NDLI: Formation of polyoxazoline-silica nanoparticles via the surface-initiated cationic polymerization of 2-methyl-2-oxazoline

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Formation of polyoxazoline-silica nanoparticles via the surface-initiated cationic polymerization of 2-methyl-2-oxazoline

Content Provider	Semantic Scholar
Author	Bissadi, Golnaz Weberskirch, Ralf
Copyright Year	2016
Abstract	Well-defined polyoxazoline-silica hybrid nanoparticles were prepared by coating silica nanoparticles (SNPs) with poly(2-methyl-2-oxazoline) using a surface-initiated cationic ring-opening polymerization process. First, reverse microemulsion was used to synthesize monodisperse SNPs followed by immobilizing (chloromethyl)phenylethyl)trimethoxysilane on the surface of the nanoparticles acting as an initiator. The grafting density of the polymeric shell was controlled by varying the polymerization time, PSNPs-A, and the monomer/initiator ratio concentration, PSNPs-B. Hybrid nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and transmission electron microscopy (TEM). The molecular weight and polydispersity indices of the polymer chains were determined by size exclusion chromatography (SEC) after etching the silica core. The hybrid nanoparticles were further functionalized with fluorescein isothiocyanate (FITC) and folic acid (FA) as a fluorescence imaging molecule and a cancer-targeting ligand, respectively. Moreover, hybrid nanoparticles with Rubpy as a fluorophore encapsulated in the silica core and the poly(2-methyl-2-oxazoline) shell were prepared.
Starting Page	5157
Ending Page	5168
Page Count	12
File Format	PDF HTM / HTML
DOI	10.1039/C6PY01034B
Alternate Webpage(s)	http://www.rsc.org/suppdata/c6/py/c6py01034b/c6py01034b1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C6PY01034B
Volume Number	7
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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