Evaluation for the actuation performance of dielectric elastomer actuator using polyisoprene elastomer with dynamic ionic crosslinks
Evaluation for the actuation performance of dielectric elastomer actuator using polyisoprene elastomer with dynamic ionic crosslinks
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DOI：
10.1016/j.sna.2021.113143
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
K. Naito;Yohei Miwa;Ryoma Ando;K. Yashiro;S. Kutsumizu
中科院分区：
文献类型：
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作者：
K. Naito;Yohei Miwa;Ryoma Ando;K. Yashiro;S. Kutsumizu
研究了自修复动态离子交联（DIC）弹性体的介电性能及其作为介电弹性体致动器（DEA）的性能。DIC弹性体的相对介电常数约为3.0，在20- 200，000 Hz的频率范围内以及在20 Hz下低于2.70 V/μm的场强下，其几乎恒定。预期的大规模离子极化的离子聚集体下的电场检查没有观察到。使用DIC弹性体的DEA（DIC-DEA）的最大粘连应力比使用市售胶带（VHB 4910）的DEA（VHB-DEA）的最大粘连应力大得多（约22.6倍）。这是由于DIC-DEA的击穿强度远高于VHB-DEA的优点。DIC的杨氏模量表现出一种特殊的行为，电场（3.00 V/μm）下的杨氏模量比无电场（0.39 ± 0.07 MPa）下的杨氏模量高1.4倍。1.0 kV/s和0.2 kV/s时的最大阻塞应力相同。这将反映这样的事实，即阻塞应力与作为变形速率的函数的杨氏模量无关。此外，室温下，自愈合的DIC弹性体在5.80 V/μm处发生了重新连接，无论电压变化率如何，自愈合的DIC-DEA与未切割的DIC-DEA的粘连应力相同。这些结果表明，DIC-DEA是一种可持续的DEA，表现出没有恶化的性能，因为它的自我修复行为，即使在机械损伤。
The dielectric properties of self-healing dynamic ion crosslink (DIC) elastomer and its performance as a dielectric elastomer actuator (DEA) were evaluated. The relative permittivity of the DIC elastomer was approximately 3.0 and it was almost constant in the frequency range of 20–200,000 Hz and in the field strength below 2.70 V/μm at 20 Hz. The expected large-scale ionic polarization of the ionic aggregates was not observed under the electric field examined. The maximum blocking stress of the DEA using the DIC elastomer (DIC-DEA) was much larger (approximately 22.6 times) than that of the DEA using a commercial tape (VHB4910) (VHB-DEA). This is brought by the advantage that the breakdown strength of DIC-DEA is much higher than that of VHB-DEA. The Young’s modulus of DIC showed a peculiar behavior; it was higher (1.4 times) under an electric field (3.00 V/μm) than in the absence of an electric field (0.39 ± 0.07 MPa). The maximum blocking stress at 1.0 kV/s was the same as that at 0.2 kV/s. This would reflect the fact that the blocking stress is independent of the Young’s modulus as a function of the deformation rate. In addition, cut DIC elastomer reconnected at room temperature, and the blocking stresses at 5.80 V/μm of the self-healed DIC-DEA was the same as that of the prior-to-cut DIC-DEA, regardless of the rate of change of voltage. These results suggest that DIC-DEA is a sustainable DEA that exhibits no deterioration of the performance because of its self-healing behavior even after the mechanical damage.