Influence of pre-grafted pyrrole-based silane on the electrodeposition and chemical properties of polypyrrole films

Sougueh, C.M.; Lakard, Sophie; Husson, Jérôme; Contal, Emmanuel; Monney, Sandrine; Moutarlier, Virginie; Magnenet, C.; Lakard, Boris

doi:10.1016/j.synthmet.2018.10.017

Cited by 7 publications

(10 citation statements)

References 47 publications

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“…The TMSP/FTO interface is reached after an erosion time of 2 s meaning that the deposited TMSP layer is very thin. Our results are in accordance with those previously described …”

Section: Resultssupporting

confidence: 94%

Electropolymerization of Pyrrole-Tailed Imidazolium Ionic Liquid for the Elaboration of Antibacterial Surfaces

Halima

Zwingelstein

Humblot

et al. 2023

ACS Appl. Mater. Interfaces

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A strategy was developed to prepare antibacterial surfaces by electropolymerization of a pyrrole-functionalized imidazolium ionic liquid bearing an halometallate anion. The objective was to combine the antibacterial efficiency of polypyrrole (PPy) with those of the ionic liquid's components (cation and anion). For this, N-(1-methyl-3-octylimidazolium)pyrrole bromide monomer [PyC 8 MIm]Br was synthesized and coordinated to ZnCl 2 affording [PyC 8 MIm]Br-ZnCl 2 . The antibacterial properties of [PyC 8 MIm]Br-ZnCl 2 monomer were evaluated against Escherichia coli and Staphylococcus aureus by measurement of the minimum inhibitory concentration (MIC) values. This monomer presents higher activity against S. aureus (MIC = 0.098 μmol• mL −1 ) than against E. coli (MIC = 2.10 μmol•mL −1 ). Mixtures of pyrrole and the pyrrole-functionalized ionic liquid [PyC 8 MIm]Br-ZnCl 2 were then used for the electrodeposition of PPy films on Fluorine-doped tin oxide (FTO) substrates. The concentration of pyrrole was fixed to 50 mM, while the concentration of [PyC 8 MIm]Br-ZnCl 2 was varied from 5 to 100 mM. The efficient incorporation of the imidazolium cation and zinc halometallate anion into the films was confirmed by X-ray photoelectron spectroscopy (XPS) measurements. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) measurements confirmed the homogeneity of the different films with structures that depend on the [PyC 8 MIm]Br-ZnCl 2 concentration. The films' thickness determined by profilometry varies only slightly with the [PyC 8 MIm]Br-ZnCl 2 concentration from 7.4 μm at 5 mM to 8.9 μM at 100 mM. The films become more hydrophilic with an increase of [PyC 8 MIm]Br-ZnCl 2 concentration with water contact angles varying from 47°at the lowest concentration to 32°at the highest concentration. The antibacterial activities of the different PPy films were determined both by the halo inhibition method and by the colony forming units (CFUs) counting method over time against Gram-positive S. aureus and Gram-negative E. coli bacteria. Films obtained by incorporation of [PyC 8 MIm]Br-ZnCl 2 showed excellent antibacterial properties, at least two times higher than those of neat PPy, validating our strategy. Furthermore, a comparison of the antibacterial properties of the films obtained using the same [PyC 8 MIm]Br-ZnCl 2 concentration (50 mM) evidenced much better activity against Gram-positive (no bacterial survival within 5 min) than against Gram-negative bacteria (no bacterial survival within 3 h). Finally, the antibacterial performances over time could be tuned by the concentration of the employed pyrrolefunctionalized ionic liquid monomer. Against E. coli, using 100 mM of [PyC 8 MIm]Br-ZnCl 2 , the bacteria were totally killed within a few minutes, using 50 mM, they were killed after 2 h while using 10 mM, about 20% of bacteria survived even after 6 h.

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“…The TMSP/FTO interface is reached after an erosion time of 2 s meaning that the deposited TMSP layer is very thin. Our results are in accordance with those previously described …”

Section: Resultssupporting

confidence: 94%

Electropolymerization of Pyrrole-Tailed Imidazolium Ionic Liquid for the Elaboration of Antibacterial Surfaces

Halima

Zwingelstein

Humblot

et al. 2023

ACS Appl. Mater. Interfaces

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“…In another similar work, Sougueh et al 55 obtained PPy films through electrochemical polymerization performed from a solution of acetonitrile containing Py and LiClO 4 . They noted that the PPy films deposited onto silane‐modified FTO surfaces are less rough, flatter, more uniform, more homogeneous, and more hydrophobic compared with those prepared without silane.…”

Section: Synthesis Of Ppymentioning

confidence: 99%

Synthesis and factor affecting on the conductivity of polypyrrole: a short review

Pang

Arsad

Ahmadipour

2020

Polymers for Advanced Techs

166

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Polypyrrole (PPy) has unique features such as easy synthesis, environmental stability, and high electrical conductivity (approximately 105 S/cm and even >380 S/cm) for bulk and thin‐film materials. Thus, PPy is applied in numerous well‐established applications, such as in sensors, supercapacitors, and resonators. These applications take advantage of the unique properties achieved through the structure and properties of PPy. This article comprehensively elaborates the methods used to synthesize conductive PPy, along with the important factors affecting its conductivity. Emphasis is given to versatile and basic approaches that enable control of the microstructural features that eventually determine PPy conductivity. Despite the intensive research in this area, no previous study has presented all possible relevant information about PPy fabrication and the important factors influencing its electrical conductivity.

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“…Thereby, when the PPy/silane composite film was formed on the Mg alloy surface by electrochemical methods, sodium salicylate formed a passive film to reduce the anodic dissolution of the Mg alloy, as the PPy film could be easily deposited by electro-polymerization. During the polymerization progress of PPy/silane film, some of the silane coupling agents connected with metal via chemical absorption on the surface of Mg alloy and others depended on electro-deposition [ 26 ]. Eventually, the pyrrole monomer and silane coupling agent were electro-deposited together on the Mg alloy surface to prepare the PPy/silane film.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Corrosion Performance of PPy/Silane Film on AZ31 Magnesium Alloy via One-Step Cyclic Voltammetry

Peng

Cao

et al. 2021

Polymers

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PPy/silane composite film on a magnesium alloy surface was prepared by one-step cycle voltammetry. The mixed solution of methanol and water was used as the hydrolysis solvent of a γ-(2,3-glycidoxypropyl) trimethoxysilane coupling agent (KH-560). The surface morphology of the PPy/silane film, the electro-polymerization progress of KH-560 and PPy, the influence of the silane coupling agent and the corrosion behavior of the coated AZ31 Mg alloy were all investigated. The results indicated that the PPy/silane film on AZ31 Mg alloy via one-step cyclic voltammetry could provide better corrosion protection for an Mg alloy when the volume fraction of KH-560 in the hydrolysis solution was 15% and the time span of hydrolysis was 24 h with the 5.935 × 10−10 A cm−2 corrosion current density.

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Influence of pre-grafted pyrrole-based silane on the electrodeposition and chemical properties of polypyrrole films

Cited by 7 publications

References 47 publications

Electropolymerization of Pyrrole-Tailed Imidazolium Ionic Liquid for the Elaboration of Antibacterial Surfaces

Electropolymerization of Pyrrole-Tailed Imidazolium Ionic Liquid for the Elaboration of Antibacterial Surfaces

Synthesis and factor affecting on the conductivity of polypyrrole: a short review

Preparation and Corrosion Performance of PPy/Silane Film on AZ31 Magnesium Alloy via One-Step Cyclic Voltammetry

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