Download or read book Electro Active Polymer P VDF TrFE CFE MEMS Actuator written by Amir Reuveny and published by . This book was released on 2012 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electroactive Polymeric Materials written by Inamuddin and published by CRC Press. This book was released on 2022-04-28 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroactive polymers are smart materials that can undergo size or shape structural deformations in the presence of an electrical field. These lightweight polymeric materials possess properties such as flexibility, cost-effectiveness, rapid response time, easy controllability (especially physical to electrical), and low power consumption. Electroactive Polymeric Materials examines the history, progress, synthesis, and characterization of electroactive polymers and then details their application and potential in fields including biomedical science, environmental remediation, renewable energy, robotics, sensors and textiles. Highlighting the flexibility, lightweight, cost-effective, rapid response time, easy controllability, and low power consumption characteristics of electroactive polymers, respected authors in the field explore their use in sensors, actuators, MEMS, biomedical apparatus, energy storage, packaging, textiles, and corrosion protection to provide readers with a powerhouse of a reference to use for their own endeavors. Features: Explores the most recent advances in all categories of ionic/electroactive polymer composite materials Includes basic science, addresses novel topics, and covers multifunctional applications in one resource Suitable for newcomers, academicians, scientists and R&D industrial experts working in polymer technologies .

Download or read book Electroactive Polymer EAP Actuators as Artificial Muscles written by Yoseph Bar-Cohen and published by SPIE Press. This book was released on 2004 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the field of EAP with attention to all aspects and full infrastructure, including the available materials, analytical models, processing techniques, and characterization methods. This second edition covers advances in EAP in electric EAP, electroactive polymer gels, ionomeric polymer-metal composites, and carbon nanotube actuators.

Download or read book Nanostructured Electroactive Polymer Actuator Materials written by Junhong Lin and published by . This book was released on 2011 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Smart Structures and Materials written by and published by . This book was released on 2002 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biomedical Applications of Electroactive Polymer Actuators written by Federico Carpi and published by John Wiley & Sons. This book was released on 2009-04-13 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Giving fundamental information on one of the most promising families of smart materials, electroactive polymers (EAP) this exciting new titles focuses on the several biomedical applications made possible by these types of materials and their related actuation technologies. Each chapter provides a description of the specific EAP material and device configuration used, material processing, device assembling and testing, along with a description of the biomedical application. Edited by well-respected academics in the field of electroactive polymers with contributions from renowned international experts, this is an excellent resource for industrial and academic research scientists, engineers, technicians and graduate students working with polymer actuators or in the fields of polymer science.

Download or read book Smart Structures and Materials 2004 written by Yoseph Bar-Cohen and published by SPIE-International Society for Optical Engineering. This book was released on 2004 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.

Download or read book Smart Structures and Materials 1999 written by Yoseph Bar-Cohen and published by SPIE-International Society for Optical Engineering. This book was released on 1999 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MEMS MOEMS Components and Their Applications written by and published by . This book was released on 2004 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Electroactive Polymer Actuators for Next Generation Mirror written by Kritsadi Thetpraphi and published by . This book was released on 2020 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have developed new and interdisciplinary technology for creating extremely lightweight, diffraction-limited, meta-material-based optical systems with exceptional optical quality and spectacularly lower cost and production time: Live-Mirror. The novelty is to replace classical rigid and heavy optical mirrors with “live” and light dynamic optoelectronic systems consisting of a thin optical glass sheet actively supported by multiple force-actuators/sensors integrated and miniaturized via additive manufacturing and 3D printing. Our breakthrough Live-Mirror features and active shape control with many-degrees-of-freedom force actuators achieved by developing an additive 3D-printing-based technology to apply an optimized electroactive polymer (EAP) systems to a sandwich of thin glass surfaces, thus creating a novel hybrid meta-material with superior stiffness-to-density ratio properties. This thesis describes the development of soft actuators based on modified/doped EAPs, here dubbed terpolymer P(VDF-TrFE-CFE). We will show that this new and Live-Mirror customized terpolymer matrix features an outstanding electromechanical coupling property, particularly when doped with a plasticizer, e.g. diisononyl phthalate (DINP). Here we demonstrate that by optimizing the structured multilayer design, the electromechanical coupling of the modified terpolymer can be enhanced, yielding high dielectric permittivity, low Young modulus, and exceptional dielectric strength. This leads to a large strain response as well as high mechanical energy density under relatively low electric fields according to the electrostriction phenomenon - the main goal of the high-level specifications of Live-Mirror. In addition to a customized terpolymer matrix, the concept of stacked multilayers is demonstrated as a simple and effective technique to boost actuation abilities. Several 3D-printed, proof-of-concept (in the lab) experimental results, which are in good agreement with numerical models, validate the actuator performance with a large electromechanical response. This technology shows feasibility for active optical surface shape control and demonstrates the Live-Mirror optical shape control and correction with only a few degrees-of-freedoms. Such a novel and advanced actuator application via additive manufacturing technology are compliant for ground- and space-based astronomy and communications telescopes as well as many modern electronic devices.

