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

Parilti, R. and Alaimo, D. and Grignard, B. and Boury, F. and Howdle, S.M. and Jerome, C. (2017) Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide. Journal of Materials Chemistry B, 5 . pp. 5806-5815. ISSN 2050-750X

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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.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Chemistry
Identification Number: 10.1039/C7TB00740J
Depositing User: Smith, Ruth
Date Deposited: 08 Sep 2017 11:15
Last Modified: 11 Sep 2017 14:31
URI: http://eprints.nottingham.ac.uk/id/eprint/45570

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