A New Antibacterial <i>N</i>-Halamine Coating Based on Polydopamine

Nazi, Nadia; Humblot, Vincent; Debiemme‐Chouvy, Catherine

doi:10.1021/acs.langmuir.0c01856

Cited by 25 publications

(25 citation statements)

References 54 publications

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“…The atomic ratio N/C is 0.065, whereas for PDA itself, it is higher, 0.125 (Table S1). The low N/C ratio indicates that the material is a composite of ERGO and PDA, in good agreement with the C 1s spectra (Figure S4).…”

Section: Resultssupporting

confidence: 80%

Preventing Graphene from Restacking via Bioinspired Chemical Inserts: Toward a Superior 2D Micro-supercapacitor Electrode

Bouzina

Perrot

Sel

et al. 2021

ACS Appl. Nano Mater.

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Graphene-based composites are promising materials for supercapacitors due to the high specific surface area and electrical conductivity of graphene. Reduction of graphene oxide (GO) is a practical approach to obtain graphene-like material but it suffers from the re-stacking of the graphene sheets. Herein, a two-dimensional composite electrode based on electrochemically reduced GO (ERGO) and polydopamine (PDA) is reported where the PDA is used as a "bioinspired chemical insert" to tackle with the restacking issue of graphene layers. This green and facile electrochemical fabrication method starts from the electro-reduction of GO followed by the electro-oxidation of dopamine (DA), present in the same electrolyte, by a simple switch between a cathodic to an anodic potential. The optimized ERGO-PDA composite electrode possesses combined features of excellent capacitive behavior, with a relaxation time (0) of 0.88 s, high gravimetric and volumetric capacitances (178 F•g -1 and 297 F•cm -3 , respectively, at 10 mV•s -1 ) and finally an excellent cycling stability at 100 to 2000 mV•s -1 , at least for 30000 cycles. DA electropolymerization yield monitored by quartz crystal microbalance and X-ray diffraction measurements demonstrate that PDA is formed between the graphene sheets which prevents the sheets from restacking and facilitate species diffusion inside the composite leading to a volumetric energy density of 8.6 mWh•cm -3 for a power density of 7.8 W•cm -3 . Additionally, the electrochemical quartz crystal microbalance demonstrates a dominant cationic charge compensation and a very efficient interfacial transfer characteristics since a totally reversible mass response during charge/discharge was observed for the optimized ERGO-PDA electrode.

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Section: Resultssupporting

confidence: 80%

Preventing Graphene from Restacking via Bioinspired Chemical Inserts: Toward a Superior 2D Micro-supercapacitor Electrode

Bouzina

Perrot

Sel

et al. 2021

ACS Appl. Nano Mater.

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“…As alternatives to these compounds, a class of antibacterial compounds, N-halamines, has attracted great interest in recent years [24][25][26]. These compounds contain nitrogenhalogen covalent bonds, which are formed by the halogenation of imide, amide or amine groups.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Antibacterial Response of N-Halamine Coatings Based on Polydopamine

Nazi

Marguier

Debiemme‐Chouvy

et al. 2022

Colloids and Interfaces

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Due to the ability of microorganisms to first adhere to a material surface and then to lead to the formation of a biofilm, it is essential to develop surfaces that have antimicrobial properties. It is well known that N-halamine coatings allow us to prevent or minimize such phenomena. In the present work, various polydopamine (PDA) coatings containing chloramine functions were studied. In fact, three PDA-based films were formed by the simple immersion of a gold substrate in a dopamine solution, either at pH 8 in the presence or not of polyethyleneimine (PEI), or at pH 5 in the presence of periodate as an oxidant. These films were characterized by polarization modulation reflection absorption infrared spectroscopy and X-ray photoelectron spectroscopy analyses, and by scanning electron microscopy observations. The chlorination of these PDA films was performed by their immersion in a sodium hypochlorite aqueous solution, in order to immobilize Cl(+I) into the (co)polymers (PDA or PDA–PEI). Finally, antibacterial assays towards the Gram-negative bacteria Escherichia coli (E. coli) and the Gram-positive bacteria Staphylococcus epidermidis (S. epidermidis) were conducted to compare the bactericidal properties of these three N-halamine coatings. Regardless of the bacteria tested, the PDA coating with the best antibacterial properties is the coating obtained using periodate.

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“…Cationic polymers are believed to impart antimicrobial activity by disrupting cell membrane functions mainly through an ionic exchange . Previous studies showed that the amine groups in PDA could be directly chlorinated and converted to N -halamine upon treatment with a dilute bleach solution to form an antimicrobial surface. , However, if N -halamine is completely consumed, the PDA surface will no longer have an antibacterial function. Therefore, we considered that the hybrid coatings that combine PDA and PEI will have the opportunity to form a dual biocidal surface with N -halamine (Figure ).…”

Section: Introductionmentioning

confidence: 99%

Rapid Biocidal Activity of N-Halamine-Functionalized Polydopamine and Polyethylene Imine Coatings

2021

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Microorganisms easily adhere to the surface of substrates and further form biofilms, which present problems in various fields. Therefore, the development of surfaces with antimicrobial adhesion or viability is a promising approach. In this study, we were committed to develop a rapid sterilizing coating. First, polyester fibers were immersed into a mixing solution of dopamine (PDA) and polyethyleneimine (PEI) for forming the co-deposition of PDA and PEI coatings. After this, the co-deposition of PDA and PEI coatings was immersed in a solution of household bleach for chlorination. We found that the nitrogens of PDA and PEI could be chlorinated repeatedly and that the oxidative chlorine content increased with the increasing PEI concentration upon co-deposition. Next, the efficacy of the co-deposition of chlorinated PDA and PEI coatings in eliminating Staphylococcus aureus and Escherichia coli was investigated. We found that the antibacterial ability of the coatings increased with increasing PEI content. In addition, the chlorinated co-deposition coatings had significantly improved antibacterial properties compared to the unchlorinated ones. The chlorinated co-deposition coatings inactivated >99.99% of S. aureus and >99.9% of E. coli after contact of less than 10 min. Therefore, chlorination of a PDA/PEI co-deposition surface is a feasible method for use in antibacterial coatings.

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A New Antibacterial N-Halamine Coating Based on Polydopamine

Cited by 25 publications

References 54 publications

Preventing Graphene from Restacking via Bioinspired Chemical Inserts: Toward a Superior 2D Micro-supercapacitor Electrode

Preventing Graphene from Restacking via Bioinspired Chemical Inserts: Toward a Superior 2D Micro-supercapacitor Electrode

Optimization and Antibacterial Response of N-Halamine Coatings Based on Polydopamine

Rapid Biocidal Activity of N-Halamine-Functionalized Polydopamine and Polyethylene Imine Coatings

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