Download or read book Electromechanical Characteri ation of Poly dimethyl Siloxane Based Electroactive Polymer written by Wrutu Deepak Parulkar and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objectives of this thesis are 1) to evaluate the effect of cross-linking polar cyano phenyl (CN) groups on poly (dimethyl siloxane) (PDMS) and 2) to characterize the electromechanical properties of the resulting CN-PDMS blend as an electroactive actuator. Materials responding to an external stimulus are referred to as electroactive materials. There are several phenomena, which govern the mechanism in these materials, such as piezoelectricity, Maxwell's effect, ferroelectricity, electrostriction to name a few. These electroactive materials can be employed in several applications such as biomedical devices, robots, MEMs, aerospace vehicles, where the application is governed by the specific mechanism. However in order for the materials to be used effectively, they need to be thoroughly characterized to understand their behavior under factors like electric field, temperature, frequency and time. The present work focuses on developing an electroactive actuator, which has tailorable properties, allowing a wide operational temperature window from -100 °C to 200 °C and stability in harsh conditions. The characterization of the CN-PDMS polymer blend is done in two folds. First the physical properties of the polymer system are characterized by performing tests such as Dielectric Spectroscopy, Differential Scanning Calorimetery and Thermally Stimulated Current measurement. These techniques offer complete understanding of the structure-property relationship and effects of the functional groups on the dielectric and relaxation behavior of the polymer. The Dielectric Spectroscopy and the Thermally Stimulated Current analysis are used to elucidate the primary and the secondary relaxations, such as molecular mobility, interfacial polarization and dipolar relaxation. Dielectric Spectroscopy reveals that the molecular weight of PDMS does not affect the dielectric permittivity of the polymer blend. Also, Dielectric Spectroscopy clarifies the role of the CN polar group in the polarization of the CN-PDMS blend, inducing electromechanical strain in the polymer blend through electrostriction. The Differential Scanning Calorimetery is used to quantify the thermal behavior of the CN-PDMS polymer blend by quantifying properties such as melting temperature (Tm) and re-crystallization temperature of the PDMS polymer cross-linked with CN functional group. Results reveal that the thermal characteristics of the blend are not affected when PDMS is cross-linked with the functional CN moieties, meaning CN-PDMS maintains the advantages of PDMS in terms of stability towards harsh conditions, wide operating temperature and resistance to ultraviolet radiations. Following the physical characterization, electromechanical characterization of the CN-PDMS polymer blend is done to assess the electromechanical strain induced in the blend in response to electric field. The electromechanical strain is studied in two configurations; the electromechanical strain induced along the length of the polymer blend and induced through the thickness of the blend. These strain measurements are performed by applying both direct current as well as alternating current electric fields, and the induced electromechanical strain is studied as a function of amplitude and frequency of the electric field as well as the time of application of the electric field. The mechanism behind the development of the electromechanical strain and the nature of the strain under electric field is elucidated. The performance of the electroactive polymer is compared with several other polymeric actuators such as PVDF and PVDF-TrFE, polyurethane based actuators and ionomers. Comparison gives favorable results in terms of strains. In addition, CN-PDMS polymer system has the advantage of allowing control of processing of the blend, which is not present in all the other commercial electroactive polymers. The maximum electromechanical strain yielded along the length of the CN-PDMS polymer blend is 1.74 % when an electric field of 0.2MV/m is applied along the length of the polymer. Through the thickness, the maximum induced strain is 0.12 % for an electric field of 0.8 MV/m. Based on the nature of the strain yielded it is observed that the strain induced in the CN-PDMS blend is consistently proportional to the square of the electric field (E2). Moreover, the strain is driven by the concentration of the dipolar moieties (CN) present in the polymer blend. All the above-mentioned techniques used for thermal and electromechanical characterization of the CN-PDMS polymer blend illustrate the electrostrictive nature of the polymer under the study.

