Synthesis, characterization, and in vitro studies of graphene oxide/chitosan–polyvinyl alcohol films

Pandele, Andreea Mădălina; Ioniță, Mariana; Crică, Livia Elena; Dinescu, Sorina; Costache, Marieta; Iovu, Horia

doi:10.1016/j.carbpol.2013.10.085

Cited by 134 publications

(116 citation statements)

References 24 publications

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“…In general, a displacement to higher Raman shifts of the 2D band occurs as the layer thickness increases, although the more significant changes are attributed to the band shape, where 2D and D + G bands are Raman spectroscopy is a sensitive technique to symmetric covalent bonds, which allows discerning minor changes in the structural morphology of material, being therefore especially useful for the characterization of the disordered/ordered structure of materials with carbon content. Conjugated and double carbon-carbon bonds provide upper Raman intensities, and the graphitization degree and crystallite size can be calculated from ID/IG ratio [20,53]. Figure 4 represents the Raman spectrum of the GO/CS:PVA membrane.…”

Section: Structural and Chemical Characterization Of Go/cs:pva Membranementioning

confidence: 99%

“…Besides, their membranes did not exhibit a good dispersion over the entire polymer matrix, probably due mainly to low amount of CS blended with PVA polymer. Finally, GO-based membranes have been recently reviewed for their gas and liquid barrier properties [52] and CS:PVA blend membranes have showed significant increase in mechanical properties of the polymer upon the addition of even low loadings of exfoliated GO nanosheets [20].…”

Section: Introductionmentioning

confidence: 99%

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High Performance of Alkaline Anion-Exchange Membranes Based on Chitosan/Poly (vinyl) Alcohol Doped with Graphene Oxide for the Electrooxidation of Primary Alcohols

García‐Cruz

Casado-Coterillo

Irabien

et al. 2016

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Mixed matrix membranes (MMM) based on chitosan (CS) and poly (vinyl) alcohol (PVA) with a 50:50 w/w ratio doped with graphene oxide (GO) are prepared by solution casting and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), water uptake, alcohol permeability, ion exchange capacity (IEC) and OHć onductivity measurements. The SEM analysis revealed a dense MMM where the GO nanosheets were well dispersed over the entire polymer matrix. The incorporation of GO increased considerably the thermal stability of the CS:PVA membrane. The GO-based MMM exhibited a low conductivity of 0.19 mS¨cm´1 in part because the GO sheets did not change the crystallinity of the CS:PVA matrix. The reinforced structure created by the hydrogen bonds between the GO filler and the CS:PVA matrix resulted to be a good physical barrier for alcohol permeability, achieving a coefficient of diffusion of 3.38ˆ10´7 and 2.43ˆ10´7 cm 2¨s´1 after 60 and 120 min, respectively, thus avoiding additional alcohol crossover. Finally, the electrochemical performance of the GO-based MMM in the electrooxidation of propargyl alcohol was investigated in a Polymer Electrolyte Membrane Electrochemical Reactor (PEMER) under alkaline conditions, through the polarization curve and the electrolysis reactions, showing a performance comparable to anion-exchange commercial membranes.

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Section: Structural and Chemical Characterization Of Go/cs:pva Membranementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Performance of Alkaline Anion-Exchange Membranes Based on Chitosan/Poly (vinyl) Alcohol Doped with Graphene Oxide for the Electrooxidation of Primary Alcohols

García‐Cruz

Casado-Coterillo

Irabien

et al. 2016

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“…The addition of PVA in the chitosan caused a decrease in the intensity of the band at 1540.84 cm-1 of chitosan. CS-PVA composite exhibits an absorption band around 3255.54 cm-1 and 2897.40 cm-1 due to the -OH stretching and -CH2 asymmetric stretching from PVA [14].…”

Section: Sensing Mechanismmentioning

confidence: 99%

Highly Response and Sensitivity Chitosan-Polyvinyl alcohol Based Hexanal Sensors

et al. 2016

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Abstract. This work is to study the sensing properties of chitosanpolyvinyl alcohol film sensors upon hexanal gas exposure using vapour sensing technique. The sensor fabrication process was done using electrochemical deposition method by deposit the sensing materials on the gold patterned electrode with chitosan/PVA. The response value of chitosan-PVA film sensors towards hexanal was taken as an output voltage using electrical testing method. In this study, 1.75% of chitosan with 5% of PVA were mixed with the ratio of (95:5) was tested upon exposure to hexanal gas. The concentration of the hexanal was varied as 10 ppm, 20 ppm, 30 ppm. It was found that the chitosan-PVA film sensors showed fast response, stable, good stability, good recovery, repeatable and good sensitivity towards hexanal exposure. The morphology of the pure chitosan and chitosan-PVA was analyzed by scanning electron microscope (SEM) and the interaction between chitosan and PVA was examined by Fourier Transform Infrared Spectroscopy (FTIR). The FTIR results indicate the changes in characteristics of the spectral peaks due to the formation of the intermolecular bonds between chitosan and PVA. The SEM morphology of the composites showed flat smooth surface that be a sign of uniform distribution of chitosan and PVA mixture throughout the films.

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“…According specific interaction between urea and creatinine with reactive groups membrane is dominated by hydrogen bonds. In addition, appropriate ratio of hydrophilic and hydrophobic groups as well as the reactive groups charge orientation are among important factors in hemodialysis membranes [3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Chitosan, a non-toxic, inert and compatible polymer, began to be used as the base material for membrane synthesis due to its ability to dissolve in dilute acid and form a thin layer film [4]. However, the functional groups available in chitosan are not reactive enough to provide sufficient interaction with the target compound [5][6].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Citric Acid Crosslinked Chitosan/Poly(Vinyl Alcohol) Blend Membranes for Creatinine Transport

2018

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Synthesis, characterization, and in vitro studies of graphene oxide/chitosan–polyvinyl alcohol films

Cited by 134 publications

References 24 publications

High Performance of Alkaline Anion-Exchange Membranes Based on Chitosan/Poly (vinyl) Alcohol Doped with Graphene Oxide for the Electrooxidation of Primary Alcohols

High Performance of Alkaline Anion-Exchange Membranes Based on Chitosan/Poly (vinyl) Alcohol Doped with Graphene Oxide for the Electrooxidation of Primary Alcohols

Highly Response and Sensitivity Chitosan-Polyvinyl alcohol Based Hexanal Sensors

Preparation of Citric Acid Crosslinked Chitosan/Poly(Vinyl Alcohol) Blend Membranes for Creatinine Transport

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