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您的检索式：作者名="David Pugal"
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| 1 | Improving electromechanical output of IPMC by high surface area Pd-Pt electrodes and tailored ionomer membrane thickness显示文摘In this study,we attempt to improve the electromechanical performance of ionic polymer–metal composites(IPMCs)by developing high surface area Pd-Pt electrodes and tailoring the ionomer membrane thickness.With proper electroless plating techniques,a high dispersion of palladium particles is achieved deep in the ionomer membrane,thereby increasing notably the interfacial surface area of electrodes.The membrane thickness is increased using 0.5 and 1 mm thick ionomer films.For comparison,IPMCs with the same ionomer membranes,but conventional Pt electrodes,are also prepared and studied.The electromechanical,mechanoelectrical,electrochemical and mechanical properties of different IPMCs are characterized and discussed.Scanning electron microscopy-energy dispersive X-ray(SEM-EDS)is used to investigate the distribution of deposited electrode metals in the cross section of Pd-Pt IPMCs.Our experiments demonstrate that IPMCs assembled with millimeter thick ionomer membranes and newly developed Pd-Pt electrodes are superior in mechanoelectrical transduction,and show significantly higher blocking force compared to conventional type of IPMCs.The blocking forces of more than 0.3 N were measured at 4V DC input,exceeding the force output of typical Nafion®117-based Pt IPMCs more than two orders of magnitude.The newly designed Pd-Pt IPMCs can be useful in more demanding applications,e.g.,in biomimetic underwater robotics,where high stress and drag forces are encountered. | Viljar Palmre Seong Jun Kim David Pugal Kwang Kim | 2014 | International Journal of Smart and Nano Materials2014，5，2： | 1 |
| 2 | Modeling Ionic Polymer-Metal Composites with Space-Time Adaptive Multimesh hp-FEM显示文摘We are concerned with a model of ionic polymer-metal composite(IPMC)materials that consists of a coupled system of the Poisson and Nernst-Planck equations,discretized by means of the finite element method(FEM).We show that due to the transient character of the problem it is efficient to use adaptive algorithms that are capable of changing the mesh dynamically in time.We also show that due to large qualitative and quantitative differences between the two solution components,it is efficient to approximate them on different meshes using a novel adaptive multimesh hp-FEM.The study is accompanied with numerous computations and comparisons of the adaptive multimesh hp-FEMwith several other adaptive FEM algorithms. | David Pugal Pavel Solin Kwang J.Kim Alvo Aabloo | 2012 | Communications in Computational Physics2012，11，1： | 0 |
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