Graphene oxide enriched with oxygen-containing groups: on the way to an increase of antioxidant activity and biocompatibility

Abdelhalim, Abdelsattar O.E.; Meshcheriakov, Anatolii A.; Maistrenko, Dmitrii N.; Molchanov, Oleg Е.; Ageev, Sergei V.; Ivanova, Daria A.; Iamalova, Nailia R.; Luttsev, Michail D.; Vasina, Lubov V.; Sharoyko, Vladimir V.; Semenov, Konstantin N.

doi:10.1016/j.colsurfb.2021.112232

Cited by 29 publications

(18 citation statements)

References 60 publications

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“…It is noteworthy that HC Mn exhibited the strongest scavenging activity, but HC H2SO4 had the weakest scavenging activity over the entire range of 0.08–2.0 mg/mL. This is due to the fact that the contents of carboxyl and methoxyl groups of uronic acids, as well as the high content of hydroxyl groups positively affect the antioxidant activity of polysaccharides [ 36 , 37 , 38 ]. In addition, it was reported [ 39 ] that the galactose-rich polysaccharides have a relatively high antioxidant activity, which is consistent with our data on the monosaccharide composition.…”

Section: Resultsmentioning

confidence: 99%

Molecular Characteristics and Antioxidant Activity of Spruce (Picea abies) Hemicelluloses Isolated by Catalytic Oxidative Delignification

et al. 2022

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Spruce (Piceaabies) wood hemicelluloses have been obtained by the noncatalytic and catalytic oxidative delignification in the acetic acid-water-hydrogen peroxide medium in a processing time of 3–4 h and temperatures of 90–100 °C. In the catalytic process, the H2SO4, MnSO4, TiO2, and (NH4)6Mo7O24 catalysts have been used. A polysaccharide yield of up to 11.7 wt% has been found. The hemicellulose composition and structure have been studied by a complex of physicochemical methods, including gas and gel permeation chromatography, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. The galactose:mannose:glucose:arabinose:xylose monomeric units in a ratio of 5:3:2:1:1 have been identified in the hemicelluloses by gas chromatography. Using gel permeation chromatography, the weight average molar mass Mw of hemicelluloses has been found to attain 47,654 g/mol in noncatalytic delignification and up to 42,793 g/mol in catalytic delignification. Based on the same technique, a method for determining the α and k parameters of the Mark–Kuhn–Houwink equation for hemicelluloses has been developed; it has been established that these parameters change between 0.33–1.01 and 1.57–472.17, respectively, depending on the catalyst concentration and process temperature and time. Moreover, the FTIR spectra of the hemicellulose samples contain all the bands characteristic of heteropolysaccharides, specifically, 1069 cm−1 (C–O–C and C–O–H), 1738 cm−1 (ester C=O), 1375 cm−1 (–C–CH3), 1243 cm−1 (–C–O–), etc. It has been determined by the thermogravimetric analysis that the hemicelluloses isolated from spruce wood are resistant to heating to temperatures of up to ~100 °C and, upon further heating, start destructing at an increasing rate. The antioxidant activity of the hemicelluloses has been examined using the compounds simulating the 2,2-diphenyl-2-picrylhydrazyl free radicals.

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Section: Resultsmentioning

confidence: 99%

Molecular Characteristics and Antioxidant Activity of Spruce (Picea abies) Hemicelluloses Isolated by Catalytic Oxidative Delignification

et al. 2022

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“…The protection activity is enhanced by the stacking effect [ 75 ], through which the graphene structure, coupled with the presence of polar oxygen containing functions, achieve the minimization of oxidation rate and the advanced deterioration of material quality. The antioxidant property of graphene oxide was demonstrated by its addition in food [ 76 ] or in the compatibilization of blood [ 77 ]. In fact, the stabilization efficiency of graphene oxide and, by extension, reduced graphene oxides, is promoted to a great measure by the functionalized materials with the oxygen containing units (hydroxyls and carbonyls) [ 24 , 78 ].…”

Section: Resultsmentioning

confidence: 99%

Packaging Materials Based on Styrene-Isoprene-Styrene Triblock Copolymer Modified with Graphene

Zaharescu¹,

Banciu²

2023

Polymers

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This study presents the improved stabilization effects of graphene on a polymer substrate, namely a styrene-isoprene-styrene triblock copolymer (SIS) which creates opportunities for long-term applications and radiation processing. The added graphene has a remarkable activity on the protection of polymer against their oxidation due to the penetration of free macroradical fragments into the free interlayer space. The chemiluminescence procedure used for the evaluation of the progress of oxidation reveals the delaying effect of oxidative degradation by the doubling extension of oxidation induction time, when the material formulation containing graphene is oxidized at 130 °C. The pristine polymer that is thermally aged requires an activation energy of 142 kJ mol−1, while the modified material needs 148, 158 and 169 kJ mol−1, for the oxidative degradation in the presence of 1, 2 and, respectively, 3 wt% of graphene. The contribution of graphene content (1 wt%) on the stability improvement of SIS is demonstrated by the increase of onset oxidation temperature from 190 °C for neat polymer to 196 °C in the presence of graphene and to 205 °C for the polymer stabilized with graphene and rosemary extract. The addition of graphene into the polymer formulations is a successful method for enlarging durability instead of the modification of receipt with synthesis antioxidants. The presumable applications of these studied materials cover the areas of medical wear, food packaging, commodities, sealing gaskets and others that may also be included through the products for nuclear power plants.

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“…GO-based membranes are rich in oxygenated-functional groups such as carboxyl, carbonyl, epoxy, hydroxyl, and lactol groups. 55 This results in high-water permeability. 56 Marjani et al have developed a GO laminate structure supported on a porous polyethersulfone (PES) substrate, namely the GO/PES membrane, using Hummers' method to fabricate the GO followed by phase inversion to make the NF membrane for water purification.…”

Section: Graphene Derivative-based Nf Membranesmentioning

confidence: 99%

Membranes prepared from graphene-based nanomaterials for water purification: a mini-review

Aizudin

Alias

et al. 2022

Nanoscale

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Graphene oxide enriched with oxygen-containing groups: on the way to an increase of antioxidant activity and biocompatibility

Cited by 29 publications

References 60 publications

Molecular Characteristics and Antioxidant Activity of Spruce (Picea abies) Hemicelluloses Isolated by Catalytic Oxidative Delignification

Molecular Characteristics and Antioxidant Activity of Spruce (Picea abies) Hemicelluloses Isolated by Catalytic Oxidative Delignification

Packaging Materials Based on Styrene-Isoprene-Styrene Triblock Copolymer Modified with Graphene

Membranes prepared from graphene-based nanomaterials for water purification: a mini-review

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