Evaluation in concentration of surface amino groups upon doped and dedoped Fe3O4/PANI nanocomposites through conjugation with p-hydroxybenzaldehyde

Evaluation in concentration of surface amino groups upon doped and dedoped Fe3O4/PANI... An in situ chemical oxidation polymerization approach in combination with dedoping treatment was employed for preparing Fe3O4/polyaniline (Fe3O4/PANI) and dedoped Fe3O4/PANI nanocomposites. The two magnetic nanocomposites were featured with relatively high-saturation magnetization, superparamagnetism, and a multicore–shell structure. Both S and Cl species can be doped into PANI shell. The doping level of Fe3O4/PANI nanocomposite was estimated to be 30.9% through X-ray photoelectron spectroscopy. After dedoping treatment, about 95% S and 40% Cl can be removed from PANI shell. More significantly, a spectroscopic method has been developed for estimating the concentration of amino groups on surface of PANI-coated nanocomposites through nucleophilic addition between amino and p-hydroxybenzaldehyde. The concentration of surface amino groups was estimated to be ca. 357.1 and 554.5 μmol g−1, corresponding to the doped and dedoped magnetic nanocomposites, respectively. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Colloid Polymer Science Springer Journals

Evaluation in concentration of surface amino groups upon doped and dedoped Fe3O4/PANI nanocomposites through conjugation with p-hydroxybenzaldehyde

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany
Subject
Chemistry; Polymer Sciences; Soft and Granular Matter, Complex Fluids and Microfluidics; Characterization and Evaluation of Materials; Physical Chemistry; Food Science; Nanotechnology and Microengineering
ISSN
0303-402X
eISSN
1435-1536
D.O.I.
10.1007/s00396-017-4134-5
Publisher site
See Article on Publisher Site

Abstract

An in situ chemical oxidation polymerization approach in combination with dedoping treatment was employed for preparing Fe3O4/polyaniline (Fe3O4/PANI) and dedoped Fe3O4/PANI nanocomposites. The two magnetic nanocomposites were featured with relatively high-saturation magnetization, superparamagnetism, and a multicore–shell structure. Both S and Cl species can be doped into PANI shell. The doping level of Fe3O4/PANI nanocomposite was estimated to be 30.9% through X-ray photoelectron spectroscopy. After dedoping treatment, about 95% S and 40% Cl can be removed from PANI shell. More significantly, a spectroscopic method has been developed for estimating the concentration of amino groups on surface of PANI-coated nanocomposites through nucleophilic addition between amino and p-hydroxybenzaldehyde. The concentration of surface amino groups was estimated to be ca. 357.1 and 554.5 μmol g−1, corresponding to the doped and dedoped magnetic nanocomposites, respectively.

Journal

Colloid Polymer ScienceSpringer Journals

Published: Jun 24, 2017

References

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