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Journal of Nanoparticle Research
Erschienen in: Journal of Nanoparticle Research 7/2012

01.07.2012 | Research Paper

Magnetite nanoparticle coated with amphiphilic bilayer surfactant of polysiloxane and poly(poly(ethylene glycol) methacrylate)

verfasst von: Bandit Thong-On, Boonjira Rutnakornpituk, Uthai Wichai, Metha Rutnakornpituk

Erschienen in: Journal of Nanoparticle Research | Ausgabe 7/2012

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Abstract

We are here reporting the surface modification of magnetite nanoparticle (MNP) with amphiphilic steric stabilizer of polydimethylsiloxane (PDMS) and poly(poly(ethylene glycol) methacrylate) (PPEGMA). The main purpose of this work is to obtain the polymeric bilayer surfactant of hydrophobic PDMS inner shell and hydrophilic PPEGMA brush corona on MNP core. Functionalized PDMS was first synthesized and then covalently grafted on the functionalized MNP surface. The PDMS-coated MNP served as a reactive macroinitiator for atom transfer radical polymerization (ATRP) of PPEGMA. Kinetics studies indicated the constant consumption of PEGMA during first 7 h of the ATRP. Transmission electron microscopy showed the average particle size of 7 nm in diameter. Fourier transform infrared spectrophotometry, thermogravimetric analysis, and vibrating sample magnetometry indicated the increase of the percentage of the copolymer in the complex when the ATRP was prolonged. The decrease in its hydrodynamic size from 446 to 162 nm when the ATRP was extended indicated the improvement in its dispersibility in water. In addition, it was found that percent entrapment efficiency and loading efficiency of indomethacin model drug in the PPEGMA-coated MNP was 62 and 27 %, respectively.
Vorheriger Artikel Investigation on microstructure and thermal properties of graphene-nanoplatelet/palmitic acid composites
Nächster Artikel Cellular and molecular responses of E. fetida cœlomocytes exposed to TiO2 nanoparticles

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Metadaten
Titel
Magnetite nanoparticle coated with amphiphilic bilayer surfactant of polysiloxane and poly(poly(ethylene glycol) methacrylate)
verfasst von
Bandit Thong-On
Boonjira Rutnakornpituk
Uthai Wichai
Metha Rutnakornpituk
Publikationsdatum
01.07.2012
Verlag
Springer Netherlands
Erschienen in
Journal of Nanoparticle Research / Ausgabe 7/2012
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-012-0953-y

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