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PIEZOELECTRIC EFFECT OF PUE FILMS CONTROLLED BY CARBON NANOTUBES (CNTs) AND ITS ACTUATION MECHANISM

碳纳米管控制PUE薄膜的压电效应及其驱动机制

基本信息

批准号：
15360177
负责人：
KYOKANE Jun
金额：
$ 3.78万
依托单位：
NARA NATIONAL COLLEGE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360177/
关键词：
polyurethane elastomer films electrostriction effect actuators monomorph type carbon nanotube (CNT) and its derivatives control of morphology space charge measurement piezoelectric effect PUEアクチュエータ空間電化測定分子構造性御ユニモルフ型アクチュエータ空間電荷

项目摘要

The results of this research are summarized as follows.1.We proposed their application to moving devices such as an actuator without ionic solvents using the electrostriction effect of polyurethane elastomer (PUE) films.2.The actuators are of monomorph type fabricated by PUE film and metal electrodes evaporated at same thickness (200nm) on the both film surfaces.3.Since these actuators work at high voltages more than 1 KV, we controlled the molecular structure of the film by doping carbon nanotubes (CNTs) derivative into PUE so that the actuators could operate under a lower voltage.4.The bending displacement of the CNTs-doped PUE actuator varied with the square of the electric field. All samples of PUE actuator bent in the direction of the cathode electrode independent of the metal materials. They exhibited a polarity effect.5.The bends of these actuators were larger than normal actuators by doping CNTs and its operating voltage took place at 300 V. Moreover, the bending displacement strongly depends on the number of hydroxyl groups of CNTs.6.The induced forces of the CNTs-doped actuator increased in proportion to applied voltage, and significantly depended on film thickness. The actuator with a film thickness of 200 μm had the strongest force and could lift up to a load of 700 mg.7.In order to clear the bending mechanism of actuators, we measured the space charges of the various kinds of PUE films (normal, fullerenol and CNTs-doped films) by using the pulsed electro-acoustic method.8.We have found that molecule chains are attracted each other by electric force due to the positive and negative charges at cathode electrode from measurement of space charge based on the polar groups of molecular chain. As a result, it was concluded that the all PUE film actuators always bend in the direction of cathode electrode.9.These PUE films also appeared the piezoelectric effect.

本研究的结果总结如下：1.我们利用聚氨酯弹性体（PUE）薄膜的电致伸缩效应，提出了将它们应用于移动装置，例如无离子溶剂的执行器。2.该执行器是由PUE薄膜和在两个薄膜表面上蒸发相同厚度（200nm）的金属电极制成的单晶型。3.由于这些执行器在超过1的高电压下工作。 KV，我们通过在PUE中掺杂碳纳米管（CNTs）衍生物来控制薄膜的分子结构，使驱动器能够在较低的电压下工作。4.CNTs掺杂的PUE驱动器的弯曲位移随电场的平方变化。 PUE执行器的所有样品均在阴极方向弯曲，与金属材料无关。它们表现出极性效应。5.这些驱动器的弯曲比普通掺杂CNT的驱动器大，其工作电压为300 V。此外，弯曲位移强烈依赖于CNT的羟基数量。6.掺杂CNT的驱动器的感应力与施加的电压成正比增加，并且显着依赖于薄膜厚度。薄膜厚度为200μm的致动器力最强，可举起700mg的负载。7.为了明确致动器的弯曲机制，我们利用脉冲电声方法测量了各种PUE薄膜（普通薄膜、富勒烯醇薄膜和CNTs掺杂薄膜）的空间电荷。8.我们发现分子链由于电场力的作用而相互吸引。根据分子链极性基团测量空间电荷，测量阴极的正电荷和负电荷。结果表明，所有PUE薄膜致动器总是向阴极方向弯曲。9.这些PUE薄膜还出现了压电效应。