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Synthesis, characterization and fine-tuning of bimodal poly(organosiloxane) nanoparticles

Authors
Journal
Polymer
0032-3861
Publisher
Elsevier
Publication Date
Volume
51
Issue
23
Identifiers
DOI: 10.1016/j.polymer.2010.09.065
Keywords
  • Nanoparticles
  • Polyorganosiloxane
  • Field-Flow Fractionation (Fff)
Disciplines
  • Design

Abstract

Abstract The acid catalyzed sol–gel type synthesis of polyorganosiloxane core-shell nanoparticles with removable PDMS core in aqueous dispersion leads to the inherent formation of a bimodal size distribution with smaller spheres having approximately 26nm radii and larger nanoparticles with 60nm in radius. The origin of the self-organized bimodality is investigated and finally attributed to a combination of stabilization of the growing particles due to i) a miniemulsion-type stabilization by the ultrahydrophobe PDMS and ii) by surface co-stabilization by the employed surfactant. The significant influence of temperature, pH, stirrer speed and amount of the surfactant on the particle sizes allows for the design and fine-tuning of different nanoparticles sizes and distributions.

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