将SMP与PVDF单压电晶片集成以增强弯曲性能。

Integration of SMP with PVDF Unimorph for Bending Enhancement.

作者信息

Kalel Sudarshan, Wang Wei-Chih

机构信息

Institute of Nanoengineering and Microsystems, National Tsinghua University, Hsinchu City 300, Taiwan.

Department of Power Mechanical Engineering, National Tsinghua University, Hsinchu City 300, Taiwan.

出版信息

Polymers (Basel). 2021 Jan 28;13(3):415. doi: 10.3390/polym13030415.

DOI:10.3390/polym13030415

PMID:33525465

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7865686/

Abstract

Heat generation in active/passive layer-based piezoelectric actuators is unavoidable due to the mechanical, dielectric, and resistive losses in the material. In this work, a polyvinylidene fluoride (PVDF)-based unimorph cantilever actuator is developed with simulation and experimental studies on the effect of DC high voltages on heat production in the PVDF layer. A layer of one-way shape memory polymers (1W-SMPs) is integrated in the actuator to exploit the heat produced to increase the bending angle. The length and mounting location of the SMP layer impacts the bending of the actuator; by using an SMP layer with a length equal to half of the PVDF layer at the center of the unimorph actuator, the absolute bending angle is increased to 40° compared to the base piezo bending angle of 4° at 20 V/µm.

摘要

由于材料中的机械、介电和电阻损耗，基于主动/被动层的压电致动器中产生热量是不可避免的。在这项工作中，开发了一种基于聚偏二氟乙烯（PVDF）的单压电片悬臂致动器，并对直流高压对PVDF层中产热的影响进行了模拟和实验研究。在致动器中集成了一层单向形状记忆聚合物（1W-SMPs），以利用产生的热量来增加弯曲角度。SMP层的长度和安装位置会影响致动器的弯曲；通过在单压电片致动器中心使用长度等于PVDF层一半的SMP层，在20 V/µm的电压下，绝对弯曲角度从基础压电弯曲角度4°增加到了40°。