Rheological properties of magnetorheological suspensions based on core–shell structured polyaniline-coated carbonyl iron particles

0347629 - ÚH 2011 RIV GB eng J - Článek v odborném periodiku
Sedlačík, M. - Pavlínek, V. - Sáha, P. - Švrčinová, Petra - Filip, Petr - Stejskal, Jaroslav
Rheological properties of magnetorheological suspensions based on core–shell structured polyaniline-coated carbonyl iron particles.
Smart Materials and Structures. Roč. 19, č. 11 (2010), s. 115008. ISSN 0964-1726. E-ISSN 1361-665X
Grant CEP: GA ČR GA202/09/1626
Výzkumný záměr: CEZ:AV0Z20600510; CEZ:AV0Z40500505
Klíčová slova: magnetorheology * core-shell structure * polyaniline
Kód oboru RIV: BK - Mechanika tekutin
Impakt faktor: 2.094, rok: 2010

The sedimentation caused by the high density of suspended particles used in magnetorheological fluids is a significant obstacle for their wider application. In the present paper, core–shell structured carbonyl iron–polyaniline particles in silicone oil were used as a magnetorheological suspension with enhanced dispersion stability. Bare carbonyl iron particles were suspended in silicone oil to create model magnetorheological suspensions of different loading. For a magnetorheological suspension of polyaniline-coated particles the results show a decrease in the base viscosity. Moreover, the polyaniline coating has a negligible influence on the MR properties under an external magnetic field B. The change in the viscoelastic properties of magnetorheological suspensions in the small-strain oscillatory shear flow as a function of the strain amplitude, the frequency and the magnetic flux density was also investigated.
Trvalý link: http://hdl.handle.net/11104/0188370