Готові списки джерел за темами / Polymer Metal Composite

Добірка наукової літератури з теми "Polymer Metal Composite"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Polymer Metal Composite"

1

Übelacker, David, Johannes Hohmann, and Peter Groche. "Force Requirements in Shear Cutting of Metal-Polymer-Metal Composites." Advanced Materials Research 1018 (September 2014): 137–44. http://dx.doi.org/10.4028/www.scientific.net/amr.1018.137.

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Анотація:
New approaches in lightweight design require the use of multi materials like metalpolymermetal composites. Composite materials, especially so-called sandwich panels, offer the possibility to combine properties of different materials synergistically. Shear cutting is one of the commonly used manufacturing processes. However, conventional shear cutting of sandwich panels leads to characteristic types of failure, such as high bending of the facings, delamination effects, burr formation and an undefined cracking of the core material. In the present research, the cutting force requirement and the failure progress for lubricant free shear cutting of metal-polymer-metal composites is studied. Two thermoplastic polymers, an aluminum sheet and an unalloyed steel sheet are combined in order to create different composite materials. Furthermore, the composite materials are cut stepwise to examine the different stages of a cutting process in detail.
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2

Huang, Liangsong, Yu Hu, Yun Zhao, and Yuxia Li. "Modeling and Control of IPMC Actuators Based on LSSVM-NARX Paradigm." Mathematics 7, no. 8 (August 13, 2019): 741. http://dx.doi.org/10.3390/math7080741.

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Анотація:
Ionic polymer-metal composites are electrically driven intelligent composites that are readily exposed to bending deformations in the presence of external electric fields. Owing to their advantages, ionicpolymer-metal composites are promising candidates for actuators. However, ionicpolymer-metal composites exhibit strong nonlinear properties, especially hysteresis characteristics, resulting in severely reduced control accuracy. This study proposes an ionic polymer-metal composite platform and investigates its modeling and control. First, the hysteresis characteristics of the proposed Pt-electrode ionic polymer-metal composite are tested. Based on the hysteresis characteristics, ionic polymer-metal composites are modeled using the Prandtl-Ishlinskii model and the least squares support vector machine-nonlinear autoregressive model, respectively. Then, the ionic polymer-metal composite is driven by a random sinusoidal voltage, and the LSSVM-NARX model is established on the basis of the displacement data obtained. In addition, an artificial bee colony algorithm is proposed for accuracy optimization of the model parameters. Finally, an inverse controller based on the least squares support vector machine-nonlinear autoregressive model is proposed to compensate the hysteresis characteristics of the ionic polymer-metal composite. A hybrid PID feedback controller is developed by combining the inverse controller with PID feedback control, followed by simulation and testing of its actual position control on the ionic polymer-metal composite platform. The results show that the hybrid PID feedback control system can effectively eliminate the effects of the hysteresis characteristics on ionic polymer-metal composite control.
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3

Annabestani, Mohsen, Nadia Naghavi, and Mohammad Maymandi-Nejad. "From modeling to implementation of a method for restraining back relaxation in ionic polymer–metal composite soft actuators." Journal of Intelligent Material Systems and Structures 29, no. 15 (July 24, 2018): 3124–35. http://dx.doi.org/10.1177/1045389x18783082.

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Анотація:
Ionic polymer–metal composites are an emerging kind of electroactive polymer actuators, which can bend in response to a relatively low driving voltage. However, to enhance the actuation performance of ionic polymer–metal composites, some of their drawbacks should be considered. One of the most important drawbacks is “back relaxation.” The so-called back relaxation effect means, when a step input voltage is applied to the ionic polymer–metal composite, the conventional bending displacement toward the anode is followed by an unwanted and slow back relaxation toward the cathode. Control-based methods for restraining the ionic polymer–metal composite back relaxation effect are feedback-based schemes which apply significant constraints to dominant applications of ionic polymer–metal composite actuators especially in biomedical applications. In this article, we present an entirely scientific-based mathematical modeling to achieve a practical method for restraining the back relaxation effect in Nafion-based ionic polymer–metal composites, relying on creating a specific pattern on Pt layers of the ionic polymer–metal composites and applying a local Gaussian disturbance to this patterned ionic polymer–metal composites.
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Kumar, Ponnusamy Senthil, and P. R. Yaashikaa. "Ionic Polymer Metal Composites." Diffusion Foundations 23 (August 2019): 64–74. http://dx.doi.org/10.4028/www.scientific.net/df.23.64.

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Анотація:
Electroactive polymers, or EAPs, are polymers that show an adjustment fit as a fiddle when invigorated by an electric field. Ionic polymer metal composites (IPMCs) are electro-dynamic polymers with great electromechanical coupling properties. They are proficient applicants in many progressed innovative applications, for example, actuators, artificial muscles, biomimetic sensors, and so forth. Type of membrane and electrodes determines the morphology and structure of IPMCs. IPMCs can be prepared using physical loading, chemical deposition and electroplating methods. The assembling of anodes for IPMCs is exceptionally basic in their electromechanical coupling. Optimization of force, determination of cations and molecule size dispersal inside the IPMC structure, and so on are the different components, which decides their proficiency. An ionic polymer-metal composite (IPMC) comprising of a thin Nafion sheet, platinum plated on the two side faces, experiences extensive twisting movement when an electric field is connected over its thickness. Then again, a voltage is created over its appearances when it is all of a sudden bends. IPMCs are best known for their proving advantages such as biocompactible, low activating voltage and more power efficiency
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Tahir, Furqan, Abdelnasser Mabrouk, Sami G. Al-Ghamdi, Igor Krupa, Tomas Sedlacek, Ahmed Abdala, and Muammer Koc. "Sustainability Assessment and Techno-Economic Analysis of Thermally Enhanced Polymer Tube for Multi-Effect Distillation (MED) Technology." Polymers 13, no. 5 (February 24, 2021): 681. http://dx.doi.org/10.3390/polym13050681.