Download or read book Innovative Materials and Systems for Energy Harvesting Applications written by Mescia, Luciano and published by IGI Global. This book was released on 2015-04-30 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wearable electronics, wireless devices, and other mobile technologies have revealed a deficit and a necessity for innovative methods of gathering and utilizing power. Drawing on otherwise wasted sources of energy, such as solar, thermal, and biological, is an important part of discovering future energy solutions. Innovative Materials and Systems for Energy Harvesting Applications reports on some of the best tools and technologies available for powering humanity’s growing thirst for electronic devices, including piezoelectric, solar, thermoelectric, and electromagnetic energies. This book is a crucial reference source for academics, industry professionals, and scientists working toward the future of energy.

Download or read book Modeling and Design of Wearable Transducers for Assistive Technologies written by Tahzib Safwat and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wearable technology is a growing and highly interdisciplinary field, with research being conducted in many areas, including micro-electromechanical systems (MEMS), flexible sensors and actuators, energy harvesting, and human factors. In this dissertation, facets of wearable technology that are beneficial to healthcare and assistive technologies are explored. Polyvinylidene fluoride (PVDF) terpolymer actuators are applied to wearable haptics, electromagnetic (EM) harvesters are compared to PVDF films as strain energy harvesters, PVDF copolymer films are used for body-based energy harvesting, and a statistical analysis of an energy harvesting system model with storage is presented.People with prosthetic limbs can benefit from having haptic feedback that mimics a sense of touch. Electroactive polymer (EAP) actuators made of PVDF terpolymer, P(VDF-TrFE-CFE), have the potential to fill this need due to their compliance and ability to provide high strains. An EAP unimorph actuator is modeled for haptic feedback applications and shown to have flexibility, high frequency vibration capability (3mm end-to-end tip deflection at a resonance of 429Hz for a 10mm long beam), and high amplitude vibration at low frequency (tip deflection of up to 825m for 10mm long beam) that provides a new way to send haptic signals by combining high frequency vibration with a slowly varying DC offset. A linear time-varying model is validated with experiments under static and slowly varying bias voltages. These actuators are demonstrated in a prosthetic feedback application and rotary motor prototype. The rotary motor is also used to calculate the maximum power density of the EAP active material, of at least 0.27W/g in the unimorph configuration, competitive with electric motors.Continuous monitoring of patients using low power sensors can help in tracking and treatment of chronic illnesses and other health conditions. Chest motion is investigated as a continuous source of strain energy from the body to power wearable health monitors. EM generator and piezoelectric PVDF film harvesters are modeled, designed, and experimentally tested. Static friction effects in the EM generators and their bulky profile make them poorly suited to this application. Piezoelectric PVDF films produce much lower power than EM, but their power scales with surface area and the films can be integrated into textiles. Under the force required by the EM harvester to break away from static friction, a PVDF film of 100cm^2 can produce up to 10W. This, combined with their low weight and bending stiffness, make them ideal for wearables.To increase the power output from wearable piezoelectric energy harvesters, the PVDF copolymer, P(VDF-TrFE), connected in 33-mode via interdigitated electrodes (IDEs), is investigated. Copolymer is a highly compliant multifunctional material with superior electromechanical properties. Model-based analysis shows that its output power per force, a metric important for comfort, is greater than PVDF. A novel electrode design, interlaminar grid electrodes (IGEs), is used to align strain and poling directions similar to IDEs. However, electrodes of opposite electrical polarity are applied on different surfaces of the copolymer films, as in parallel plate electrode (PPE) configurations, helping to reduce fabrication defect-related shorting and open circuits. The ability to pattern electrodes with micron-scale features such as IGEs over large areas of copolymer thin films is a great asset to building wearable electromechanical devices. Additionally, the ability to pattern micron-sized electrode features at the interface between the layers of multilayer copolymer is required for IGEs and improves the performance of IDEs. A process to create multilayered copolymer with patterned electrodes using PVA and alumina capping layers is presented. Although alumina has closer dielectric properties to copolymer, very thin layers of PVA provide good chemical resistance without affecting the capacitance of the device.The self-power ability of a wearable device depends on how much energy is available for harvesting. Energy availability strongly depends on human behavior, including the activities that people do and the environments that they do them in. The intermittency of power generation limits the ability of an energy harvester to self-power a wearable device. Information from databases on human behavior and solar irradiance are used to estimate the average power that can be harvested from large populations. For three demographic groups (retired people, children, and office professionals), mechanical, thermoelectric, and photovoltaic harvesters worn on the wrist/forearm are simulated with supercapacitors that bridge power mismatches between the harvested power and power demand (assumed constant). The average solar power harvested, approximately 50-70W, is an order of magnitude higher than mechanical or thermoelectric power, both of which harvest less than 10W on average. Intermittency causes the solar (and mechanical) energy harvesters to achieve a 90% success rate of self-powering when the constant power consumption is a low 30-35% of their average harvested power. Thermoelectric generators, on the other hand, can provide 87% of their average harvested power with 90% success rate.

