6533b860fe1ef96bd12c2dad
RESEARCH PRODUCT
Synthesis, characterization and fine-tuning of bimodal poly(organosiloxane) nanoparticles
Robert GrafS. ScholzAndreas F. ThünemannStefanie UtechStefanie UtechMichael MaskosMichael MaskosP. KindervaterChristian SchererChristian SchererSergey Noskovsubject
Condensation polymerHydrodynamic radiusMaterials sciencePolymers and PlasticsOrganic ChemistryNanoparticleRadiusChemical engineeringPulmonary surfactantParticle-size distributionPolymer chemistryMaterials ChemistryParticleSol-geldescription
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 26 nm radii and larger nanoparticles with 60 nm 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-10-01 | Polymer |