Hybrid Actuation in Coupled Ionic / Conducting Polymer Devices

2003 ◽  
Vol 785 ◽  
Author(s):  
Matthew D. Bennett ◽  
Donald J. Leo
Keyword(s):  
Conducting Polymer ◽  
Smart Materials ◽  
Electromechanical Coupling ◽  
Performance Metrics ◽  
Polymer Membrane ◽  
Low Frequencies ◽  
Ionic Polymer ◽  
Polymer Actuators ◽  
Ionic Conducting ◽  
Initial Results

ABSTRACTIonic polymer membrane actuators represent a relatively new and exciting entry into the field of smart materials. Several key limitations of these transducers have prevented them from experiencing widespread use, however. For example, the bandwidth of these devices is limited at very low frequencies by characteristic relaxation and at high frequencies by the low elastic modulus of the polymer. In this paper, an overview of the initial results of work with hybrid ionic / conducting polymer actuators is presented. These hybrid actuators are devices that combine the electromechanical coupling of ionic polymer actuators and conducting polymer actuators into one coupled device. Initial results show that these hybrid devices have the potential to offer marked advantages over traditional ionic polymer membrane transducers, including increased stress and strain generation and higher actuation bandwidth. Details of the preparation of these devices and performance metrics are presented and comparisons to baseline materials are made.

Chemomechanical Transduction in Hybrid Bio-Derived Conducting Polymer Actuator

2010 ◽  
Author(s):  
Vishnu Baba Sundaresan ◽  
Hao Zhang
Keyword(s):  
Ion Transport ◽  
Conducting Polymer ◽  
Smart Materials ◽  
Electromechanical Coupling ◽  
Biological Membrane ◽  
Barrier Membrane ◽  
Bending Actuator ◽  
Recent Developments ◽  
Polymer Actuator ◽  
Engineered Systems

Biological ion transport has inspired recent developments in smart materials. The work by Leo and co-workers, Bailey and co-workers has demonstrated the feasibility to design engineered systems using biological ion transporters. The biological and bio-inspired systems utilize ion transport across a barrier membrane for energy conversion. Among smart materials, ionic-active materials demonstrate electromechanical coupling using ion transport across the thickness of the polymer. Inspired by the resemblance between ionic interaction in a conducting polymer and biological membranes, this paper presents a novel actuation mechanism that uses ion transport through a biological membrane to produce shape changes in a conducting polymer actuator. This paper presents the basic architecture, the physics of transduction and analysis of extensional and bending actuation in the hybrid bio-polymer actuator. An extensional actuator of size 1 cm × 1 cm × 1 μm is theoretically found to generate 135 mPa of blocked stress. A bimorph bending actuator of dimensions 10 mm × 1 mm × 2 μm is theoretically found to produce a free-displacement of 0.5 mm using biochemical gradients.

scholarly journals Swimming like algae: biomimetic soft artificial cilia

2013 ◽  
Vol 10 (78) ◽  
pp. 20120666 ◽  
Author(s):  
Sina Sareh ◽  
Jonathan Rossiter ◽  
Andrew Conn ◽  
Knut Drescher ◽  
Raymond E. Goldstein
Keyword(s):  
Smart Materials ◽  
Fluid Transport ◽  
Metal Composite ◽  
Ionic Polymer ◽  
Piecewise Constant ◽  
Ciliary Motion ◽  
Thrust Generation ◽  
Artificial Cilia ◽  
Segmentation Pattern ◽  
Polymer Metal

Cilia are used effectively in a wide variety of biological systems from fluid transport to thrust generation. Here, we present the design and implementation of artificial cilia, based on a biomimetic planar actuator using soft-smart materials. This actuator is modelled on the cilia movement of the alga Volvox , and represents the cilium as a piecewise constant-curvature robotic actuator that enables the subsequent direct translation of natural articulation into a multi-segment ionic polymer metal composite actuator. It is demonstrated how the combination of optimal segmentation pattern and biologically derived per-segment driving signals reproduce natural ciliary motion. The amenability of the artificial cilia to scaling is also demonstrated through the comparison of the Reynolds number achieved with that of natural cilia.

scholarly journals How the type of input function affects the dynamic response of conducting polymer actuators

2014 ◽  
Vol 23 (10) ◽  
pp. 105008 ◽  
Author(s):  
Xingcan Xiang ◽  
Gursel Alici ◽  
Rahim Mutlu ◽  
Weihua Li
Keyword(s):  
Dynamic Response ◽  
Conducting Polymer ◽  
Input Function ◽  
Polymer Actuators

Design and Implementation of an Ionic-Polymer-Metal-Composite Aquatic Biomimetic Robot

2011 ◽  
Author(s):  
Yi-chu Chang ◽  
Won-jong Kim
Keyword(s):  
Input Signal ◽  
Smart Materials ◽  
Metal Composite ◽  
Ionic Polymer Metal Composite ◽  
Walking Robot ◽  
Ionic Polymer ◽  
Square Wave ◽  
Polymer Metal ◽  
Biomimetic Robot ◽  
Two Degree Of Freedom

Smart materials have been used in various applications. In this paper, a walking robot with six two-degree-of-freedom (2-DOF) legs made of ionic polymer metal composite (IPMC) is designed and implemented. Each leg can work as both a supporter and a driver, closely mimicking a real insect. To support and drive the robot, thicker (around 1 mm in thickness) IPMC strips were fabricated and used, and a 0.2-rad/s square wave is given as an input signal. The IPMC strips exhibit better performance in response to the square wave (8 mm) than sawtooth (4 mm) and sinusoidal (6 mm) waves in deflection. By applying this input signal in sequence, all the IPMC strips bend and walk in the form of six legs. In addition, thin magnet wires were used to supply power to each strip to prevent from confining the motion of our robot. Six lower legs are divided into two groups that work in the opposite directions to move the robot forward by turns. Upper legs are also divided into two groups to lift up their lower legs from making the robot to move back to the same place. The sizes of the IPMC strips and our robot (102 mm × 80 mm × 43 mm) were decided to exhibit better performance (0.5 mm/s) according to our tests.

Amino-functionalized graphene electrodes in ionic polymer actuators

2018 ◽  
Author(s):  
I. K. Khmelnitsky ◽  
N. I. Alekseyev ◽  
L. O. Vereschagina ◽  
A. P. Broyko ◽  
A. V. Lagosh ◽  
...  
Keyword(s):  
Functionalized Graphene ◽  
Ionic Polymer ◽  
Polymer Actuators
Sign in / Sign up

Export Citation Format

Share Document