Dielectric Elastomers as Electromechanical Transducers: by Federico Carpi, Danilo De Rossi, Roy Kornbluh, Ronald Edward PDF

By Federico Carpi, Danilo De Rossi, Roy Kornbluh, Ronald Edward Pelrine, Peter Sommer-Larsen

This e-book presents a accomplished and up to date perception into dielectric elastomers; the most promising sessions of polymer-based shrewdpermanent fabrics and applied sciences. This know-how can be utilized in a really extensive variety of purposes, from robotics and automation to the biomedical field.
The want for more advantageous transducer functionality has ended in enormous efforts in the direction of the improvement of units counting on fabrics with intrinsic transduction homes. those fabrics, frequently termed as "smart" or "intelligent", comprise stronger piezoelectrics and magnetostrictive or shape-memory fabrics. rising electromechanical transduction applied sciences, in keeping with so-called ElectroActive Polymers (EAP), have won substantial awareness. EAP provide the potential of functionality exceeding different shrewdpermanent fabrics, whereas conserving the fee and flexibility inherent to polymer fabrics. in the EAP relatives, "dielectric elastomers", are of specific curiosity as they exhibit sturdy performance, simplicity of constitution and robustness. Dielectric elastomer transducers are swiftly rising as high-performance "pseudo-muscular" actuators, invaluable for other kinds of projects. additional, as well as actuation, dielectric elastomers have additionally been proven to provide precise chances for more advantageous generator and sensing devices.
Dielectric elastomer transduction is permitting an important variety of recent functions that have been precluded to the other EAP or smart-material expertise till recently.
This e-book presents a finished and up to date perception into dielectric elastomer transduction, masking all its primary elements. The ebook bargains with transduction rules, uncomplicated fabrics homes, layout of effective machine architectures, fabric and equipment modelling, in addition to applications.
* Concise and finished remedy for practitioners and academics
* publications the reader in the course of the most modern advancements in electroactive-polymer-based technology
* Designed for ease of use with sections on basics, fabrics, units, versions and purposes

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Extra resources for Dielectric Elastomers as Electromechanical Transducers: Fundamentals, Materials, Devices, Models and Applications of an Emerging Electroactive Polymer Technology

Example text

For example, Larsen et al. [7] discussed how to tune rubber elasticity by manipulating the amount of cross-linking and mechanical processing and therefore the resulting stress–strain curve. This ‘tuning’ can allow for optimizing the breakdown and modulus, and could be of particular value in optimizing performance for given specific applications. g. [8]). Unfortunately, increases in dielectric constant are typically accompanied by an undesirable decrease in breakdown strength and an increase in electrical losses.

The viscosity and the elastic modulus are closely related, so one can follow the development of the elastic modulus as function of reaction time. In Fig. e. non-volatile solvent, is shown. At the steep parts of the curves, the gelation point is obtained. e. when G′(t) ϭ G″(t) and it usually occurs at where the curve is steepest [10]. e. G′(t;ϱ) ϭ 0. e. G′(t;ϱ) ϭ Go. However, for most traditional networks the reaction time is not a real parameter. For certain silicone networks catalysed by platinum catalyst, the vulcanization can be stopped by cooling down the reaction mixture and thereby inhibit the catalyst, which stops the network formation at a given time to give certain properties of the elastomer.

And Leo, D. J. (2004). Ionic liquids as novel solvents for ionic polymer transducers. In Smart Structures and Materials: Electroactive Polymer Actuators and Devices, Ed. Bar-Cohen, Y. SPIE Press, San Diego, CA, pp. 210–220. , Atkinson, K. R. and Baughman, R. H. (2004). Multifunctional carbon nanotube yarns by downsizing an ancient technology. Science, 306(5700), 1358–1361. Section II Materials Chapter 3 PHYSICAL AND CHEMICAL PROPERTIES OF DIELECTRIC ELASTOMERS Anne Ladegaard Skov1 and Peter Sommer-Larsen2 1 2 Department of Chemical Engineering, The Technical University of Denmark, Lyngby, Denmark Polymer Department, Risø National Laboratory, Roskilde, Denmark Abstract The basic physical and chemical properties of elastomers are essential for their use in dielectric elastomer actuators.

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