Kim, YD Klingenberg, DJ 2024-01-21T19:07:11Z 2024-01-21T19:07:11Z 2021-09-01 1997-01 0256-1115 https://pubs.kist.re.kr/handle/201004/144193 The nonlinear electrorheological (ER) behavior of nonionic surfactant-activated ER suspensions is investigated. The influence of three nonionic surfactants (Brij(R)30, GMO, and GTO) on the electrorheological (ER) response of various alumina/silicone oil suspensions shows similar behavior. The prevalent feature common to all formulations is that the yield stress, tau(0), initially increases with surfactant concentration, passes through a maximum, then decreases with surfactant concentration. The nonlinear behavior observed at large surfactant concentrations (i.e., tau(0) approximate to E-n, where n<2) arises from field-induced phase separation of a surfactant-rich phase as opposed to field-dependent conductivity of a homogeneous continuous phase. English KOREAN INST CHEM ENGINEERS RHEOLOGY FORCES FLUIDS The nonlinear behavior of surfactant-activated electrorheological suspensions Article 10.1007/BF02706037 1 KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.14, no.1, pp.23 - 29 KOREAN JOURNAL OF CHEMICAL ENGINEERING 14 1 23 29 scie scopus A1997XF06300004 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article RHEOLOGY FORCES FLUIDS electrorheology surfactants colloid