Fabrication Of Graphene Oxide Research Articles

Laser-assisted selective lithography of reduced graphene oxide for fabrication of graphene-based out-of-plane tandem microsupercapacitors with large capacitance

We present a laser lithography technique that uses a focused laser beam to fabricate out-of-plane tandem microsupercapacitors (MSCs) from reduced graphene oxide (rGO) with large areal capacitance. By controlling the depth of focus in a laser beam focused by an objective lens during laser lithography on a graphene oxide (GO) film, a rGO/GO/rGO structure is formed in the GO film, and subsequently, two independent interdigitated electrodes (IDEs) were fabricated on the top and bottom surfaces of the GO film. The out-of-plane tandem MSC with a parallel assembly of two rGO-IDEs showed two times larger areal capacitance than an in-plane single MSC with one rGO-IDE in the same MSC device footprint. The laser-assisted selective lithography technique using a focused laser beam developed in this study can be further applied to improve the energy density of MSCs without increasing the electrode area by vertically stacking multiple out-of-plane tandem IDEs.

Accelerated biomineralization of graphene oxide – incorporated cellulose acetate nanofibrous scaffolds for mesenchymal stem cell osteogenesis

For bone tissue engineering, it requires that the scaffolds have excellent biocompatibility, proper mechanical and osteoinductive properties. Electrospun nanofibers with extracellular matrices mimicking structure have proven to be good scaffolds for bone tissue repairing. Hybrid nanofibers in particular, endow the nanofibers with specific and multiple functionalities, and therefore have attracted increasing interests in the recent years. In this study, we fabricated graphene oxide (GO)-incorporated cellulose acetate (CA) nanofibrous scaffolds by electrospinning technique for enhancement of biomineralization and osteogenic differentiation of human mesenchymal stem cells (hMSCs). The results displayed the average fiber diameter was decreased from 595 to 285nm with the presence of GO from 0 to 1wt%. Furthermore, with incorporation of GO, the Young’s modulus of the nanofibers increased in a dose-dependent manner. More importantly, the incorporation of GO led to significantly enhanced adhesion and proliferation of hMSCs on the scaffolds, mainly due to the good biocompatibility and extracellular matrices mimicking structure of the hybrid nanofibers. Exposure of the nanofibers to the simulated body fluid revealed that the biomineralization was improved significantly with the doping of GO in the nanofibers, possibly owing to the more nucleation sites for calcium phosphate provided by GO. The accelerated biomineralization on the GO-CA nanofibers resulted in a markedly increase in the activity of biomineralization-relevant alkaline phosphatase, and thus induced osteogenic differentiation of hMSCs. The current work demonstrated that the GO-CA nanofibrous scaffolds may find potential applications in bone tissue engineering and other regenerative medicine fields.

Integration of Graphene Oxide on Nylon/Polyester/Cotton Fabrics for a Wearable Electronic Nose Sensor

This work presents a facile solution method to fabricate graphene oxide (GO) on fabrics for a wearable electronic nose sensor. Three types of fabrics such as nylon, polyester, and cotton were used as wearable substrates. Thin PVC film was laminated on the fabrics to promote deposition of electrodes on the fabrics. To determine types of solution for constructing GO on the fabrics, water and ethanol were compared as typical solvents to disperse GO. Water distributed GO nanoflake was uniformly coated on the fabrics by simple drop coating. Room temperature gas sensing was examined with GO integrated on the fabrics, and it exhibited n-type gas sensing behavior on 100 ppm ammonia and its response showed comparable values in resistance change with flat substrates.

Gas-Assisted Electrospraying Slurries of Silicon Fibers with Graphene Oxide for Binder-Free Electrode Fabrication

The development of lithium-ion anode materials with both high capacity and high cyclic retention has been a large research challenge in recent years. With increasing power demands, new materials need to maintain performance at high charge and discharge rates. To meet these needs, a multilayered silicon fiber/ reduced graphene oxide (RGO) slurry was directly fabricated onto current collectors with a gas-assisted electrospraying method. The sprayed solution is a slurry of silicon fibers and graphene oxide (GO) sheets in water. The silicon fibers used were made via a magnesium reduction of silica fibers formed from electrospinning. Electrospinning was used due to its advantage in forming micron to sub-micron materials, both uniformly and scalable. The GO sheets used are commercially available, single layer, exfoliated sheets 25 microns in length. The gas-assisted spraying method has several advantages over the conventional slurry-cast approach in that it uses no binder, no toxic solvents, sprays dry onto the current collector, and is also industrially scalable. Once sprayed, the electrodes were thermally annealed in a nitrogen atmosphere to form the Si/RGO composite. The fabricated electrodes feature layers of silicon fibers wrapped by RGO sheet forming a conductive network while also accommodating the mechanical stress from silicon volume expansion. The electrochemical performance of the Si/RGO electrodes shows high capacity retention and can maintain performance at rates up to 1 A/g. Reversible capacities in half cells can reach more than 1600 mAh/g at 0.1 A/g and 800 mAh/g at the high rate of 1 A/g (based on combined Si/RGO mass). The gas-assisted electrospraying method is a simple, scalable approach to wrap silicon in RGO for high performance lithium-ion anodes.