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Анотація:
Metal-alloys tubes are used in the falling-film evaporator of the multi-effect distillation (MED) that is the dominant and efficient thermal seawater desalination process. However, the harsh seawater environment (high salinity and high temperature) causes scale precipitation and corrosion of MED evaporators’ metal tubes, presenting a serious technical challenge to the process. Therefore, the metal/metal alloys used as the material of the MED evaporators’ tubes are expensive and require high energy and costly tube fabrication process. On the other hand, polymers are low-cost, easy to fabricate into tubes, and highly corrosion-resistant, but have low thermal conductivity. Nevertheless, thermally conductive fillers can enhance the thermal conductivity of polymers. In this article, we carried out a feasibility-study-based techno-economic and socioeconomic analysis, as well as a life-cycle assessment (LCA), of a conventional MED desalination plant that uses titanium tubes and a plant that used thermally enhanced polymer composites (i.e., polyethylene (PE)-expanded graphite (EG) composite) as the tubes’ material. Two different polymer composites containing 30% and 40% filler (expanded graphite/graphene) are considered. Our results indicate that the MED plant based on polymer composite tubes has favored economic and carbon emission metrics with the potential to reduce the cost of the MED evaporator (shell and tubes) by 40% below the cost of the titanium evaporator. Moreover, the equivalent carbon emissions associated with the composite polymer tubes’ evaporator is 35% lower than titanium tubes. On the other hand, the ozone depletion, acidification, and fossil fuel depletion for the polymer composite tubes are comparable with that of the titanium tubes. The recycling of thermally enhanced polymers is not considered in this LCA analysis; however, after the end of life, reusing the polymer material into other products would lower the overall environmental impacts. Moreover, the polymer composite tubes can be produced locally, which will not only reduce the environmental impacts due to transportation but also create jobs for local manufacturing.
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6

Guo, Xiaomin, Bin Zheng, and Jinlei Wang. "Controllable Synthesis of Metal-Organic Framework/Polyethersulfone Composites." Crystals 10, no. 1 (January 15, 2020): 39. http://dx.doi.org/10.3390/cryst10010039.

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Анотація:
Composite materials that contain metal-organic frameworks (MOFs) as a filler and a polymer matrix have attracted attention because they present a combination of high porosity and structural integrity. Phase compatibilities of the MOF and polymer play a vital role in the formation of the composites. In particular, the stiff polymer cannot easily adapt to penetrate into the surface pore of MOF and mainly depends on chemical attractions to form the MOF/polymer composites. We report the synthesis of MOF/polyethersulfone (Young’s modulus = ~2.6 GPa) via different fabrication methods, different MOF types and particle sizes, and different solvents. The formed network structures are robust, monolithic composites with 60% MOF loadings; also, the MOF surface area and porosity were fully preserved. The study explored the formation of the composite between MOF and a stiff polymer and encourages the design of more MOF/polymer composite materials across a wide range of applications.
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7

Wang, P. H., and Cai-Yuan Pan. "Polymer metal composite microspheres." European Polymer Journal 36, no. 10 (October 2000): 2297–300. http://dx.doi.org/10.1016/s0014-3057(00)00069-0.

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Singh, Reeti, Ján Kondás, and Christian Bauer. "Connecting Polymers and Metals Using Cold Gas Spray." AM&P Technical Articles 176, no. 8 (November 1, 2018): 38–40. http://dx.doi.org/10.31399/asm.amp.2018-08.p038.

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Анотація:
Abstract Coating development using cold gas spray technology demonstrates the feasibility of bonding polymers to metal substrates and metals to polymer composite substrates with good adhesion. The examples addressed are polyetheretherketone (PEEK) coatings on steel and aluminum substrates and metallic coatings on carbon fiber reinforced polymer (CFRP) composites.
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Tran, Vinh Van, Truong Thi Vu Nu, Hong-Ryun Jung, and Mincheol Chang. "Advanced Photocatalysts Based on Conducting Polymer/Metal Oxide Composites for Environmental Applications." Polymers 13, no. 18 (September 8, 2021): 3031. http://dx.doi.org/10.3390/polym13183031.

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Анотація:
Photocatalysts provide a sustainable method of treating organic pollutants in wastewater and converting greenhouse gases. Many studies have been published on this topic in recent years, which signifies the great interest and attention that this topic inspires in the community, as well as in scientists. Composite photocatalysts based on conducting polymers and metal oxides have emerged as novel and promising photoactive materials. It has been demonstrated that conducting polymers can substantially improve the photocatalytic efficiency of metal oxides owing to their superior photocatalytic activities, high conductivities, and unique electrochemical and optical properties. Consequently, conducting polymer/metal oxide composites exhibit a high photoresponse and possess a higher surface area allowing for visible light absorption, low recombination of charge carriers, and high photocatalytic performance. Herein, we provide an overview of recent advances in the development of conducting polymer/metal oxide composite photocatalysts for organic pollutant degradation and CO2 conversion through photocatalytic processes.
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10

Augustyn, Piotr, Piotr Rytlewski, Krzysztof Moraczewski, and Adam Mazurkiewicz. "A review on the direct electroplating of polymeric materials." Journal of Materials Science 56, no. 27 (June 24, 2021): 14881–99. http://dx.doi.org/10.1007/s10853-021-06246-w.

