Improving the drug delivery characteristics of graphene oxide based polymer nanocomposites through the "one pot" synthetic approach of single electron transfer living radical polymerization
Abstract Graphene oxide (GO) based polymer nanocomposites have attracted extensive research interest recently for their outstanding physicochemical properties and potential applications. However, surface modification of GO with synthetic polymers has demonstrated to be trouble for most polymerization procedures are occurred under non aqueous solution, which will in turn lead to the restacking of GO. In this work, a facile and efficient "one pot" strategy has been developed for surface modification of GO with synthetic polymers through single electron transfer living radical polymerization (SET LRP) The GO based polymer nanocomposites were obtained via SET LRP in aqueous solution using poly(ethylene glycol) methyl ether methacrylate (PEGMA) as the monomer and 11 bromoundecanoic acid as the initiator, which could be effectively adsorbed on GO through hydrophobic interaction. The successful preparation of GO based polymer nanocomposites was confirmed by a series of characterization techniques such as 1H nuclear magnetic resonance, Fourier transform infrared spectroscopy, thermogravimetric analysis, transmission electron microscopy and X ray photoelectron spectroscopy. The resultant products exhibit high water disperisibility, excellent biocompatibility and high efficient drug loading capability, making these PEGylated GO nanocomposites promising candidates for biomedical applications.