Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"active polymers"”.
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Mechanics of magneto-active polymers
<p>Magneto-active polymers (MAPs) are polymer-based composites that respond to magnetic fields with large deformation or tunable mechanical properties. While a variety of these materials exist, most are composites of a soft polymer matrix with a filler of magnetic particles. The multi-physics …
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Constitutive modeling of active polymers
… a three-dimensional constitutive model of active polymeric materials, including changes in material volume and properties due to actuation. Active polymers reversibly change shape, volume and/or material properties in response to some external stimulus. Electric fields are a common driving …
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Probing the electrochemical dynamics of soluble redox active polymers
… allow fast ion transport while minimizing redox active species crossover between anolyte (negative electrolyte) and catholyte (positive electrolyte) compartments. This pervasive crossover leads to deleterious capacity fade and materials underutilization. Redox active polymers (RAPs) are …
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Design of flexible actuators using electro-active polymers and CPG-based control strategies
… and require-ments for using dielectric electroactive polymers (EAP) for designing of exible actuators and manipulators. A model-guided approach to design a bio-inspired exible actuator mod-ule is presented analyzed. Further, mathematical modelling for Central Pattern Generators (CPGs) is …
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Systematic study of redox-active polymers for energy storage: Exploring structural modulation, electrolyte interactions and programmable degradation
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Design and testing of fiber-constrained electroactive polymer
Soft robotics take advantage of active materials to regenerate many complex motions, including low-force functions, such as camouflage, micro-grabbing, or agile locomotion of micro robot. For these applications, traditional actuators, like electric motors and combustion engines, are unnecessarily …
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Optimization of Quinone-Based, Extracellular Electron Transfer Mediators for Bioelectronic Applications
… of EET is mediated by diffusible, redox-active small molecules, or electron shutting compounds (ESCs). Quinones, a class of cyclic, conjugated, di-keto compounds often serve as ESCs. Lactiplantibacillus plantarum, a commensal lactic acid bacterium, can utilize quinoline-mediated EET …
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Feasibility study in using intelligent-materials to create actuators with muscle capabilities that can enhance prosthetics
… various materials; shape memory alloys, electro active polymers, piezoelectric ceramics and carbon nanotubes. A product design specification that described the material's fulfillment of specified design requirements was used to select one of the materials for further development. Actuators that …
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Direct visualization of electron transport among nonconjugated polymeric redox-active colloids via fluorescence microscopy
… electrical conduction in nonconjugated/redox active polymers has been explored only less than a decade, yet it is already showing promise as the basis for conductivities and charge transport (CT) distances relative to well-studied conjugated polymers. My Ph.D. research has been devoted to …
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Soluble redox active macromolecular architectures and their electrochemical analysis for energy storage applications
Organic redox-active materials offer advantages of material tunability while maintaining high performance for next-generation energy storage and conversion solutions. Macromolecular architectures such as oligomers, polymers, and colloids have recently gained interest for their size-exclusion …
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Electrochemical mechanisms in nano-structured graphitic and redox-active polymeric architectures
… last part of this dissertation introduces redox-active polymers and advanced redox-active colloids as electrochemical energy storage carriers, which have shown facile charge transfer kinetics and good charge storage ability. Combining these macromolecular electrolytes with size-exclusion porous …
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Modeling, simulation, and control of a polypyrrole-based conducting polymer actuator
… model was developed for an ionic electro-active polymer (EAP) actuator. The electrical and chemical domains of the system were modeled using a simple electrical circuit. Ionic charge storage within the polymer was described using a linear reticulated model. This model improves upon the …
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The Development of a New Cloning Strategy for the Biosynthetic Production of Brush-Forming Poly(Amino Acids)
The design and discovery of new surface-active polymers that self-assemble on solid substrates to form brush layers will have a major impact on numerous applications. Through recombinant DNA technology, there exists the potential to harness a cell's protein synthesis machinery to produce a …
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Photoelectrochemical tandem cells with enzymes wired to hierarchically-structured electrodes for solar fuel synthesis
… combined the efficient wiring afforded by redox-active polymers with the high loading provided by hierarchically-structured inverse opal indium tin oxide (IO-ITO) electrodes. A fully-integrated host−guest system showed a substantially improved wiring of PSII to the IO-ITO electrode with an Os …
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Nonlinear Electromechanical Deformation of Isotropic and Anisotropic Electro-Elastic Materials
Electro-active polymers (EAPs) have emerged as a new class of active materials, which produce large deformations in response to an electric stimulus. EAPs have attractive characteristics of being lightweight, inexpensive, stretchable, and flexible. Additionally, EAPs are conformable, and their …
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Mechanisms of diffusive charge transport in redox active polymer solutions
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Structure-property-processing relationships between polymeric solutions and additive manufacturing for biomedical applications
… manufacturing (AM) creates 3D objects out of polymers, ceramics, and metals to enable cost-efficient and rapid production of products from aerospace to biomedical applications. Personalized products manufactured using AM, such as personalized dosage pharmaceuticals, tissue scaffolds, and …
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Mechanochemical activation at solid interfaces
… characterized with laser-induced stress waves. Active specimens with MA mechanophore covalently bonded at the fused silica and epoxy interface were successfully fabricated. Fluorescence microscopy, X-ray Photoelectron Spectroscopy (XPS), and Time of Flight Secondary Ion Mass Spectroscopy …
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Revealing ion transfer kinetics and charge dynamics at operating battery materials through scanning electrochemical microscopy
… flow batteries (RFBs), large, dispersible redox active polymers (RAPs) and colloids (RACs) accept millions of electrons while simultaneously exchanging an equal number of ions with the electrolyte. This charge transfer process occurs at the interface of a current collector involving material …
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