Abstract
The effect of the molecular weight of poly(ethylene glycol) (PEG) on the physical properties of water-based magnetic fluids with sodium oleate and PEG stabilization was investigated. The structure as well as magnetic, rheological, and thermal properties of the obtained samples were studied using transmission electron microscopy (TEM), photon cross correlation spectroscopy (PCCS), superconducting quantum interference device (SQUID), and differential scanning calorimetry (DSC) methods. The molecular weight of PEG had a strong effect on the rheological properties while the effect was rather insignificant on the particle size distribution and the self-heating of the studied magnetic fluids. The heating ability of the PEG-stabilized magnetic fluids was determined by calorimetric measurements of the specific absorption rate (SAR). The thickness of the PEG layer was calculated from the experimental data of the temperature rise rates as a function of the magnetic field strength using the Rosensweig theory.
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Acknowledgments
Work was supported by the Project for Polish–Slovak Bilateral Cooperation No. APVV SK-PL-0069-09/8158/2010. The studies were supported by the Slovak Academy of Sciences VEGA 2/0051/09, Centre of Excellence SAS Nanofluids, Project No. 26220220005 in frame of Structural Funds.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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Józefczak, A., Hornowski, T., Skumiel, A. et al. Effect of the Molecular Weight of Poly(ethylene glycol) on the Properties of Biocompatible Magnetic Fluids. Int J Thermophys 33, 640–652 (2012). https://doi.org/10.1007/s10765-011-1061-4
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DOI: https://doi.org/10.1007/s10765-011-1061-4