Journal ArticleDOI
Graphite Oxides as Effective Fire Retardants of Epoxy Resin
Yu Rok Lee,Soon Cheol Kim,Hyung-il Lee,Han Mo Jeong,Anjanapura V. Raghu,Kakarla Raghava Reddy,Byung Kyu Kim +6 more
TLDR
In this article, graphite oxides (GOs) at various oxidation states were examined as fire retardants of epoxy resins, and it was shown that the fine dispersion and disordering of layered structure of GO by the intercalation of the epoxy molecules into the gallery of GO also reduced the intumescent ability, and the fire retardant effects of GO.Abstract:
Graphite oxides (GOs) at various oxidation states were examined as fire retardants of epoxy resin. Excessive oxidation is detrimental to the fire retardant effect of GO because it generated a weak GO with reduced intumescent ability. GO manifested optimum fire retardant properties when it was properly oxidized due to the effective intumescence, demonstrating that intumescent GO needs to be strong enough to effectively push the epoxy resin matrix apart to cause efficient intumescence and generate a solid remnant char that acts as an efficient barrier. The fire retardant effect of GO was also reduced when a dispersion of GO in the epoxy resin was enhanced by sonication. This shows that the fine dispersion and disordering of layered structure of GO by the intercalation of epoxy molecules into the gallery of GO also reduced the intumescent ability, and the fire retardant effects of GO.read more
Citations
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Recent advances in the efficient reduction of graphene oxide and its application as energy storage electrode materials
TL;DR: A detailed description of the improvement in physiochemical properties of reduced GO (RGO) compared to pure GO is provided and new environmentally friendly types of reducing agents that can efficiently remove oxygen functionalities from the surface of GO are proposed.
Journal ArticleDOI
Carbon-family materials for flame retardant polymeric materials
TL;DR: In this article, a review of carbon-based materials for polymeric composites with flame retardant properties is presented, including graphite, graphene, carbon nanotubes, fullerenes as well as new emerging carbon forms (carbon nitride, carbon aerogels, etc).
Journal ArticleDOI
Carbon functionalized TiO2 nanofibers for high efficiency photocatalysis
TL;DR: In this paper, the photocatalytic properties of the functional TiO2 and carbon nanocomposite were tested via the decomposition of an organic pollutant, and the catalytic activity of the covalently functionalized nanocomposition was found to be significantly enhanced in comparison to unfunctionalized composite and pristineTiO2 due to the synergistic effect of nanostructured TiO 2 and amorphous carbon bound via covalent bonds.
Journal ArticleDOI
Energetic graphene oxide: Challenges and opportunities
Deepti Krishnan,Franklin Kim,Jiayan Luo,Rodolfo Cruz-Silva,Laura J. Cote,Hee Dong Jang,Jiaxing Huang +6 more
TL;DR: In this paper, the authors highlight the challenges and opportunities associated with GO's thermal instability such as the potential fire risk during large scale production and methods of mitigation, energy efficient way to reduce GO, photothermal patterning and sintering of graphene/polymer composites, and new syntheses using GO as an in situ power source.
Journal ArticleDOI
Review of carbon-based electrode materials for supercapacitor energy storage
Richa Dubey,Velmathi Guruviah +1 more
TL;DR: A review of different carbon-based materials used in the fabrication of electrodes for electrochemical capacitors is presented in this paper, along with materials used, a brief overview of different types of supercapacitors depending on charge storage mechanism is also discussed.
References
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Journal ArticleDOI
Single Sheet Functionalized Graphene by Oxidation and Thermal Expansion of Graphite
Michael J. McAllister,Je-Luen Li,Douglas H. Adamson,Hannes C. Schniepp,Ahmed Abdala,Jun-Jun Liu,Margarita Herrera-Alonso,David L. Milius,Roberto Car,Robert K. Prud'homme,Ilhan A. Aksay +10 more
TL;DR: In this article, a detailed analysis of the thermal expansion mechanism of graphite oxide to produce functionalized graphene sheets is provided, where it is shown that the decomposition rate of the epoxy and hydroxyl sites exceeds the diffusion rate of evolved gases, yielding pressures that exceed the van der Waals forces holding the graphene sheets together.
Journal ArticleDOI
Structure of Graphite Oxide Revisited
TL;DR: In this paper, the authors used 13C and 1H NMR spectra of graphite oxide derivatives to confirm the assignment of the 70 ppm line to C−OH groups and allow them to propose a new structural model for graphite oxides.
Journal ArticleDOI
Evolution of surface functional groups in a series of progressively oxidized graphite oxides
Tamás Szabó,Ottó Berkesi,Peter Forgo,K. V. Josepovits,Yiannis Sanakis,Dimitris Petridis,Imre Dékány +6 more
TL;DR: In this paper, a model based on elemental analysis, transmission electron microscopy, X-ray dif... was proposed to unravel the chemical structure of graphite oxide (GO).
Journal ArticleDOI
Graphite Oxide: Chemical Reduction to Graphite and Surface Modification with Primary Aliphatic Amines and Amino Acids
Athanasios B. Bourlinos,Dimitrios Gournis,Dimitrios Petridis,Tamás Szabó,and Anna Szeri,Imre Dékány +5 more
TL;DR: In this paper, the chemical reduction of graphite oxide (GO) to graphite by either NaBH4 or hydroquinone and also its surface modification with neutral, primary aliphatic amines and amino acids are described.