APPLICATION TO ACTUATORS WITH LOW ELECTRIC OPERATION USING ELECTRICSTRICTION OF FULLERENOL DOPED PUE

本研究的成果总结如下。与聚合物GET相似的聚氨酯弹性体(PUE)薄膜具有电致伸缩效应。提出了利用PUE薄膜的电致伸缩效应作为致动器等移动器件的应用方案。驱动器是由PUE薄膜和两种不同厚度的金属电极制成的单晶型驱动器。由于这些驱动器工作在1KV以上的高压下，我们通过在PUE中掺杂C&lt；60&gt；衍生物(富勒烯酚)来控制薄膜的结构，使驱动器可以在低电压下工作。富勒烯醇掺杂的PUE驱动器和未掺杂的PUE驱动器的弯曲沿电场的平方变化。此外，弯曲与电极厚度有关，当金属电极变薄到200 nm时，所有样品都向阴极方向弯曲，而与金属材料无关。它们表现出了极性效应。富勒烯醇作动器的弯曲比未掺杂的大，工作电压也较小。富勒烯醇作动器的作用力与电场成正比。很明显，这些驱动器的诱导力强烈地依赖于PUE膜的厚度。结果表明，富勒烯醇掺杂的PUE薄膜出现了压电性效应。

The results of this research are summarized as follows.1. The polyurethane elastomer (PUE) films similar to polymer gets have been found to show the electrostriction effect. We proposed the application to moving devices such as an actuator utilizing the electrostriction effect of PUE films.2. The actuators are monomorph type fabricated by PUE film and two kinds of metal electrodes of the different thickness. Since these actuators work at high voltage more than 1 KV, we controlled the structure of films by doping C_<60> derivatives (fullerenol) into PUE so that the actuators could operate under a low voltage.3. The bends of fullerenol doped PUE actuators and non-doped PUE actuators varied at the square of an electric field. Also, the bend depends on thickness of electrodes, when the metal electrode were thinning until 200 nm, all of samples were bent in the direction of cathode electrode independent of metal materials. They showed polarity effect.4. The bends of fullerenol doped actuators were larger than that of non-doped actuators and the working voltage was also small.5. The force of fullerenol doped actuators increased in proportion to an electric field. It was clear that the induced forces of these actuators strongly depend on the thickness of PUE films. It was cleared that the fullerenol doped PUE films appeared the piezoelectric effect.