Mechanical, Dielectric, and Actuated Strain of Silicone Elastomer Filled with Various Types of TiO₂

Mechanics of dielectric elastomers: materials, structures, and devices

“…A continuous effort from the materials community is to achieve better DEs with increasing dielectric constant. One preferred strategy is to places elected particles that carry high permittivity into the elastomers (Galantini et al, 2013;Liu H. et al, 2013;Tian et al, 2014). Different from the traditional DEs, the effective electromechanical coupling in these particle/matrix composites becomes highly nonlinear, making it a challenging task to properly model such materials from theoretical point of view (Li B. et al, 2013).…”

The fabrication of dielectric elastomers from silicone rubber and barium titanate: employing equi-biaxial pre-stretch to achieve large deformations

“…(2) that a material of high dielectric constant combined with a low elastic modulus can achieve a large strain when subjected to a low electric field [14,17]. Therefore, particles such as titanium dioxide TiO 2 [18,17], copper-phthalocyanine oligomer (CPO) [19] and BT [20] that all possess high dielectric constants are widely used as fillers, to enhance the dielectric constants of DE materials. This allowed actuated area strains of 15 % -35 % to be achieved.…”

Silicone rubbers for dielectric elastomers with improved dielectric and mechanical properties as a result of substituting silica with titanium dioxide

“…[39] Active particles interact with the polymer matrix through the adsorption of polymer molecules on their surface (immobilization) and with each other. However, the deterioration of the mechanical strength of composites by fillers was also observed, which is mainly due to agglomerates.…”