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Showing 1 to 20 of 30 for “"polypyrrole (PPy)"”.
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A Polypyrrole/Sulfonated Calixarene Modified Electrode for the Electochemical Detection of Dopamine
… of a p-sulfonatocalix[4]arene (C4S) doped polypyrrole (PPy-C4S)modified electrode for the electrochemical detection ofdopamine (DA) is reported. the physical and electrochemical characteristics of the PPy-C4S film are discussed, the oxidation of DA and the PPy-C4S modified electrode is …
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A Characterization of Caffeine Imprinted Polypyrrole Electrode
… Conductive polymers, (CPs) such as polypyrrole, can be likened to semiconductors because of small band gaps and low electronic mobility. CPs are exploited as an excellent tool for the preparation of nanocomposites with nano scaled biomolecules. Polypyrrole (Ppy) was the first of this …
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Novel polymer constructs for controlled release and presentation of topographic cues in support of neuronal cells
… with an electrically conductive polymer, polypyrrole (PPy), will be used as a substrate to enhance nerve cell interaction in vitro. The polymer will be analyzed for the capacity to influence cellular phenotype, including via controlled biomolecular delivery and surface topography. This …
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Electrodeposition of conducting polymer fibers
… such as flexibility of traditional polymers. Polypyrrole (PPy) is one of the more commonly studied electrically conducting polymers due to its high conductivity and stability in ambient conditions. A one step electrochemical process for growing macroscopic conducting polymer fibers previously …
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Preparation and Application of Conducting Polymer-Carbon Nanotube Composite.
… work, we have used carbon nanotubes (CNTs) and polypyrrole (PPy) conducting polymers (CPs) as models to make a nanotube and conducting polymer composite material. Under electro-oxidation condition, the PPy/CNT films can be grown on conventional substrates such as a glassy carbon electrode in …
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Modeling, identification, and application of multilayer polypyrrole conducting polymer actuators
… available, self-contained, multilayer polypyrrole (PPy) actuators to develop low-order lumped parameter models of actuator electrical, mechanical, and electromechanical behavior. Experimental data were processed using system identification techniques. Both grey box and black box models …
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Tunable wettability of microstructured polypyrrole films
… the development of the conducting polymer polypyrrole as a viable material for applications requiring switchable wettability. A fabrication procedure that produces robust microstructured polypyrrole (PPy) that quickly and reversibly switches between the superhydrophobic and superhydrophilic …
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Conducting polymers for electrochemically mediated separations
… based on an intrinsically conducting polymer, polypyrrole (PPy), doped with anionic surfactant dioctylsulfosuccinate (AOT), denoted PPy(AOT), is developed for mitigating organic pollutants in wastewater. Highly porous PPy(AOT) can be synthesized using a facile electropolymerization protocol, …
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Polypyrrole modified with sulfonated beta-cyclodextrin: Controlled release of DA and host-guest complexation properties
… the synthesis and characterisation of conducting polypyrrole [PPy] films, deposited in the presence of various electroytes, predominantly, a large anionic cyclodextrin [SB-CD]. The presence of the SB-CD dopant was confirmed using SEM/EDAX. It was shown that the SB-CD-doped PPy films have cation …
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Novel polypyrrole derivatives to enhance conductive polymer-tissue interactions
… of interacting in biological environments. Polypyrrole (PPy) is a conducting polymer that is a promising biomaterial for drug delivery and sensing applications. Because PPy is a polymer that can be made in degradable forms and because it can be stimulated electrically, it is an interactive …
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Polypyrrole-containing Composite Particles: Preparation, Characterization and Application
This research is focused on preparation of polypyrrole (PPy) composite particles by using socalled template oxidative polymerization method. As a template, water-soluble polymers, polymeric microgels, latex particles or bulk gels can be used. The morphology and properties of the composite particles …
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Large contraction conducting polymer molecular actuators
… polymer actuators. The first strategy utilizes polypyrrole (PPy), a conducting polymer actuator material that contracts and expands based on a bulk ion swelling mechanism. Optimization of the polymer activation environment via room temperature ionic liquids enables PPy actuators to generate …
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Novel Photothermal Materials and Thermally Engineered Membranes for Solar Desalination
… materials (polydopamine (PDA), MXene and polypyrrole (PPy)) for efficient PMD. Their excellent photothermal property, abundant functional groups and facile processability make them highly appealing in achieving high-performance PMD membranes. Taken together, this work further our …
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Lead - Free Piezoelectric Based Magnetoelectric Composites
… electroactive polymeric actuators in the form of Polypyrrole (PPy) / Au / Polyvinylidene fluoride (PVDF) / Au / Polypyrrole (PPy) were synthesized and the process flow was optimized. Pore size and thickness of PVDF layer was adjusted by changing the solvent, viscosity and drying temperature. …
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Polypyrrole Modified with Macrocycles for the Detection of Aqueous Pollutants and Carbon Membranes for the Separation of Gases
… The formation and detailed characterisation of a polypyrrole (PPy) film modified with anionic macrocycles of either sulfonated-bcyclodextrin (sul-bCD) or sulfonated-calix[4]arene (sul-calix[4]) were carried out. These composite modified electrodes were used as electrochemical sensors for the …
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Polypyrrole modified with sulfated β-cyclodextrin: characterization and application in the sensing of viologens
In this thesis a conducting polypyrrole (ppy) matrix doped with the anionic sulfated β-cyclodextrin (sβ-CD) was electrosynthesized and characterized. This modified polymer, ppysβ-CD, was used as a sensor for the detection of three compounds, methyl, ethyl and benzyl viologen. Methyl viologen is …
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A Selectivity Study on the Use of Caffeine and Theobromine Imprinted Polypyrrole Surface Electrodes
… nano-structured biologically selective systems. Polypyrrole (Ppy) is one such CP that is extensively used for the construction of bioanalytical sensors. Ppy has shown great promise primarily due to its biocompatibility and thermal stability under a variety of environmental conditions. In this …
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Synthesis and Characterization of Polymer Composite Materials For Lithium Battery Cathodes and Capacitors
… based on silver vanadium oxide (SVO) coated with polypyrrole (PPy) having lower particle-to-particle resistance, lower initial voltage drop, higher discharge capacity and higher rate-capability than state-of-the-art SVO. PPy/SVO composite cathode materials were synthesized by polymerizing pyrrole …
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Visible Light Photocatalytic MoO3-Based Nanomaterials Synthesis, the Effect of Polymer Coatings on Their Photocatalytic Activity and Dissolution, and Their Applications in Water Treatment
… treatment. Hence, conductive polymers such as polypyrrole (PPy) and polyaniline (PANI) were studied as coatings for magnetic MoO3 to determine their effect on material dissolution and photocatalytic activity. In addition, to provide insight on the effects of the base nanomaterial on the …
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Development of a Novel Drug Delivery System Based on Conducting Polymers
… A novel drug delivery system, based on the ICP polypyrrole (PPy), has been developed to provide for the controlled release of risperidone. Due to the inherent properties of ICPs, electrical stimulation can be used to alter the redox state of PPy, which in turn can modify the release rate of …
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