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6 April 2009 Effect of organo-clay on actuation response of silicone rubber actuators
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Dielectric elastomers are light weight, low-cost, and highly deformable smart materials widely in used as sensors and actuators. Compounding of silicone rubber with various fillers can enhance efficiency of smart materials. Effect of organically modified Montmorillonite (OMMT) nanoclay on improvement of dielectric properties and actuation stress was considered in this study. Room Temperature Vulcanized (RTV) silicone rubber was compound with 2% and 5% of OMMT by solution method and a composite film was cast. Dielectric measurements show enhancement of both dielectric permittivity and dielectric loss in these composites. Actuation stress for different composites was measured by using an in-house actuation set-up, which showed that actuation stress for a given electric field intensity is higher for composites than that for pristine silicone rubber. Furthermore, time dependent actuation response of the samples was evaluated. Dielectric properties of the composites were measured under AC electric fields, and results were compared with the reference silicone rubbers with no filler. Results shows increase in both storage and loss dielectric constants of base silicone rubber when it is compounded with OMMT.
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N. Gharavi, M. Razzaghi Kashani, and A. Moradi "Effect of organo-clay on actuation response of silicone rubber actuators", Proc. SPIE 7287, Electroactive Polymer Actuators and Devices (EAPAD) 2009, 72871W (6 April 2009);

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