NDLI: Carbonyl groups anchoring for the water dispersibility of magnetite nanoparticles

Content Provider	Springer Nature Link
Author	Tao, Ke Song, Sheng Ding, Jing Dou, Hongjing Sun, Kang
Copyright Year	2011
Abstract	Magnetite nanoparticles, which were synthesized by using diethylene glycol (DEG) as both solvent and reductant, displayed excellent hydrophilicity and water dispersibility. The influences of the amount of carboxymethyl-dextran sodium salt and NaOH on nanoparticles dispersibility were evaluated in terms of zeta potentials, concentration variation under centrifugal field, Fourier transform infrared, and X-ray photoelectron spectra, respectively. The results showed that the water dispersibility is not related to the amount of carboxymethyl-dextran, but depends on that of NaOH. Further evaluation revealed that DEG was partially oxidized with the assistance of NaOH, and thanks to the resultant carbonyl groups, the flexible oxidized DEG chains were anchored on the nanoparticles surface, which provides sufficient protection and high water-dispersibility of the as-prepared magnetite nanoparticles. Furthermore, we suggest that the binding between carbonyl groups and nanoparticles is related to the electron-withdrawing effect. The current study may provide more selectiveness of modifying molecules for magnetite nanoparticles.
Starting Page	361
Ending Page	369
Page Count	9
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	289
Issue Number	4
e-ISSN	14351536
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-02-02
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Diethylene glycol Carboxymethyl-dextran Carbonyl group Magnetite nanoparticle Water dispersibility Characterization and Evaluation of Materials Polymer Sciences Food Science Soft and Granular Matter, Complex Fluids and Microfluidics Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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