PVA/PANI/rGO ternary electrospun mats as metal-free anti-bacterial substrates

Ghobadi, Sajjad; Mehraeen, Shayan; Bakhtiari, Rokhsareh; Shamloo, Bahar; Sadhu, Veera; Papila, Melih; Cebeci, Fevzi Çakmak; Gürsel, Selmiye Alkan

doi:10.1039/c6ra16785c

Cited by 19 publications

(10 citation statements)

References 35 publications

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“…1,2 Graphene's properties, empowered by its unique sp 2 formation of carbon atoms leading to 2D layered structures, are desired in a variety of disciplines. 3,4 These superior properties make graphene a perfect candidate in various elds including composites as reinforcement additives, 5,6 clean and renewable energy production [1][2][3][4] biocompatible thin lms, [1][2][3][4][5][6][7] and nanoelectronics. 8 There have been several reports of different forms of graphene-based substances.…”

Section: Introductionmentioning

confidence: 99%

Macroscopic assembly of flexible and strong green graphene fibres

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Macroscopic assembly of flexible and strong green graphene fibres

et al. 2017

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“…In this manner, our group desired to take the advantage of graphene-carbon black (CB) hybrid support morphology and electrospraying technique to alter the PEM fuel cell performance. Recently, we have reported graphene-containing fibrous structures formed by electrospinning [28,29]. In literature, there are several studies about graphene hybrid supports for Pt, yet, to the best of our knowledge, hybrid structure was formed by mechanical mixing of Pt/graphene electrocatalyst with pristine carbon black or commercial Pt/CB and graphene [26,30].…”

Section: Introductionmentioning

confidence: 99%

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

et al. 2016

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Here, we report a novel electrode structure with graphene and graphene-carbon black hybrids by electrospraying for polymer electrolyte membrane fuel cells. After syntheses of platinum (Pt)/partially reduced graphene oxide (rGO) and Pt/r-GO/carbon black (CB) hybrid electrocatalysts, suspensions of synthesized electrocatalyst inks were prepared with Nafion Ò ionomer and poly(vinylidene fluoride-cohexafluoropropylene) and electrosprayed over carbon paper to form electrodes. Electrosprayed catalyst layer exhibited uniform and small size Pt distribution. As the graphene content increases micrometer-sized droplet, pore formation and surface roughness of the electrode increase. Thus, an open porous electrode structure which is favorable for mass transport is achieved by electrospraying. The maximum power densities, 324 mW cm -2 for Pt/rGO and 441 mW cm -2 for Pt/rGO/CB electrosprayed electrodes, were achieved at a relatively low catalyst loading.

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“…A broad absorption band was observed at ~3000-3600 cm -1 , representing the O-H stretching vibration of the PVA. 45,46 The bands discernible at 2920 and 2850 cm -1 were assigned to CH and CH 2 asymmetric stretching vibrations of the PVA. 47 A weak peak at 1740 cm -1 representing the C = O stretching vibration corresponded to the vinyl acetate group of the PVA.…”

Section: Resultsmentioning

confidence: 99%

In vitro biocompatibility evaluation of radiolytically synthesized silver/polyvinyl hydrogel nanocomposites for wound dressing applications

Swaroop

Patil

Mallaiah

2020

Journal of Bioactive and Compatible Polymers

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Nano silver/polyvinyl alcohol hydrogel nanocomposites have been prepared using gamma irradiation technique. Gamma irradiation serves as a crosslinking agent for the polyvinyl alcohol hydrogels and also acts as a reducing agent for reduction of Ag+ ions to zero valent Ag0 within the polyvinyl alcohol crosslinked network. The microstructural characteristics of the prepared composites were studied using powder X-ray diffraction, ultraviolet–visible spectroscopy, Fourier-transform infrared spectroscopy and field emission scanning electron microscopy analysis. The data obtained by these characterizations indicate the homogeneous distribution of silver nanoparticles on the polyvinyl alcohol network. The swelling properties and mechanical parameters of the silver/polyvinyl alcohol hydrogel nanocomposites tend to show improvements, making them a better material for wound care applications. The silver/polyvinyl alcohol hydrogel nanocomposites have shown good antibacterial potential against both Gram-positive and Gram-negative bacteria and shown nil or minimal cytotoxic effect on human melanoma (SK-MEL-2) and mouse melanoma (B16-F1) cell lines. Overall, it was concluded that under optimized condition, silver/polyvinyl alcohol hydrogel nanocomposites synthesized using gamma irradiation technique are excellent candidates for wound dressing application.

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PVA/PANI/rGO ternary electrospun mats as metal-free anti-bacterial substrates

Abstract: Successful performance of biocompatible hybrid systems in various biomedical applications such as wound healing patches, and scaffolds for stem cell preparation have been reported.

Cited by 19 publications

References 35 publications

Macroscopic assembly of flexible and strong green graphene fibres

Macroscopic assembly of flexible and strong green graphene fibres

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

In vitro biocompatibility evaluation of radiolytically synthesized silver/polyvinyl hydrogel nanocomposites for wound dressing applications

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