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Анотація:
AbstractThis work is a review of the literature on the possibilities for electroplating of polymer materials. Methods of metalizing polymers and their composites were presented and discussed. Information from various publications on the electrical properties of polymers and polymer composites was collected and discussed. The most important results on the electroplating of conductive polymers and conductive composites were presented and compared. This work especially focuses on the electrical conductivity of polymer materials. The main focus was the efficiency of metal electrodeposition. Based on the analyzed publications, it was found that electrically deposited metal layers on conductive polymeric materials show discontinuity, considerable roughness, and different layer thickness depending on the distance from the contact electrode. The use of metal nanoparticles (AgNWs) or nickel nanoparticles (NiNPs) as a filler enables effective metallization of the polymer composite. Due to the high aspect ratio, it is possible to lower the percolation threshold with a low filler content in the polymer matrix. The presented review reveals many of the problems associated with the effectiveness of the electroplating methods. It indicates the need and direction for further research and development in the field of electroplating of polymer materials and modification of their electrical properties.
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Дисертації з теми "Polymer Metal Composite"

1

Mokhtari, Morgane. "FeCr composites : from metal/metal to metal/polymer via micro/nano metallic foam, exploitation of liquid metal dealloying process." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI088/document.

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Анотація:
Les métaux micro ou nanoporeux sont très attrayants notamment pour leur grande surface spécifique. Le désalliage dans un bain de métal liquide permet une dissolution sélective d'une espèce chimique (l'élément soluble) à partir d'un alliage d'origine (le précurseur) composé de l'élément soluble et d'un élément cible (qui deviendra nano/micro poreux) non soluble dans le bain de métal liquide. Quand le précurseur est plongé dans le bain de métal liquide, à son contact, l'élément soluble va se dissoudre dans le bain tandis que l'élément cible va en parallèle se réorganiser spontanément afin de former une structure poreuse. Quand l'échantillon est retiré du bain, il est sous la forme d'une structure bi-continue composée de deux phases : l'une étant la structure poreuse composée de l'élément cible et l'autre est une phase dans laquelle est présente l'élément du bain avec l'élément sacrificiel en solution solide. Cette phase peut être dissoute par une attaque chimique afin d’obtenir le métal nano/micro poreux. Les objectifs principaux de cette thèse sont l'élaboration et la caractérisation microstructurale et mécanique de 3 différents types de matériaux par désalliage dans un bain de métal liquide : des composites métal-métal (FeCr-Mg), des métaux poreux (FeCr) et des composites métal-polymère (FeCr-matrice époxy). Le dernier objectif est l'évaluation des possibilités d'utiliser la technique de désalliage dans un bain de métal liquide dans un contexte industriel. L'étude de la microstructure est basée sur des observations 3D faites par tomographie aux rayons X et des analyses 2D réalisées en microscopie électronique (SEM, EDX, EBSD). Pour mieux comprendre le désalliage, le procédé a été suivi in situ en tomographie aux rayons X et diffraction. Enfin, les propriétés mécaniques ont été évaluées par nanoindentation et compression
Nanoporous metals have attracted considerable attention for their excellent functional properties. The first developed technique used to prepare such nanoporous noble metals is dealloying in aqueous solution. Porous structures with less noble metals such as Ti or Fe are highly desired for various applications including energy-harvesting devices. The less noble metals, unstable in aqueous solution, are oxidized immediately when they contact water at a given potential so aqueous dealloying is only possible for noble metals. To overcome this limitation, a new dealloying method using a metallic melt instead of aqueous solution was developed. Liquid metal dealloying is a selective dissolution phenomenon of a mono-phase alloy solid precursor: one component (referred as soluble component) being soluble in the metallic melt while the other (referred as targeted component) is not. When the solid precursor contacts the metallic melt, only atoms of the soluble component dissolve into the melt inducing a spontaneously organized bi-continuous structure (targeted+sacrificial phases), at a microstructure level. This sacrificial phase can finally be removed by chemical etching to obtain the final nanoporous materials. Because this is a water-free process, it has enabled the preparation of nanoporous structures in less noble metals such as Ti, Si, Fe, Nb, Co and Cr. The objectives of this study are the fabrication and the microstructure and mechanical characterization of 3 different types of materials by dealloying process : (i) metal/metal composites (FeCr-Mg), (ii) porous metal (FeCr) (iii) metal/polymer composites (FeCr-epoxy resin). The last objective is the evaluation of the possibilities to apply liquid metal dealloying in an industrial context. The microstructure study was based on 3D observation by X-ray tomography and 2D analysis with electron microscopy (SEM, SEM-EDX, SEM-EBSD). To have a better understanding of the dealloying, the process was followed in situ by X-ray tomography and X-ray diffraction. Finally the mechanical properties were evaluated by nanoindentation and compression
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2

Bhat, Nikhil Dilip. "Modeling and precision control of ionic polymer metal composite." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/1152.

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Анотація:
This thesis describes the open-loop behavior of an ionic polymer metal composite (IPMC) strip as a novel actuator, the empirical force and position models, the control system and the improved dynamic characteristics with the feedback control implemented. Ionic polymer metal composite is a novel polymer in the class of electroactive polymers. IPMC consists of a base polymer coated with electrodes made up of highly conducting pure metals such as gold. The actuation behavior of IPMC can be attributed to the bending of an IPMC strip upon application of voltage across its thickness. The main reasons for the bending are ion migration on the application of voltage and swelling and contraction caused by water content. An experimental setup to study the open-loop force and tip displacement of an IPMC strip in a cantilever configuration was developed, and real time controllers were implemented. In open loop, the force response of the IPMC strip of dimensions 25 mm x 3.9 mm x 0.16 mm to a 1.2-V step input is studied. The open-loop rise time was 0.08 s and the percent overshoot was 131.62 %, while the settling time was about 10 s. Based on this open-loop step response using a least-square curve-fitting methodology, a fourth-order empirical transfer function from the voltage input to the force output was derived. The tip displacement response of an IPMC strip of dimensions 23 mm x 3.96 mm x 0.16 mm to a 1.2-V step input was also studied. The step response exhibited a 205.34 % overshoot with a rise time of 0.08 s, and the settling time was 27 s. A fourth-order empirical transfer function from the step input to the tip displacement as output was also derived. Based on the derived transfer functions lead-lag feedback controllers were designed for precision control of both force and displacement. The control objectives were to decrease the settling time and the percent overshoot, and achieve reference input tracking. After implementing the controllers, the percent overshoot decreased to 30% while the settling time was reduced to 1.5 s in case of force control. With position control, the settling time was reduced to 1 s while the percent overshoot decreased to 20%. Precision micro-scale force and position-control capabilities of the IPMC were also demonstrated. A 4 ?N force resolution was achieved, with a force noise of 0.904-?N rms. The position resolution was 20 ?m with a position noise of 7.6-?m rms.
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3

