期刊
SMART MATERIALS AND STRUCTURES
卷 25, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/25/1/015023
关键词
magnetorheology; polyalphaolefin; magnetic suspensions; octanol; depletion; interaction potential; redispersion
资金
- Junta de Andalucia (Spain) [P10-RNM-6630, P11-FQM-7074]
- Ministerio de Educacion: Becas del Programa de Formacion del Profesorado Universitario (FPU) [FPU14/01576]
- FAPEMIG [RDP-00164-10, ETC-00044-13, PEE-00462-14, ETC-00043-15]
- [MAT 2013-44429-R]
- [PCIN-2015-051]
This work reports an investigation into the effect of 1-octanol concentration in the formulation of concentrated polyalphaolefin-based magnetorheological fluids. Special emphasis is paid to the understanding of their kinetic stability and redispersibility characteristics in the 'off-state' (absence of magnetic field). Techniques employed involve light scattering, electroacoustics and rheometry, using a vane tool, to precisely determine the yield value. The results obtained show a minimum in the rheological material functions for 1-octanol concentrations within the range 0.5-5.0 wt%. This finding is tentatively explained in terms of the potential energy of interaction between the dispersed particles as a result of the formation of 1-octanol micelles in good agreement with Bombard and Dukhin (2014 Langmuir 30 4517-21).
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