3 years ago

Thermoplastic Dielectric Elastomer of Triblock Copolymer with High Electromechanical Performance

Thermoplastic Dielectric Elastomer of Triblock Copolymer with High Electromechanical Performance
Xuxu Yang, Yuhan Xie, Tiefeng Li, Jie Mao, Yingwu Luo, Zipeng Ma
Dielectric elastomer (DE) actuators have been shown to have promising applications as soft electromechanical transducers in many emerging technologies. The DE actuators, which are capable of large actuation strain over a wide range of excitation frequencies, are highly desirable. Here, the first single-component DE of a triblock copolymer with attractive electromechanical performance is reported. Symmetric poly(styrene-b-butyl acrylate-b-styrene) (SBAS) is designed and synthesized. The SBAS actuator exhibits about 100% static actuation area strain and excellent dynamic performance, as evidenced by a wide half bandwidth of 300 Hz and a very high specific power of 1.2 W g–1 within the excitation frequency range of 300–800 Hz. Well-designed polystyrene-poly(n-butyl acrylate)-polystyrene triblock copolymer (SBAS) shows attractive electromechanical performance. Driven by an external electric field, the SBAS actuator shows about 100% static actuation area strain and excellent dynamic performance with a wide half bandwidth of 300 Hz and very high specific power of 1.2 W g–1 within the excitation frequency range 300–800 Hz.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/marc.201700268

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