Researchers from the University of Konstanz’s Collaborative Research Centre (CRC) 1214 “Anisotropic Particles as Building Blocks: Tailoring Shape, Interactions and Structures” successfully generate uniform-shape nano-crystals using direct polymerization.
Based on a news that University of Konstanz published, A team of researchers from this University “Anisotropic Particles as Building Blocks: Tailoring Shape, Interactions and Structures”, which has been funded by the German Research Foundation (DFG) since 2016, has demonstrated a new aqueous polymerization procedure for generating polymer nanoparticles with a single chain and uniform shape, which, as another difference to previous methods, involves high particle concentrations. A corresponding paper entitled “Uniform shape monodisperse single chain nanocrystals by living aqueous catalytic polymerization” is due for open access online publication in Nature Communications on 13.06.2019.
Nanoparticles are the building blocks for envisioned nanoparticle-based materials with yet unachieved optical, electronic and mechanical properties.
To build nanomaterials, nanoparticles with uniform shapes and sizes are required. While inorganic metal or metal oxide nanoparticles suitable for assembly can be generated in a variety of shapes, it has been very difficult until now to manufacture polymer nanoparticles in shapes other than spheres, as Stefan Mecking, Professor of Chemical Materials Science at the University of Konstanz’s Department of Chemistry and Vice Speaker of CRC 1214, points out: “In previous approaches, single-chain particles were prepared by post-polymerization collapse or assembled from solutions of separately synthesized chains. What we have managed to do is to demonstrate direct polymerization to single-chain uniform-shape monodisperse nanocrystals for polyethylene, which is the largest and most important synthetic polymer material”.
One major challenge associated with this approach is to achieve living chain and particle growth that can be sustained for several hours and up to very high molecular weights, ideally yielding single-chain nanocrystals of ultra-high molecular weight polyethylene.
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