Download or read book Nanoengineered Assemblies and Advanced Micro Nanosystems Volume 820 written by Materials Research Society. Meeting and published by . This book was released on 2004-09-09 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners.

Download or read book Nanostructured Thin Films written by Maria Benelmekki and published by Elsevier. This book was released on 2019-08-25 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured Thin Films: Fundamentals and Applications presents an overview of the synthesis and characterization of thin films and their nanocomposites. Both vapor phase and liquid phase approaches are discussed, along with the methods that are sufficiently attractive for large-scale production. Examples of applications in clean energy, sensors, biomedicine, anticorrosion and surface modification are also included. As the applications of thin films in nanomedicine, cell phones, solar cell-powered devices, and in the protection of structural materials continues to grow, this book presents an important research reference for anyone seeking an informed overview on their structure and applications. Shows how thin films are being used to create more efficient devices in the fields of medicine and energy harvesting Discusses how to alter the design of nanostructured thin films by vapor phase and liquid phase methods Explores how modifying the structure of thin films for specific applications enhances their performance

Download or read book The Journal of the Korean Physical Society written by and published by . This book was released on 2006 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polymer Nanocomposite Materials written by Ye Zhou and published by John Wiley & Sons. This book was released on 2021-03-24 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Nanocomposite Materials Discover an authoritative overview of zero-, one-, and two-dimensional polymer nanomaterials Polymer Nanocomposite Materials: Applications in Integrated Electronic Devices delivers an original and insightful treatment of polymer nanocomposite applications in energy, information, and biotechnology. The book systematically reviews the preparation and characterization of polymer nanocomposites from zero-, one-, and two-dimensional nanomaterials. The two distinguished editors have selected resources that thoroughly explore the applications of polymer nanocomposites in energy, information, and biotechnology devices like sensors, solar cells, data storage devices, and artificial synapses. Academic researchers and professional developers alike will enjoy one of the first books on the subject of this environmentally friendly and versatile new technology. Polymer Nanocomposite Materials discusses challenges associated with the devices and materials, possible strategies for future directions of the technology, and the possible commercial applications of electronic devices built on these materials. Readers will also benefit from the inclusion of: A thorough introduction to the fabrication of conductive polymer composites and their applications in sensors An exploration of biodegradable polymer nanocomposites for electronics and polymer nanocomposites for photodetectors Practical discussions of polymer nanocomposites for pressure sensors and the application of polymer nanocomposites in energy storage devices An examination of functional polymer nanocomposites for triboelectric nanogenerators and resistive switching memory Perfect for materials scientists and polymer chemists, Polymer Nanocomposite Materials: Applications in Integrated Electronic Devices will also earn a place in the libraries of sensor developers, electrical engineers, and other professionals working in the sensor industry seeking an authoritative one-stop reference for nanocomposite applications.