We report two synthesis strategies to produce hybrid Janus nanoparticles. The first approach is based on the layered silicate kaolinite. As a consequence of its crystal structure, the two opposing basal planes, the tetrahedral (TS) and the octahedral (OS) surface, are capped by different functional groups. The TS was selectively modified by cation exchange with PDMAEMA-b-PS  while on the OS PMMA chains were covalently anchored via catechol groups. These Janus particles show excellent interfacial activity in solvent-cast films of PS<b>-</b>PMMA blends.<br/><br/>In the second approach we produce Janus nanoparticles with a silica core and a unilaterally attached polymer corona The synthesis is based on a modified version of the Pickering emulsion polymerization technique in combination with surface-initiated atom transfer radical polymerization (ATRP) in a “grafting from” approach. Poly(vinyl acetate) (PVAc) latex particles are prepared via Pickering emulsion polymerization.stabilized by 30 nm silica nanoparticles After modification of the exposed side of the particles through chemisorption of an ATRP initiator and the removal of the particles from the interface, PDMAEMA chains are grown from this modified side of the silica particles, yielding a stimuli–responsive PDMAEMA hemicorona. We demonstrate a peculiar self-assembly behavior of the Janus particles into linear strings at low pH and high concentration.

Hybrid Janus nanoparticles by ATRP

254th National Meeting (2017)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.