Electrorheological behavior of iron(ii) oxalate micro-rods

Abstract

The application of rod-like iron(ii) oxalates particles led to significant electrorheological effect as proved e.g. via the creep-recovery experiments under the application of an external electric field.

1D and 2D hybrid polymers based on zinc phenylphosphates: synthesis, characterization and applications in electroactive materials

“…For example, smart uids responding to electric elds (EFs), are formed by electricallypolarizable particles dispersed in a non-conducting liquid medium, [40][41][42][43] and may be utilized in dampers, valves, engine mounts, hydraulic actuators, squeeze mounts, medicine (e.g., in drug delivery or haptic medical devices), and food processing. [44][45][46][47] The industrial applications of currently known electrorheological (ER) uids are based on a positive ER effect, 44,47,48 resulting from the EF-controlled orientation of dispersed particles (e.g., metal oxides, 41,42 metal salts, 43 and modied polymeric particles 40 ) into chain-like structures accompanied by a transition of uid from liquid to viscoelastic system. However, there are many applications in which a controllable decrease in viscosity would be desirable (e.g., hydrostatic journal bearing for controlling rotor vibrations or squeeze lm damper for actively controlling rotor dynamics).…”

“… 44–47 The industrial applications of currently known electrorheological (ER) fluids are based on a positive ER effect, 44,47,48 resulting from the EF-controlled orientation of dispersed particles ( e.g. , metal oxides, 41,42 metal salts, 43 and modified polymeric particles 40 ) into chain-like structures accompanied by a transition of fluid from liquid to viscoelastic system. However, there are many applications in which a controllable decrease in viscosity would be desirable ( e.g.…”

Electroresponsive Performances of Ecoresorbable Smart Fluids Consisting of Various Plant‐Derived Carrier Liquids

“…Thus, the sedimentation tests of the Mg‐doped ST HNP‐based ER fluids consisting of four different vegetable oils (30 vol %) were evaluated by measuring the sedimentation ratio (Figure 6). The sedimentation ratio has been commonly used to determine the dispersion stability in ER studies, which was defined in previous articles as the height of the particle sediment divided by the height of the entire fluid [57–64] . The particles in the ER fluid are so different in density from the carrier liquid that the particles subside by gravity over time and are therefore separated into layers of oil and particles.…”

Dynamic Response of Polyindole Coated Zinc Ferrite Particle Suspension under an Electric Field

“…In contrast, under the E , the stress relaxation of the ER fluid is not observed, and a plateau region is maintained at a stable value of G(t). This is the result of solid-like properties manifested by the strong chain formation of the ZnFe 2 O 4 /Pin-based ER fluid under the E [ 39 , 40 ].…”