High yield preparation of all-organic raspberry-like particles by heterocoagulation via hydrogen bonding interaction |
| |
Authors: | Marion Chenal Jutta Rieger Allan Philippe Laurent Bouteiller |
| |
Affiliation: | 1. Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, IPCM, Chimie des Polymères, F-75005 Paris, France;2. CNRS, UMR 8232, IPCM, Chimie des Polymères, F-75005 Paris, France;3. Univ Koblenz-Landau, Institute for Environmental Sciences, Department of Environmental and Soil Chemistry, D-76829 Landau, Germany |
| |
Abstract: | We describe here a straightforward strategy towards the high yield preparation of raspberry-like all-organic particles. Poly(acrylic acid)-b-poly(butyl acrylate) core–shell nanoparticles (D ∼ 80 nm) and larger poly(ethylene oxide)-b-poly(butyl acrylate) core–shell (D ∼ 230 nm), synthesized by RAFT emulsion polymerization, were mixed at high solids content (23 wt%) at room temperature without any particular precaution (no dropwise addition, no pH adjustment). Raspberry-like particles constituted of one central PEO-b-PBA particle surrounded by about thirty PAA-b-PBA particles were successfully obtained, with no coagulum formation. The heteroaggregation process is probably driven by the hydrogen-bond interactions between the PAA and the PEO shells of the particles. The raspberry-like particles were characterized using electron microscopy (TEM and cryo-TEM), dynamic light scattering (DLS), chromatography (HDC) and calorimetry (ITC), demonstrating the selectivity of the process. |
| |
Keywords: | Core&ndash shell nanoparticles Poly(acrylic acid) Poly(ethylene oxide) |
本文献已被 ScienceDirect 等数据库收录! |
|