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The Scientific World Journal
Volume 2014, Article ID 706367, 7 pages
Research Article

Effect of Micro- and Nanomagnetite on Printing Toner Properties

1Department of Printing Science and Technology, Institute for Color Science and Technology, P.O. Box 16765-654, 1668814811 Tehran, Iran
2Department of Inorganic Pigment and Glazes, Institute for Color Science and Technology, 1668814811 Tehran, Iran
3Department of Chemistry, Islamic Azad University, East Tehran Campus, Tehran, Iran

Received 29 August 2013; Accepted 27 October 2013; Published 19 January 2014

Academic Editors: F. Cleymand, P. Reis, and M. Young

Copyright © 2014 Maryam Ataeefard et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Toner is a main component of electrophotographic printing and copying processes. One of the most important ingredients of toner is magnetite (Fe3O4) which provides the tribocharging property for toner particles. In this study, nano- and microparticles of Fe3O4 were synthesized using the coprecipitation method and different amounts of lauric acid as a surfactant. The synthesized nano and micro Fe3O4 was then used as the charge control agent to produce toner by emulsion aggregation. The Fe3O4 and toner were characterized by X-ray powder diffraction (XRD), atomic gradient force magnetometry (AGFM), dynamic laser scattering (DLS), particle size analysis, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). The results show that the optimum amount of surfactant not only reduced particle size but also reduced the magnetite properties of Fe3O4. It was found that the magnetite behavior of the toner is not similar to the Fe3O4 used to produce it. Although small-sized Fe3O4 created toner with a smaller size, toners made with micro Fe3O4 showed better magnetite properties than toner made with nano Fe3O4.