Yusuf, Suhaila Mohamad. "Development of an ionic polymer metal composite (IPMC) microgripper." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.550855.

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Анотація:
Ionic Polymer Metal Composite (IPMC) is a class of electroactive polymer , that is receiving great attention due to its advantages of large bending deflection, low power consumption and driving voltage. Although there is still no commercial application of IPMC, it has been actively investigated by researchers for the past decade. The IPMC has been identified as a potential material to be used in the specific application of sensor and/or actuation, such as microgripper and micropump. This research deals with the characterisation of small scale IPMC with the ultimate objective to develop a simple microgripper to demonstrate the ability of the IPMC to grasp a micro object. A vision system has been developed to perform image processing to measure the displacement of IPMC. New algorithms of edge detection and displacement measurement have been introduced to characterise the IPMC. Comparison between laser sensor measurements and vision systems measurement has been carried out and the results showed that the vision system is a reliable measurement. Characterisation of small scale IPMC is carried out to prove the claim that miniaturization of IPMC is possible without degrading its performance. The characterisation of the IPMC actuator is divided into two major works - the displacement and blocked force measurements. The results showed that small scale characteristics are in line with the results that have been published by other researchers for larger scale of IPMC, hence supported the claim. The dynamic sensory behaviour of the IPMC has also been characterised. The results showed that the sensor functions are better in terms of producing consistent output signals when it is dehydrated. With such finding, the possibility of using the IPMC as the actuator and sensor at the same time for micro gripper application is not promising because the actuator needs to be fully hydrated in order to work better while the sensor is working better in a dehydrated condition. The final part in this research work is to develop a simple micro gripper. A two-finger microgripper with size of lOmm x 2rnrn x O.2mm is controlled by a vision feedback system to grasp small objects. For a demonstration purposes, an object with diameter of lmm was successfully grasped in 4.6 seconds.
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4

Anyaogu, Kelechi C. "Stabilized metal nanoparticle-polymer composites preparation, characterization and potential applications /." Bowling Green, Ohio : Bowling Green State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1222126708.

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5

Graham, Adam. "Electrical properties and vapour sensing characteristics of a novel metal-polymer composite." Thesis, Durham University, 2008. http://etheses.dur.ac.uk/2376/.

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Анотація:
Quantum Tunnelling Composite (QTC) is a metal polymer composite, commercialised and produced using a patented manufacture process. This process ensures that the metal particles within an elastomerie polymer matrix maintain a highly fractal surface morphology where nano-scale point features are retained on the particles and are coated in polymer. This structure provides unique electronic behaviour including very high resistivity, of order 10 ΜΩ, above the expected percolation threshold and an exponential increase in conductivity under all types of mechanical deformation. Increase in sample compression leads to a lower electrical resistance through the material. Current-voltage characteristics show a hysteresis effect due to current storage in the QTC material as a current is passed. The hysteresis is shown to be reduced as the applied compression on the material is increased until an Ohmic regime is reached at very high compressions, above 70% linear compression. At these high compressions Joule heating is also proven to occur as a result of the power dissipated in the sample by I-V cycling. The Joule heating is sufficient to influence the physical characteristics of the sample and expand it, creating a current limiting device. QTC samples loaded with acicular electro-conductive particles in small fractions, less than 10% by weight, showed less sensitivity to applied compression in terms of electrical response. These samples appear to exhibit less white noise characteristics and indicate a combination of field assisted quantum tunnelling and percolation mechanism, Intrinsically conductive QTC samples were developed. These were made using QTC granules mixed into a polymer solvent solution. Upon depositing onto electrodes the solvent was allowed to evaporate leaving the constituent polymer binding the QTC granules together, compressing them into a conductive state. Samples were exposed to volatile organic compound (VOC) vapours in the concentration range 10 ppm to 100,000 ppm, causing swelling and void filling in the binding polymer. Combinations of these processes caused an increase in sample resistance, from ~50 Ω to excess of 10 ΜΩ. Sample composition and physical parameters have significant effect upon the response characteristics of the sensors. A system of experiments was undertaken and optimum sample composition was determined. Response to environmental changes were investigated^ namely temperature response and response to varying concentration of exposed solvent. It was found that samples produced using Polyphenylene Oxide ( PPO) and Polyvinyl Chloride (PVC) based binding polymer were more resistant to temperature change from 30 С to 80 С due to their molecular structures. Sensor response to different vapour concentrations was found to exhibit two distinct response regimes. High concentration exposures were found to exhibit a swelling mechanism with a CASE-II diffusion model fitting the data well. Whereas at low concentrations a void-filling based change in sample dielectric constant was attributed to the electronic response to vapour exposure. These predictions were also confirmed using a Quartz Crystal Microbalance (QCM) to measure mass uptake of vapour molecules and polymer density under similar test conditions.
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6

Skinner, Anna Penn. "Ion Conducting Polyelectrolytes in Conductive Network Composites and Humidity Sensing Applications for Ionic Polymer-Metal Composite Actuators." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/71683.

