Article (Scientific journals)
Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide
Parilti, Rahmet; Alaimo, David; Grignard, Bruno et al.
2017In Journal of Materials Chemistry B, 5 (29), p. 5806-5815
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Keywords :
supercritical carbon dioxide; organic nanoparticle
Abstract :
[en] 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.
Research center :
CESAM Complex and Entangled Systems from Atoms to Materials (CESAM)
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Parilti, Rahmet ;  University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Alaimo, David;  University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Grignard, Bruno ;  University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Boury, Frank;  University of Angers, CRCINA INSERM-UMR1232 Cancer and Immunology Research Centre, France
Howdle, Steven M.;  University of Nottingham, School of Chemistry, UK
Jérôme, Christine  ;  University of Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM), Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide
Publication date :
07 August 2017
Journal title :
Journal of Materials Chemistry B
ISSN :
2050-750X
eISSN :
2050-7518
Publisher :
Royal Society of Chemistry
Volume :
5
Issue :
29
Pages :
5806-5815
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
The Erasmus Mundus Joint Doctorate Nanofar Program
Available on ORBi :
since 17 August 2017

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