The effect of deposition electrolyte on polypyrrole surface interaction with biological environment

Mindroiu, Mihaela; Ungureanu, Camelia; Ion, Raluca; Pîrvu, Cristian

doi:10.1016/j.apsusc.2013.03.107

Cited by 33 publications

(23 citation statements)

References 42 publications

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“…For our purposes, the wettability of the polymer surfaces could be controlled by using an appropriate dopant and the redox state conditions [21,22,68]. Roughness is described as the typical height variation on the surface.…”

Section: Discussionmentioning

confidence: 99%

“…Surface properties of these very well studied polymers can be effectively controlled and reproduced by controlling the polymerisation conditions as well as by using appropriate counter ions. The use of various types of dopants in combination with different polymerisation conditions influences polymer surface properties like thickness, roughness, conductivity and hydrophobicity [20][21][22] and has been shown to influence cell viability [18].…”

Section: Introductionmentioning

confidence: 99%

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Tunable conjugated polymers for bacterial differentiation

Golabi

Turner

Jager

2016

Sensors and Actuators B: Chemical

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A novel rapid method for bacterial differentiation is explored based on the specific adhesion pattern of bacterial strains to tunable polymer surfaces. Different types of counter ions were used to electrochemically fabricate dissimilar polypyrrole (PPy) films with diverse physicochemical properties such as hydrophobicity, thickness and roughness. These were then modulated into three different oxidation states in each case. The dissimilar sets of conducting polymers were Principal Component Analysis showed that each strain of bacteria had its own specific adhesion pattern. Hence, they could be discriminated by this simple, label-free method. , based on tunable polymer arrays combined with pattern recognition.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable conjugated polymers for bacterial differentiation

Golabi

Turner

Jager

2016

Sensors and Actuators B: Chemical

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“…Lignin, a complex, amorphous organic polymer found in plant tissues, exhibits antibacterial activity against S. aureus, P. aeruginosa and C. famata 51) . Polypyrrole-coated titanium surfaces exhibit a three-fold greater repellent effect than a common TiAl 6V alloy against E.coli and S. aureus 104) . A copolymer coating of 4-vinyl-N-hexylpyridinium bromide and dimethyl (2-methacryloyloxyethyl) phosphonate (VP:DMMEP 30:70) reduces the bacterial load of S. aureus and S. epidermidis by up to 90% compared to titanium 162) .…”

Section: Polymeric Coatingsmentioning

confidence: 99%

“…Lignin, PEG, and silicon-doped surfaces exhibit improved osteoconductive characteristics, with high adhesion rates for epithelial and osteoblastic cells 51,97,101) . However, polypyrrole surfaces reduce cell proliferation and adhesion of eukaryotic cells 104) .…”

Section: Polymeric Coatingsmentioning

confidence: 99%

Antimicrobial dental implant functionalization strategies —A systematic review

Grischke

Eberhard

Stiesch

2016

Dental Materials Journal

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“…Como se puede ver, PPy 1 presenta una adherencia 10 veces mayor que la película formada a pH neutro. Se han reportado valores de fuerza de adherencia de hasta 1,54 MPa para PPy formado a partir de soluciones orgánicas [16] y de hasta 2,07 MPa [17] para PPy dopado con inhibidores de la corrosión. Se puede concluir que la muestra PPy 1 presenta buena adherencia.…”

Section: Caracterización De Las Películas De Ppyunclassified

Formación electroquímica de películas de polipirrol sobre Nitinol a partir de soluciones de ácido sulfosuccínico

2018

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RESUMENEn este trabajo se estudió la electrosíntesis de polipirrol (PPy) sobre Nitinol a partir de soluciones de ácido sulfosuccínico (0,25 M) y pirrol (0,25 M). El PPy fue formado potenciostáticamente en soluciones de pH 1 y 7. Hasta donde tenemos conocimiento, es la primera vez que se realiza la electrodeposición de PPy en presencia de ácido sulfosuccinico.La morfología de las películas se estudió mediante imágenes de microscopia de barrido electrónico, observándose la típica forma globular del PPy. También se determinó, mediante energía dispersiva de rayos X (EDS), la presencia de S lo cual confirma que el dopante fue incorporado a la matriz polimérica. Las pelícu-las formadas son muy adherentes y presentan una conductividad aceptable.Para poder evaluar el comportamiento ante la corrosión se realizaron diferentes experiencias electroquímicas en solución de Ringer: medición del potencial de circuito abierto, diagramas de Tafel y voltametría de barrido lineal. Si bien ambos recubrimientos mejoran la protección del sustrato, las películas formadas en solución de pH 1 ofrecen mejores resultados. El análisis de iones en solución mediante espectrometría de emisión atómica de plasma acoplado inductivo confirma que las películas son protectoras, evitando la liberación de iones Ni en la solución.Palabras clave: Nitinol, Polipirrol, Acido Sulfosuccínico, Adherencia. ABSTRACTIn this work the electrosynthesis of polypyrrole (PPy) on Nitinol from solutions of sulfosuccinic acid (0,25 M) and pyrrole (0,25 M) was studied. The PPy was formed potentiostatically in solutions of pH 1 and 7. As far as we know, this is the first time that the electrodeposition of PPy is carried out in the presence of sulfosuccinic acid.The morphology of the films was studied by scanning electron microscopy images, observing the typical globular shape of PPy. The presence of S was also determined by X-ray dispersive energy (EDX), confirming that the dopant was incorporated into the polymer matrix. The films formed are very adherent and exhibit acceptable conductivity.In order to evaluate the corrosion behaviour, different electrochemical experiments were performed in Ringer's solution: measurement of open circuit potential, Tafel plots and linear sweep voltammetry. While both coatings improve the protection of the substrate, the films formed in pH 1 solution offer better results. The analysis of ions in solution by inductive coupled plasma atomic emission spectrometry confirms that the films are protective, preventing the release of Ni ions into the solution.

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The effect of deposition electrolyte on polypyrrole surface interaction with biological environment

Cited by 33 publications

References 42 publications

Tunable conjugated polymers for bacterial differentiation

Tunable conjugated polymers for bacterial differentiation

Antimicrobial dental implant functionalization strategies —A systematic review

Formación electroquímica de películas de polipirrol sobre Nitinol a partir de soluciones de ácido sulfosuccínico

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