Amino-functionalized graphene oxide blend with monoethanolamine for efficient carbon dioxide capture

Abstract In this work, we have developed a highly efficient approach to fabricating graphene oxide (GO) functionalized with melamine molecule by chemical crosslinking. The melamine-functionalized graphene oxide (MEL-GO) was characterized by FT-IR, Raman, XRD TGA, XPS, SEM and TEM. Using monoethanolamine (MEA) aqueous solution as the basic absorbent, The absorbance performance of CO 2 in the (MEL-GO)+MEA+H 2 O solid-liquid hybrid absorbent for different mass concentrations of MEL-GO in 30 wt% MEA aqueous solution was investigated. The solubility of CO 2 in (MEL-GO)+MEA+H 2 O absorbents is much larger than that in 30 wt% MEA aqueous solution. Moreover, when the partial pressure of CO 2 continues to go up, the solubility of CO 2 was obviously increased with increasing mass concentrations of MEL-GO. The results suggest that MEL-GO is beneficial to enhance the solubility of CO 2 in MEA aqueous solution.

Fabrication of graphene oxide and hyperbranched polyurethane composite via in situ polymerization with improved mechanical and dielectric properties

Herein, we report a simple and one‐pot route for the synthesis of graphene oxide (GO)/hyperbranched polyurethane (HBPU) composite by in situ polymerization technique. The polyurethane (PU) chains formed covalent linkages with the exposed hydroxyl and carboxylic acid groups on the GO. The composite was characterized by optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), nuclear magnetic resonance (NMR) spectroscopy, and infrared (IR) spectroscopy. The characterization results revealed that the GO sheets were well dispersed within the HBPU matrix, resulting in very good enhancement in tensile strength and Young's modulus of the composites. Differential scanning calorimetry (DSC) suggests that the GO has a nucleating effect for the HBPU. The composites also show a mild increase in stability towards thermal degradation, and significantly, higher dielectric constant compared with neat HBPU at low frequencies. POLYM. COMPOS., 39:2765–2770, 2018. © 2017 Society of Plastics Engineers

γ-Irradiation assisted synthesis of graphene oxide sheets supported Ag nanoparticles with single crystalline structure and parabolic distribution from interlamellar limitation

This paper reported a method to fabricate graphene oxide sheets supported Ag nanoparticles (AgNPs/GOS) with single crystalline structure and parabolic distribution without surfactant or functional agent. We used imidazole silver nitrate as intercalation precursor into the layers of graphite oxide, and subsequently reduction and growth of interlamellar AgNPs were induced via γ-irradiation. The results illustrated that the synergism of interlamellar limitation of graphite oxide and fragmentation ability of γ-irradiation could prevent coalescent reaction of AgNPs with other oligomeric clusters, and the single crystalline and small-sized (below 13.9nm) AgNPs were prepared. Moreover, the content and size of AgNPs exhibited parabolic distribution on GOS surface because the graphite oxide exfoliated to GOS from the edge to the central area of layers. In addition, complete exfoliation degree of GOS and large-sized AgNPs were obtained simultaneously under suitable silver ions concentration. Optimized composites exhibited outstanding surface-enhanced Raman scattering properties for crystal violet with enhancement factor of 1.3×106 and detection limit of 1.0×10−7M, indicating that the AgNPs/GOS composites could be applied to trace detection of organic dyes molecules. Therefore, this study presented a strategy for developing GOS supported nanometal with single crystalline structure and parabolic distribution based on γ-irradiation.

Exceptional chiral separation of amino acid modified graphene oxide membranes with high-flux

The primary aim of this investigation was to achieve chiral separations via fabricating graphene oxide (GO) based membranes with high separation performances, derived from incorporating a chiral selector (L-Glutamic acid) into GO flakes, based on considerations of GO membranes having the inherently high throughput nature. The GO membrane was fabricated via a simple vacuum filtration method, in which L-Glutamic acid not only provided the stacked GO nanosheets with the necessary stability to overcome their inherent dispensability in water environment but also finely tuned spacing of the GO nanosheets and the resulting performance. The corresponding membrane structure together with GO and amino acid modified GO nanosheets was systematically characterized by SEM, TEM, AFM, XPS, XRD, FT-IR and so on. Finally, enantioseparation performances of amino acid modified GO membranes toward 3, 4-Dihydroxy-D, L-phenylalanine were detected. Results show that such membranes exhibit extraordinary chiral resolution properties, which are 1−2 orders of magnitude higher in the flux and greater in selectivity, compared to common chiral separation membranes. Our findings demonstrate that the modified GO membranes might provide another general approach to simultaneously facilitate high-flux and high-selectivity for a host of enantio- and bio-separations.