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Анотація:
Ionic polymer-metal composites (IPMCs) are widely studied for their potential as electromechanical sensors and actuators. Bending of the IMPC depends on internal ion motion under an electric potential, and the addition of an ionic liquid and ionic self-assembled multilayer (ISAM) conductive network composite (CNC) strongly enhances bending and improves lifetime. Ion conducting polyelectrolytes poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) and Nafion® were incorporated into an ISAM CNC film with poly(allylamine hydrochloride) (PAH) and anionic gold nanoparticles actuators to further improve bending. CNC films were optimized for bending through pH adjustments in PAH and adding NaCl to the PAMPS and Nafion® solutions. PAMPS-containing actuators showed larger and faster bending than those containing Nafion® in the CNC. The IPMC actuator was also evaluated for its potential as a humidity sensor based on its relative humidity (RH) dependent steady-state current. The detection range is at least 10-80%RH, with 5%RH increment differentiation and likely better resolution. Effects of CNC presence and thickness were studied, in conjunction with ionic liquid at a range of RH values. A thin CNC (pH 4 PAH) produced the greatest current differentiation between RH values. The current's response speed to a large RH decrease was approximately 4 times faster than that of a fast commercial digital hygrometer. Additionally, the presence of a CNC and ionic liquid improved the current response time. These results indicate that an IPMC based humidity sensor using a CNC and ionic liquid is very promising and merits further study.
Master of Science
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7

Sun, Weizhen. "Microstructure-based FE Modeling and Measurements of Magnetic Properties of Polymer Matrix-Metal Composites." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/74946.

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Анотація:
An increasing need for smaller, higher-power-density devices is driving the development of more advanced topologies for use in power architectures. The challenge, however, is to reduce the size of the passive components in circuit boards (e.g., the inductors), which are typically the most bulky. There are two ways to approach this problem. The first is to redesign the flux in the inductor in order to minimize its size; the second is to optimize the magnetic properties of the constituent magnetic materials, which include permeability, density, resistivity, core loss density, saturation magnetization value, fluidity, sintering temperature, and others. Compared to altering the nature of solid magnetic materials to reduce space constraints, modifying the magnetic composite is preferred. The most popular candidates for use in magnetic composites are magnetic powders and polymer composites. In particular, when metal alloys are chosen as magnetic powders they have high initial permeability, high saturation magnetization values, but low electrical resistivity. Since polymers can serve as insulation materials, mixing metal alloys with polymers will increase electrical resistivity. The most common metal alloy used is nickel-iron (permalloy) and Metglas. Since existing modeling methods are limited in (a) that multiphasic composites cannot be utilized and (b) the volume fraction of magnetic particles must be low, this investigation was designed to utilize FE (finite element) simulation to analyze how magnetic properties change with the distribution of permalloy powder or Metglas flakes in composites. The primary magnetic properties of interest in this study are permeability and core loss density. Furthermore two kinds of magnetic composites were utilized in this investigation: a benzocyclobutene (BCB) matrix-permalloy and a benzocyclobutene (BCB) matrix-permalloy-based amorphous alloy (Metglas 2705M) material. In our FE simulations, a BCB matrix-permalloy composite was utilized in a body-centered cubic model with half-diameter smaller particles serving as padding. The composite was placed in a uniform magnetic field surrounded by a material whose relative permeability was equal to zero in simulation. In comparison to experimental results, our model was able to predict permeability of composites with volume fraction higher than 52%. It must be noted, however, that although our model was able to predict permeability with only 10% off, it was less effective with respect to core loss density findings. The FE model also showed that permeability will increase with an increasing volume fraction of magnetic particles in the composite. To modify the properties of the composite material, the model of the BCB matrix-permalloy-Metglas composite followed model simulations up to the point at which flakes were inserted in BCB matrix-permalloy composite. The thickness of flakes was found to be an important factor in influencing resulting magnetic properties. Specifically, when the thickness of flakes decreased to quarter size at the same volume fraction, the permeability increased by 15%, while core loss density decreased to a quarter of the original value. The analysis described herein of the important relationship between magnetic properties and the composites is expected to aid in the development and design of new magnetic composite materials.
Master of Science
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8

Hands, Philip James Walton. "Vapour sensing applications and electrical conduction mechanisms of a novel metal-polymer composite." Thesis, Durham University, 2003. http://etheses.dur.ac.uk/4084/.

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A novel metal-polymer composite is presented, comprised of a micron-sized nickel powder dispersed within a silicone polymer matrix. The composite is intrinsically electrically insulating, but displays a dramatic increase in conductivity under compression, tension and torsion. The electrical response to applied compression is characterised. Combined with electron microscopy, the large sensitivity to compression is shown to be due to the uniquely spiky morphology of the filler particles. Low mechanical energy mixing techniques are essential for retaining these sharp tips. In addition, wetting of the nickel particles by the silicone polymer is highly effective, resulting in negligible inter-particle contact between metallic grains even at very high loadings and compressions. Current-voltage characteristics are highly non-linear, displaying peaks, hysteresis, negative differential resistance, trap-filling and radio frequency emission. Evidence points towards an inter-particle conduction mechanism dominated by field emission and Fowler-Nordheim tunnelling, made possible by localised field enhancements at the sharp tips. A novel mechanism of grain charging and the 'pinching-off of conduction pathways is also suggested. Granular forms of the composite display dramatic increases in resistance when exposed to organic solvent vapours, transduced by a polymer swelling mechanism. Responses are dependent upon vapour concentration, and differential responses are obtained with other polymers, indicating excellent potential for applications in artificial olfactory devices (electronic noses). Polymer-solvent interactions follow both Fickian and anomalous diffusion characteristics, and follow basic trends predicted by solubility parameters.
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9

Jadhav, Niteen. "Novel Conducting Polymer Containing Composite Coatings for the Corrosion Protection of Metal Alloys." Diss., North Dakota State University, 2013. https://hdl.handle.net/10365/27037.

