Issue 8, 2015
From the journal:

Journal of Materials Chemistry C

Polyaniline/Fe composite nanofiber added softmagnetic carbonyl iron microsphere suspension and its magnetorheology

Shang Hao Piao,a   Madhumita Bhaumik,b   Arjun Maitycde  and  Hyoung Jin Choi*a  

* Corresponding authors

a Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea
E-mail: hjchoi@inha.ac.kr

b Department of Chemistry, Tshwane University of Technology, Private Bag X680, Pretoria, South Africa

c DST/CSIR Innovation Centre, National Centre for Nanostructured Materials, Materials Science and Manufacturing, Council for Scientific and Industrial Research, Pretoria 0001, South Africa

d Department of Civil and Chemical Engineering, University of South Africa (UNISA), South Africa

e Department of Applied Chemistry, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa

Abstract

Fe0 nanoparticle-supported polyaniline (PANI) composite nanofibers were prepared as an additive for carbonyl iron (CI)-based magnetorheological (MR) fluids to improve the MR properties and dispersion stability. A simple chemical strategy was adopted to synthesize the PANI/Fe0 composite nanofibers. The synthesis method was based on the initial fabrication of interconnected PANI nanofibers by a rapidly mixed polymerization process using ferric chloride (FeCl3) as the oxidant and the subsequent reductive support of Fe0 nanoparticles onto the PANI nanofiber matrix using the polymerization by-products as a metal precursor. X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy showed that the fabricated nanofibers were composed of PANI and Fe0. Scanning and transmission electron microscopy imaging confirmed that the PANI/Fe0 composite nanofibers were 80–150 nm in diameter with an interconnected matrix. The MR fluid with the PANI/Fe0 composite nanofibers dispersed in mineral oil under an external magnetic field showed enhanced MR properties compared to that without an additive. Turbiscan data also confirmed the improved sedimentation properties of the MR fluid with an additive.

Graphical abstract: Polyaniline/Fe composite nanofiber added softmagnetic carbonyl iron microsphere suspension and its magnetorheology

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Article information

DOI
https://doi.org/10.1039/C4TC02491E
Article type
Paper
Submitted
02 Nov 2014
Accepted
12 Dec 2014
First published
17 Dec 2014

J. Mater. Chem. C, 2015,3, 1861-1868

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Polyaniline/Fe composite nanofiber added softmagnetic carbonyl iron microsphere suspension and its magnetorheology

S. H. Piao, M. Bhaumik, A. Maity and H. J. Choi, J. Mater. Chem. C, 2015, 3, 1861 DOI: 10.1039/C4TC02491E

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