, Jonathan Campbell, David A. Lewis

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
16 Downloads (Pure)

Abstract

The homogeneous addition of functional silanes dissolved in a co-solvent such as ethanol has been shown to change particle growth mechanisms as well as control over particle size and dispersity, especially for non-polar silanes. Highly monodisperse size-controlled silica particles from 50 to over 1000 nm bearing thiol, vinyl, phenyl, propyl, cyanopropyl and chloropropyl R group functionality were synthesised directly from the corresponding single organosilane source. Observing particle growth over time revealed that it proceeded by a conventional Stöber process, where silane monomers and oligomers add to nucleation sites, resulting in particle growth. Scale-up of the homogeneous mixing approach produced gram quantities of particles without affecting size, size dispersion or functionality under good mixing. The presence and functionality of the surface R groups were confirmed by a simple second addition of reactive molecules to the particle synthesis liquor, resulting in theoretical maximum attachment densities.
Original languageEnglish
Pages (from-to)719-729
Number of pages11
JournalAustralian Journal of Chemistry
Volume76
Issue number10
DOIs
Publication statusPublished - 20 Oct 2023

Keywords

  • click
  • functionalisation
  • homogeneous
  • interfacial
  • monodisperse
  • nanoparticle
  • non-polar siloxane
  • one-pot
  • organosilane
  • size control
  • Stöber process

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