Iron Oxide/Polymer Core–Shell Nanomaterials with Star-like Behavior
Embedding nanoparticles (NPs) with organic shells is a way to control their aggregation behavior. Using polymers allows reaching relatively high shell thicknesses but suffers from the difficulty of obtaining regular hybrid objects at gram scale. Here, we describe a three-step synthesis in which mult...
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MDPI AG
2021-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/9/2453 |
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| author | Virginie Vergnat Benoît Heinrich Michel Rawiso René Muller Geneviève Pourroy Patrick Masson |
| author_facet | Virginie Vergnat Benoît Heinrich Michel Rawiso René Muller Geneviève Pourroy Patrick Masson |
| author_sort | Virginie Vergnat |
| collection | DOAJ |
| description | Embedding nanoparticles (NPs) with organic shells is a way to control their aggregation behavior. Using polymers allows reaching relatively high shell thicknesses but suffers from the difficulty of obtaining regular hybrid objects at gram scale. Here, we describe a three-step synthesis in which multi-gram NP batches are first obtained by thermal decomposition, prior to their covalent grafting by an atom transfer radical polymerization (ATRP) initiator and to the controlled growing of the polymer shell. Specifically, non-aggregated iron oxide NPs with a core principally composed of γ-Fe<sub>2</sub>O<sub>3</sub> (maghemite) and either polystyrene (PS) or polymethyl methacrylate (PMMA) shell were elaborated. The oxide cores of about 13 nm diameter were characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM), and small-angle X-ray scattering (SAXS). After the polymerization, the overall diameter reached 60 nm, as shown by small-angle neutron scattering (SANS). The behavior in solution as well as rheological properties in the molten state of the polymeric shell resemble those of star polymers. Strategies to further improve the screening of NP cores with the polymer shells are discussed. |
| first_indexed | 2024-03-10T07:22:26Z |
| format | Article |
| id | doaj.art-aab637dc27614b7dbe62c38473fdc355 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T07:22:26Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-aab637dc27614b7dbe62c38473fdc3552023-11-22T14:32:48ZengMDPI AGNanomaterials2079-49912021-09-01119245310.3390/nano11092453Iron Oxide/Polymer Core–Shell Nanomaterials with Star-like BehaviorVirginie Vergnat0Benoît Heinrich1Michel Rawiso2René Muller3Geneviève Pourroy4Patrick Masson5Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Université de Strasbourg, UMR7504, 23 Rue du Lœss, BP 43, 67034 Strasbourg, FranceInstitut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Université de Strasbourg, UMR7504, 23 Rue du Lœss, BP 43, 67034 Strasbourg, FranceInstitut Charles Sadron (ICS), CNRS, Université de Strasbourg, UPR 22, 23 Rue du Lœss, BP 84047, 67034 Strasbourg, FranceInstitut Charles Sadron (ICS), CNRS, Université de Strasbourg, UPR 22, 23 Rue du Lœss, BP 84047, 67034 Strasbourg, FranceInstitut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Université de Strasbourg, UMR7504, 23 Rue du Lœss, BP 43, 67034 Strasbourg, FranceInstitut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Université de Strasbourg, UMR7504, 23 Rue du Lœss, BP 43, 67034 Strasbourg, FranceEmbedding nanoparticles (NPs) with organic shells is a way to control their aggregation behavior. Using polymers allows reaching relatively high shell thicknesses but suffers from the difficulty of obtaining regular hybrid objects at gram scale. Here, we describe a three-step synthesis in which multi-gram NP batches are first obtained by thermal decomposition, prior to their covalent grafting by an atom transfer radical polymerization (ATRP) initiator and to the controlled growing of the polymer shell. Specifically, non-aggregated iron oxide NPs with a core principally composed of γ-Fe<sub>2</sub>O<sub>3</sub> (maghemite) and either polystyrene (PS) or polymethyl methacrylate (PMMA) shell were elaborated. The oxide cores of about 13 nm diameter were characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM), and small-angle X-ray scattering (SAXS). After the polymerization, the overall diameter reached 60 nm, as shown by small-angle neutron scattering (SANS). The behavior in solution as well as rheological properties in the molten state of the polymeric shell resemble those of star polymers. Strategies to further improve the screening of NP cores with the polymer shells are discussed.https://www.mdpi.com/2079-4991/11/9/2453hybrid materialsnon-aggregated nanoparticlesgrafting from methodX-ray scatteringneutron scatteringstar polymers |
| spellingShingle | Virginie Vergnat Benoît Heinrich Michel Rawiso René Muller Geneviève Pourroy Patrick Masson Iron Oxide/Polymer Core–Shell Nanomaterials with Star-like Behavior Nanomaterials hybrid materials non-aggregated nanoparticles grafting from method X-ray scattering neutron scattering star polymers |
| title | Iron Oxide/Polymer Core–Shell Nanomaterials with Star-like Behavior |
| title_full | Iron Oxide/Polymer Core–Shell Nanomaterials with Star-like Behavior |
| title_fullStr | Iron Oxide/Polymer Core–Shell Nanomaterials with Star-like Behavior |
| title_full_unstemmed | Iron Oxide/Polymer Core–Shell Nanomaterials with Star-like Behavior |
| title_short | Iron Oxide/Polymer Core–Shell Nanomaterials with Star-like Behavior |
| title_sort | iron oxide polymer core shell nanomaterials with star like behavior |
| topic | hybrid materials non-aggregated nanoparticles grafting from method X-ray scattering neutron scattering star polymers |
| url | https://www.mdpi.com/2079-4991/11/9/2453 |
| work_keys_str_mv | AT virginievergnat ironoxidepolymercoreshellnanomaterialswithstarlikebehavior AT benoitheinrich ironoxidepolymercoreshellnanomaterialswithstarlikebehavior AT michelrawiso ironoxidepolymercoreshellnanomaterialswithstarlikebehavior AT renemuller ironoxidepolymercoreshellnanomaterialswithstarlikebehavior AT genevievepourroy ironoxidepolymercoreshellnanomaterialswithstarlikebehavior AT patrickmasson ironoxidepolymercoreshellnanomaterialswithstarlikebehavior |