Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 403, Issue -, Pages 133-138Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2012.04.002
Keywords
Magnetorheological fluid; Carbonyl iron; Core-shell; Silica; Encapsulation
Categories
Funding
- Ministry of Knowledge Economy, Korea
- Korea Evaluation Institute of Industrial Technology (KEIT) [10040031] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Silica encapsulated core-shell structured carbonyl iron (Cl) magnetic particles (Cl@SiO2) were successfully prepared via a facile sol-gel method based on the silane grafted Cl particles in two steps, and then confirmed by scanning electron microscopy and X-ray energy dispersive spectra. Anti-corrosion property of the as-fabricated Cl@SiO2 particles was examined under conditions of being both heated in the air environment and sustained in an acid solution. Magnetorheological (MR) performance of the Cl@SiO2 based MR fluid dispersed in silicone oil, including complex viscosity, storage and loss modulus as well as the related loss factor and relaxation modulus, was investigated and compared with that of the Cl based MR fluid by using a rotational rheometer equipped with a magnetic device, showing enhanced property of heat-induced oxidation resistance with decreased particle density. (C) 2012 Elsevier B.V. All rights reserved.
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