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Issue 29, 2017
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Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide

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Abstract

Free-radical dispersion polymerisation of 2-hydroxyethyl methacrylate was carried out in supercritical carbon dioxide (scCO2) in the presence of stabilisers based on polyethylene oxide (PEO) and poly(heptadecafluorodecyl acrylate) (PFDA). Different architectures of copolymers (random, palm-tree and diblock) were tested for their surface tension, cloud point and as a stabilising agent. The diblock architecture was found to be the best candidate resulting in poly(HEMA) spherical particles with a size of 316 nm. Furthermore, the effect of the CO2-phobic block (PEO) in the diblock architecture was investigated by using three different chain lengths (1000, 2000, 5000 g mol−1). By optimizing the stabiliser composition and structure, mild reaction conditions have been identified allowing us to obtain well-defined spherical cross-linked poly(HEMA) particles with a mean diameter of unprecedented low size (216 nm) at a temperature as low as 35 °C.

Graphical abstract: Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide

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Publication details

The article was received on 17 Mar 2017, accepted on 25 Jun 2017 and first published on 26 Jun 2017


Article type: Paper
DOI: 10.1039/C7TB00740J
Citation: J. Mater. Chem. B, 2017,5, 5806-5815
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    Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide

    R. Parilti, D. Alaimo, B. Grignard, F. Boury, S. M. Howdle and C. Jérôme, J. Mater. Chem. B, 2017, 5, 5806
    DOI: 10.1039/C7TB00740J

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