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Corrosion is a persistent problem faced by manmade structures made up of metal alloys. Aluminum 2024-T3 is high strength, light weight alloy used in aerospace applications. It suffers from the problem of corrosion due to its composition. Cold rolled steel is employed in structural applications but undergoes severe corrosion when exposed to corrosive conditions. Coatings are one of the best avenues to protect metal alloys from the corrosion. Traditional coating systems such as barrier type coatings, metal rich coatings, and inhibitor containing coatings have their own drawbacks. Conducting polymers (CPs), such as polypyrrole (PPy) can be used for the corrosion protection of the metals. Redox activity in conjunction with corrosion inhibiting ion release ability make CPs as a promising candidate for the replacement for hexavalent chromates. However CPs porous nature, inherent insolubility, stiff chains, and poor mechanical properties pose significant hindrance towards their implementation in coatings. In order to overcome the problems associated with the CPs and to extract maximum functionality out of them, conducting polymer containing composites (CPCC) were developed. CPCC combines CPs with inorganic pigments in unique ways and pave for excellent properties. In this work, series of composites of PPy/Inorganic pigments (aluminum flakes, iron oxide, micaceous iron oxide, and titanium dioxide) were synthesized by ecofriendly, facile chemical oxidative polymerization. Core and shell morphologies of PPy with titanium dioxide and iron oxide were synthesized and employed for the corrosion protection of cold rolled steel substrate. Various dopants such as phosphate, nitrate, molybdate, vanadate, and tungstate were incorporated in the backbone of PPy. These composites were characterized for morphology, elemental composition, and conductivity by various techniques. Furthermore coatings based on these composite pigments were formulated on Aluminum 2024-T3 and cold rolled steel substrates. These coatings were exposed to salt spray and prohesion test conditions and electrochemically evaluated against corrosion by Electrochemical Impedance Spectroscopy (EIS), DC Polarization, galvanic coupling and Scanning Vibrating Electrode Technique (SVET). Effect of solvent in the composite synthesis and PPy morphology in the final composite on the protective properties of coating was investigated. Effect of corrosion inhibiting anions on the final performance properties was also evaluated.
U.S. Army Research Laboratory (Grant No. W911NF-09-2-0014, W911NF-10-2-0082, and W911NF-11-2-0027)
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10

Seo, Geon S. "Time evolution of current and displacement of ion-exchange polymer/metal composite actuators." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280748.

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This dissertation describes the development of a coupled model for the analysis of a novel polymer/metal composite (IPMC) actuator under large external voltage. A general continuum model describing the transport and deformation processes of solid polymer electrolyte is proposed. The formulation is based on global integral postulates for the mass conservation, charge conservation, momentum equilibrium, the first law of thermodynamics, and the second law of thermodynamics. The global equations are localized in the volume and on the material surfaces bounding the polymer. The model is simplified to a three-component system comprised of a fixed negatively charged polymeric matrix, protons, and free water molecules within the polymer matrix. Among these species, water molecules are considered as the dominant specie responsible for the deformation of the IPMC actuators. In this work, the electrochemical process occurring at both electrodes is analyzed as boundary conditions during the deformation of actuator in the regime of large voltage (over 1.2 V). These are used in the framework of overpotential theory to develop boundary conditions for the water transport in the bulk of polymer. The proposed coupled model successfully captures the stress relaxation phenomenon due to water redistribution governed by diffusion. The fabrication process are described, and experiments including the role of initial water content on the electro-mechanical response of the actuator are also discussed. Comparison of simulations and experimental data showed good agreement.
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Книги з теми "Polymer Metal Composite"

1

International Conference on Composite Interfaces (2nd 1988 Cleveland, Ohio). Interfaces in polymer, ceramic and metal matrix composites. Edited by Ishida Hatsuo. London: Elsevier, 1988.

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2

T, Serafini Tito, DiCarlo James A, and Lewis Research Center, eds. Polymer, metal, and ceramic matrix composites for advanced aircraft engine applications. [Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1985.

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3

Hatsuo, Ishida, ed. Interfaces in polymer, ceramic, and metal matrix composites: Proceedings of the Second International Conference on Composite Interfaces (ICCI-II) held June 13-17, 1988, in Cleveland, Ohio, USA. New York: Elsevier, 1988.

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4

Nanocomposite structures and dispersions: Science and nanotechnology--fundamental principles and colloidal particles. Amsterdam: Elsevier, 2006.

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5

Delmonte, John. Metal/Polymer Composites. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-1446-2.

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6

Metal/polymer composites. New York: Van Nostrand Reinhold, 1990.

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7

Luigi, Nicolais, and Carotenuto Gianfranco, eds. Metal-polymer nanocomposites. Hoboken, N.J: Wiley-Interscience, 2005.

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8

Bhattacharya, Srijan. Ionic Polymer–Metal Composites. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003204664.

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9

Y, Rajapakse, Vinson Jack R. 1929-, American Society of Mechanical Engineers. Aerospace Division., and International Mechanical Engineering Congress and Exposition (1995 : San Francisco, Calif.), eds. High strain rate effects on polymer, metal and ceramic matrix composites and other advanced materials: Presented at the 1995 ASME International Mechanical Engineering Congress and Exposition, November 12-17, 1995, San Francisco, California. New York: American Society of Mechanical Engineers, 1995.

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10

L, Mykkanen Donald, ed. Metal and polymer matrix composites. Park Ridge, N.J., U.S.A: Noyes Data Corp., 1987.

