Magnetic Polyurea Nano-Capsules Synthesized via Interfacial Polymerization in Inverse Nano-Emulsion
1
Institute of Chemistry, Casali Centre of Applied Chemistry and Centre for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
2
Department of Entomology-Chemistry, Agricultural Research Organization, Volcani Centre, Rishon Lezion 7505101, Israel
*
Author to whom correspondence should be addressed.
Academic Editors: Marinella Striccoli, Roberto Comparelli and Annamaria Panniello
Molecules 2019, 24(14), 2663; https://doi.org/10.3390/molecules24142663
Received: 17 June 2019
/
Revised: 16 July 2019
/
Accepted: 18 July 2019
/
Published: 23 July 2019
(This article belongs to the Special Issue Nanocomposites of Polymers and Inorganic Particles)
Polyurea (PU) nano-capsules have received voluminous interest in various fields due to their biocompatibility, high mechanical properties, and surface functionality. By incorporating magnetic nanoparticle (MNPs) into the polyurea system, the attributes of both PU and MNPs can be combined. In this work, we describe a facile and quick method for preparing magnetic polyurea nano-capsules. Encapsulation of ionic liquid-modified magnetite nanoparticles (MNPs), with polyurea nano-capsules (PU NCs) having an average size of 5–20 nm was carried out through interfacial polycondensation between amine and isocyanate monomers in inverse nano-emulsion (water-in-oil). The desired magnetic PU NCs were obtained utilizing toluene and triple-distilled water as continuous and dispersed phases respectively, polymeric non-ionic surfactant cetyl polyethyleneglycol/polypropyleneglycol-10/1 dimethicone (ABIL EM 90), diethylenetriamine, ethylenediamine diphenylmethane-4,4′-diisocyanate, and various percentages of the ionic liquid-modified MNPs. High loading of the ionic liquid-modified MNPs up to 11 wt% with respect to the dispersed aqueous phase was encapsulated. The magnetic PU NCs were probed using various analytical instruments including electron microscopy, infrared spectroscopy, X-ray diffraction, and nuclear magnetic spectroscopy. This unequivocally manifested the successful synthesis of core-shell polyurea nano-capsules even without utilizing osmotic pressure agents, and confirmed the presence of high loading of MNPs in the core.
View Full-Text
Keywords:
polyurea nano-capsules; magnetic nanoparticles; nano-emulsions; interfacial polymerization; composite nanomaterials
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
- Supplementary File 1:
PDF-Document (PDF, 4087 KiB)
MDPI and ACS Style
Natour, S.; Levi-Zada, A.; Abu-Reziq, R. Magnetic Polyurea Nano-Capsules Synthesized via Interfacial Polymerization in Inverse Nano-Emulsion. Molecules 2019, 24, 2663. https://doi.org/10.3390/molecules24142663
AMA Style
Natour S, Levi-Zada A, Abu-Reziq R. Magnetic Polyurea Nano-Capsules Synthesized via Interfacial Polymerization in Inverse Nano-Emulsion. Molecules. 2019; 24(14):2663. https://doi.org/10.3390/molecules24142663
Chicago/Turabian StyleNatour, Suzana, Anat Levi-Zada, and Raed Abu-Reziq. 2019. "Magnetic Polyurea Nano-Capsules Synthesized via Interfacial Polymerization in Inverse Nano-Emulsion" Molecules 24, no. 14: 2663. https://doi.org/10.3390/molecules24142663
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
