7 June 2000 Polyelectrolyte gels in electric fields: a theoretical and experimental approach
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Abstract
In order to gain more insight into basic principles of the nature of polymer hydrogels which are able to execute work by large deformations in electric fields, this study is mainly focused on those gels with a polyacrylamide backbone being very suitable for considerably varying their physicochemical properties simply by specific copolymerization. In the experimental part, the Donnan potential has been registered for the first time in PAAm/PAA gels in varying electric fields and different chemical environments with a new microelectrode technique. The mechanical properties of the gels have been characterized by measurements of swelling ratio, elastic modulus and being in dynamics under various stimuli. In the theoretical part, a model based both on this theory and the measured mechanical parameters, the bending dynamics of a polyelectrolyte gel in an electric field can be evaluated. Numerical simulations employing finite element discretization demonstrate the potential and the validity of the model. A promising correlation between theory and experiment could be shown.
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Rainer W. Guelch, Jens Holdenried, Andrea Weible, Thomas Wallmersperger, Bernd Kroeplin, "Polyelectrolyte gels in electric fields: a theoretical and experimental approach", Proc. SPIE 3987, Smart Structures and Materials 2000: Electroactive Polymer Actuators and Devices (EAPAD), (7 June 2000); doi: 10.1117/12.387778; https://doi.org/10.1117/12.387778
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