2011 Annual Meeting

(642b) Colloidal Silica Dispersions In Aqueous Media: Nanoparticle Surface Modification by Amphiphilic Polymers and Organic Solvents

Authors

Paschalis Alexandridis - Presenter, State Univ of New York-Buffalo
Vinithra Venugopal - Presenter, University at Buffalo - The State University of New York (SUNY)
Andrew Bodratti - Presenter, University at Buffalo - The State University of New York (SUNY)
Marina Tsianou - Presenter, University at Buffalo - The State University of New York (SUNY)


We consider colloidal dispersions of silica nanoparticles in aqueous media containing poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) amphiphilic block copolymers (Pluronics), with a specific interest on how solution conditions such as temperature, pH, and the presence of polar organic solvents affect the amphiphile organization on the nanoparticle surface and the ensuing interactions between nanoparticles.