Properties of Iron Oxide Nanoparticles
H. T. Ong, M. J. Nurhidayatullaili, B. A. H. Sharifah, O. Boondamnoen and M. F. Tai

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Due to hygienic concerns in gloves are required to be worn in food, pharmaceutical processing and healthcare industries. In fact, these gloves might tear off and contaminate the food and pharmaceutical or healthcare products during the manufacturing and packaging process. The white or light flesh-coloured gloves are not easy to detect by naked eyes, subsequently they lead to difficulty in removal before shipping. In this paper, iron oxide nanoparticles were selected as additive for nitrile butadiene rubber in order to improve the detectability of gloves by mean of its magnetic properties. Iron oxide nanoparticles (IONs) were synthesized via precipitation method with monosalt iron (II) sulphate heptahydrate and ammonium hydroxide as precursors at 60°C. The properties of IONs were investigated by zetasizer, X-ray diffractometry (XRD), transmission electron microscopy (TEM), Raman spectroscopy and vibrating sample magnetometer. Based on zetasizer analysis, iron oxides were found in average hydrodynamic size 87.8 nm. By using Scherrer equation, XRD showed an average of 25.95 nm crystallite size. Semispherical shape with 15.4 nm of IONs were observed by TEM. Magnetite and maghemite phase were found in the range of 670 cm–1 and 700 cm–1 respectively, through Raman spectroscopy. Finally, IONs with 70.1 emu/g of magnetization saturation were able to form acrylonitrile butadiene rubber/IONs composite with 3.8 emu/g magnetization saturation.

Key words:Iron oxide nanoparticles; precipitation; magnetic properties; magnetization; maghemite; hematite; NBR latex film

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