Effect of electric field on storage modulus of dielectric composites |
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| Authors: | Ning Ma Guangping Gong Nannan Li Bo Li Xufeng Dong |
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| Affiliation: | 1. School of Civil Engineering, Dalian University of Technology, Dalian, China;2. Department of Engineering Mechanics, Dalian University of Technology, Dalian, China;3. Liaoning Key Laboratory of Energy Materials and Devices, School of Materials Science and Engineering, Dalian University of Technology, Dalian, China;4. State Key Laboratory for Manufacturing System Engineering and Shaanxi Key Laboratory for Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, China |
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| Abstract: | DCs composed by dielectric particles and elastomer matrix present electric field dependent deformation. Viscoelasticity dominates their electric field response, which has to be considered in their applications. Although the influence of strain amplitude and oscillation frequency on the viscoelasticity of DCs has been investigated, the effect of electric field has been seldom studied. In this study, DCs were prepared by dispersing TiO2 particles with different concentrations and different distributions within silicone rubbers. The areal strain and the storage modulus of the DCs under different electric fields were tested. The results indicated the electric field has significant influence on the storage modulus of the DCs. Such an electric field dependent storage modulus is more significant for the DCs with higher particle fraction, or with aligned distributed particles. The enhanced electrostatic interaction between the adjacent particles by applying electric field is responsible for the phenomena. |
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| Keywords: | composites rheology sensors and actuators viscosity and viscoelasticity |
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