Large electromechanical effect of isotropic-genesis polydomain nematic elastomers
Large electromechanical effect of isotropic-genesis polydomain nematic elastomers
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DOI：
10.1039/c1sm06372c
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发表时间：
2011-01-01
期刊：
影响因子：
3.4
通讯作者：
Takigawa, Toshikazu
中科院分区：
文献类型：
--
作者：
Okamoto, Tetsuya;Urayama, Kenji;Takigawa, Toshikazu
我们证明了各向同性成因的多畴双相弹性体（I-PNE）在25 MV m（-1）的标称电场强度下表现出高达35%的大应变以及多畴到单畴的转变。I-PNE没有铁电性，观察到的最大电应变大于铁电手性近晶弹性体的报道值。I-PNE是通过在高温各向同性状态下交联液晶基元，然后通过将弹性体冷却至处于热塑性状态的温度而获得的。显着的电场响应性源于关于各向同性成因多畴特定的指向矢旋转的柔软性。
We demonstrate that an isotropic-genesis polydomain nematic elastomer (I-PNE) exhibits a large strain reaching 35% as well as a polydomain-to-monodomain transition at a nominal electric-field strength of 25 MV m(-1). The I-PNE has no ferroelectricity, and the maximum electrical strain observed is larger than the reported values for the ferroelectric chiral smectic elastomers. The I-PNE was obtained by cross-linking the mesogens in the high-temperature isotropic state and then by cooling the elastomer to the temperatures in the nematic state. The pronounced E-field responsivity originates from the softness regarding the director rotation specific to the isotropic-genesis polydomains.