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Частини книг з теми "Polymer Metal Composite"

1

Akhtar, Syed Nadeem, Jayesh Cherusseri, J. Ramkumar, and Kamal K. Kar. "Ionic Polymer Metal Composites." In Composite Materials, 223–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49514-8_7.

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2

Biswal, Dillip Kumar. "Ionic Polymer–Metal Composite Actuators." In Ionic Polymer–Metal Composites, 17–30. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003204664-2.

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3

Camanho, Pedro P., and Giuseppe Catalanotti. "Mechanical Fastening of Composite and Composite-Metal Structures." In Joining of Polymer-Metal Hybrid Structures, 187–202. Hoboken, NJ: John Wiley & Sons, Inc, 2017. http://dx.doi.org/10.1002/9781119429807.ch7.

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4

Gendron, David. "Conducting Polymer Based Ionic Polymer Metal Composite Actuators." In Ionic Polymer Metal Composites for Sensors and Actuators, 35–52. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13728-1_3.

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5

Kireitseu, M. V., and L. V. Bochkareva. "Metal-Polymer-Ceramic Nano/Composite Material." In Experimental Analysis of Nano and Engineering Materials and Structures, 35–36. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_16.

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6

Khan, Siladitya, Gautam Gare, Ritwik Chattaraj, Srijan Bhattacharya, Bikash Bepari, and Subhasis Bhaumik. "Inverse Kinematic Modeling of Bending Response of Ionic Polymer Metal Composite Actuators." In Ionic Polymer–Metal Composites, 95–121. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003204664-5.

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7

Panin, Sergey V., Lyudmila A. Kornienko, Nguyen Duc Anh, Vladislav O. Alexenko, Dmitry G. Buslovich, and Svetlana A. Bochkareva. "Three-Component Wear-Resistant PEEK-Based Composites Filled with PTFE and MoS2: Composition Optimization, Structure Homogenization, and Self-lubricating Effect." In Springer Tracts in Mechanical Engineering, 275–99. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_13.

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AbstractThe aim of this work was to design and optimize compositions of three-component composites based on polyetheretherketone (PEEK) with enhanced tribological and mechanical properties. Initially, two-component PEEK-based composites loaded with molybdenum disulfide (MoS2) and polytetrafluoroethylene (PTFE) were investigated. It was shown that an increase in dry friction mode tribological characteristics in metal-polymer and ceramic-polymer tribological contacts was attained by loading with lubricant fluoroplastic particles. In addition, molybdenum disulfide homogenized permolecular structure and improved matrix strength properties. After that, a methodology for identifying composition of multicomponent PEEK-based composites having prescribed properties which based on a limited amount of experimental data was proposed and implemented. It was shown that wear rate of the “PEEK + 10% PTFE + 0.5% MoS2” composite decreased by 39 times when tested on the metal counterpart, and 15 times on the ceramic one compared with neat PEEK. However, in absolute terms, wear rate of the three-component composite on the metal counterpart was 1.5 times higher than on the ceramic one. A three-fold increase in wear resistance during friction on both the metal and ceramic counterparts was achieved for the “PEEK + 10% PTFE + 0.5% MoS2” three-component composite compared with the “PEEK + 10% PTFE”. Simultaneous loading with two types of fillers slightly deteriorated the polymer composite structure compared with neat PEEK. However, wear rate was many times reduced due to facilitation of transfer film formation. For this reason, there was no microabrasive wear on both metal and ceramic counterpart surfaces.
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8

Jain, Ravi Kant. "Application of Ionic Polymer Metal Composite (IPMC) as Soft Actuators in Robotics and Bio-Mimetics." In Ionic Polymer–Metal Composites, 53–94. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003204664-4.

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9

Popa, A., A. Filimon, and L. Lupa. "Polysaccharide-Based Ionic Polymer Metal Composite Actuators." In Ionic Polymer Metal Composites for Sensors and Actuators, 19–34. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13728-1_2.

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10

Didi, Mirja, and Peter Mitschang. "Induction Welding of Metal/Composite Hybrid Structures." In Joining of Polymer-Metal Hybrid Structures, 101–25. Hoboken, NJ: John Wiley & Sons, Inc, 2017. http://dx.doi.org/10.1002/9781119429807.ch4.

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Тези доповідей конференцій з теми "Polymer Metal Composite"

1

Mishra, S. R., K. Ghosh, J. Losby, T. Kehl, and A. Viano. "Half-metal-polymer magnetoresistive composite." In INTERMAG Asia 2005: Digest of the IEEE International Magnetics Conference. IEEE, 2005. http://dx.doi.org/10.1109/intmag.2005.1464156.

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2

Shahinpoor, Mohsen. "Electrically Controllable Deformations in Ionic Polymer Metal Composite Actuators." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39037.

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Ionic polymer metal composites (IPMC’s) exhibit spectacular coupling between electrical and mechanical domains. Sensing and actuation properties of these materials and the force and displacement characteristics have been investigated as a means of determining the electromechanical coupling coefficients of the material. An electric field applied across the thickness of the polymer causes electrophoretic ionic migration within the material. Electro-osmotic drag induces solvent migration in addition to the ion motion, and a stress is generated within the material causing the material to deform. This phenomenon is also reversible, making it possible to use ionic polymer materials as sensors, transducers and power generators. The salient feature of ionic polymeric materials, as compared to other electromechanical transducers such as piezoelectrics, is the large deformations that are achievable with low electric fields. Cantilever samples of ionic polymer material exhibit tip displacements on the order of their length with applied electric fields of the order of 10 volts per mm. Recent measurements of the motion of cantilever samples of ionic polymers have demonstrated a controllable, repeatable deformation in which the zero force position of the ionic polymer changes depending on the amplitude of the applied electric field. This effect appears to be controllable in the sense that the change in the zero force position of the polymer is a function of the amplitude of the applied electric field. It is also reversible to a degree because a step change in the voltage with the opposite polarity will change the shape of the ionic polymer strip back to a position that is close to the original position before cycling of the material. Thus, there is a potential to use this effect as a deformation memory mechanism within the polymer material. These observations and subsequent interpretations are reported in this presentation.
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3

Kim, Doyeon, and Kwang J. Kim. "Electrochemistry of ionic polymer-metal composite." In Smart Structures and Materials, edited by Yoseph Bar-Cohen. SPIE, 2005. http://dx.doi.org/10.1117/12.592054.

