Fabrication of p-aminobenzoic acid grafted carbonyl iron/polyindole composite particles and their magnetorheological response

초록

To improve the dispersion stability of magnetic microspheres, polyindole (Pln) was adopted as a shell material to encapsulate micro-spherical carbonyl iron (CI) core particles using 4-aminobenzoic acid as a grafting agent. The coated morphology of the CI/PIn particles was observed by scanning electron microscopy and the coating was confirmed by Fourier transform infrared spectroscopy. The magneto-rheological (MR) properties were examined using a rotational rheometer equipped with a plate-to-plate geometry and different magnetic field strengths. The improved dispersion stability of the Cl/Pln particle based MR fluid was confirmed using a Turbiscan. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

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