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4

Szostak, Marek, and Jacek Andrzejewski. "Thermal Properties of Polymer-Metal Composites." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20506.

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The objectives in this paper are to investigate the effects of the filler content and size on the effective thermal conductivity of the PE/Al; PE/Cu, PE/Fe and PE/bronze composites. The polymer matrix of the polymer/metal composites was two types of polyethylenes: LDPE and HDPE (from Basell Orlen). The following polymer/metal composites obtained by extrusion process containing: 10% by weight of Al, Cu, Fe and bronze powder in LDPE matrix and composites containing 5, 10, 15 and 20% by weight of Al flakes in HDPE polymer were prepared and tested. Adding in the extrusion process 10% by weight of bronze powder into the polyethylene, increased more than five times the thermal diffusivity of produced composite. Use as a filler 20% wt. of aluminum flake increases it by more than twice. The study showed the ability to produce polyethylene matrix composites with the addition of metal powder fillers (Al, Cu, Fe, and bronze). Analyzing the measuring results of thermal diffusivity coefficient by Angstrom method, it can be concluded that with the appropriate filler content, the particles are located close enough to each other to form a continuous conductive path, then the thermal diffusivity of the composite increases significantly.
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5

Kawakita, Jin, and Toyohiro Chikyow. "Conductive polymer/metal composite for flexible interconnect." In 2016 International Conference on IC Design and Technology (ICICDT). IEEE, 2016. http://dx.doi.org/10.1109/icicdt.2016.7542053.

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6

Fajstavr, D., P. Slepicka, and V. Svorcik. "Preparation of Composite Periodic Metal-Polymer Nanostructures." In 2018 IEEE 18th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2018. http://dx.doi.org/10.1109/nano.2018.8626339.

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7

Pudipeddi, Arun, Doyeon Kim, and Kwang J. Kim. "Sensory behavior of ionic polymer metal composite." In Smart Structures and Materials, edited by Yoseph Bar-Cohen. SPIE, 2006. http://dx.doi.org/10.1117/12.654993.

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8

Mishra, S. R., J. Losby, and K. Ghosh. "Transport Properties of Half-metal-Polymer Composite." In INTERMAG 2006 - IEEE International Magnetics Conference. IEEE, 2006. http://dx.doi.org/10.1109/intmag.2006.376107.

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9

Arumugam, Jayavel, and Arun Srinivasa. "Thermodynamic Modeling of Ionic Polymer-Metal Composite Beams." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8149.

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A thermodynamically consistent model to simulate the electromechanical response of ionic polymer-metal composite (IPMC) beams has been developed based on Euler-Bernoulli beam theory. Appropriate assumptions have been made and suitable forms for the Helmholtz free energy and the rate of dissipation have been chosen. The governing equations, describing the actuation and sensing behavior of IPMC strips in air, have been formulated using a set of kinematic assumptions, the power theorem, and the maximum rate of dissipation hypothesis, neglecting inertial effects. The model has been extended to solve for large deformations in IPMC cantilevers with certain loading conditions. The model has been shown to simulate the electromechanical responses of both Nafion and Flemion based IPMC strips. This includes the initial overshoot followed by a gradual back-relaxation observed in the tip deflection measurements of Nafion based IPMC strips under the application of a step voltage. It has been shown that a coupled convective heating term in the rate of dissipation function is crucial for simulating this overshoot and the back relaxation.
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Dai, Lijun, Yujun Zhang, Haoran Zhou, Lei Li, and Hongwei Duan. "Preparation of a New Ionic Polymer-metal Composite." In 2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2007. http://dx.doi.org/10.1109/nems.2007.352102.

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Звіти організацій з теми "Polymer Metal Composite"

1

Newton, Crystal H. Implementation of the Military Handbook 17 for Polymer Matrix Composites and Metal Matrix Composites. Fort Belvoir, VA: Defense Technical Information Center, April 1994. http://dx.doi.org/10.21236/ada278795.

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2

Newton, Crystal H. Implementation of the Military Handbook 17 for Polymer Matrix Composites and Metal Matrix Composites. Fort Belvoir, VA: Defense Technical Information Center, October 1994. http://dx.doi.org/10.21236/ada285629.

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3

Newton, Crystal H. Implementation of the Military Handbook 17 for Polymer Matrix Composites and Metal Matrix Composites. Fort Belvoir, VA: Defense Technical Information Center, October 1994. http://dx.doi.org/10.21236/ada285772.

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4

Newton, Crystal H. Briefing/Review Meeting, Implementation of the Military Handbook 17 for Polymer Matrix Composites and Metal Matrix Composites. Fort Belvoir, VA: Defense Technical Information Center, March 1994. http://dx.doi.org/10.21236/ada277446.

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5

Newton, Crystal H. Briefing/Review Meeting Implementation of the Military Handbook 17 for Polymer Matrix Composites and Metal Matrix Composites. Fort Belvoir, VA: Defense Technical Information Center, January 1995. http://dx.doi.org/10.21236/ada290769.

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6

Shriver, D. F., and M. A. Ratner. Mixed ionic-electronic conduction and percolation in polymer electrolyte metal oxide composites. Final report. Office of Scientific and Technical Information (OSTI), June 1997. http://dx.doi.org/10.2172/491618.

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