Exergy analysis of a shell-and-tube heat exchanger using graphene oxide nanofluids

Nanofluids are the new-generation heat transfer fluids largely used in heat exchangers for thermal energy transport applications. In this paper, graphene oxide was prepared in-house and used for nanofluid development and characterization. The graphene oxide was prepared by oxidizing purified natural flake graphite via the modified Hummers method. The morphology and structure of fabricated graphene oxide were characterized using X-ray diffraction analysis (XRD) and a scanning electron microscope (SEM). The graphene oxide nanofluids were prepared at 0.01 and 0.1wt.% concentrations. The particle size and zeta potential of nanofluids were measured using the dynamic light scattering (DLS) technique. The rheological behaviors of nanofluids were investigated at 25 and 40°C at different shear rates (10–1001/s). Thermal conductivity of nanofluids was measured using the transient hot wire method at 25 and 40°C. Exergy analysis showed that increasing the graphene oxide concentration from 0.01wt.% to 0.1wt.% resulted in 8.7% and 18.9% thermal conductivity enhancement at 25 and 40°C, respectively. Furthermore, the thermal performance of graphene oxide nanoparticles in a shell-and-tube heat exchanger was studied experimentally. The effect of nanofluid concentration, flow rates, temperature inlet and flow regime on the system’s exergy loss was studied experimentally. The results showed that using graphene oxide nanofluids as the hot fluid resulted in less exergy loss in the shell-and-tube heat exchanger under both laminar and turbulent conditions. Comparing the exergy loss of graphene oxide nanofluids to distilled (DI) water showed that DI water caused 22% and 109% higher exergy loss than in laminar conditions.

Controlling wrinkles and assembly patterns in dried graphene oxide films using lyotropic graphene oxide liquid crystals

ABSTRACTWe fabricated graphene oxide (GO) films on glass substrates by blade coating a lyotropic GO liquid crystal dispersion. Substrate temperature and blading speed were precisely controlled to manipulate the surface morphologies of GO films. The temperature and blade speed influenced the drying rate of film and the amount GO dispersion supplied. By controlling these parameters, film-thickness modulation and three types of surface wrinkle patterns were selectively achieved. We also plotted the wrinkle patterns diagram as functions of the film fabrication conditions. The films exhibited different optical anisotropies depending on wrinkle patterns. GO films with controlled wrinkles can be used as electrodes for supercapacitor applications owing to the large surface areas.

A unique scaffold for bone tissue engineering: An osteogenic combination of graphene oxide–hyaluronic acid–chitosan with simvastatin

Abstract The present study explores the first ever fabrication of graphene oxide (GO)–Chitosan (CS)–Hyaluronic acid (HA) based bioactive composite scaffold containing an osteogenesis-inducing drug simvastatin (SV) for bone tissue engineering application. Porosity, density, swelling, degradation and biomineralization studies favored the SV loaded GO–CS–HA scaffold in comparison to the conventional CS and HA based scaffolds. The in vitro results showed that the SV also offers a significant influence on osteogenesis and biomineralization and it possess excellent biocompatibility to be used as a bone tissue engineering scaffold, which is able to persuade osteogenesis and mineralization.

Synthesis and structural characterization of separate graphene oxide and reduced graphene oxide nanosheets

Graphene, being a unique carbon allotrope with a structure that is one atom thick, is known as a mysterious material in the current era due to its strange nature. It has attained global attention due to its amazing mechanical, electrical, thermal and optical properties. Recent progress has revealed that materials built with graphene can have a limitless impact on nanocomposites, electronic, optoelectronic and energy storage devices as well as chemical sensors. In the present study, graphite flakes were chemically oxidized in graphite oxide via the modified Hummers’ method, i.e. without adding sodium nitrate. The graphite oxide was exfoliated in distilled water by using an ultrasonic bath to fabricate graphene oxide nanosheets. The graphene was acquired through an inexpensive and large-scale production route to eliminate functional groups containing oxygen by using hydrazine monohydrate as a reducing agent. The reduced graphene oxide obtained through this route contained residual oxygen-functional groups which can act as active sites for gas molecular interaction and be used in a variety of applications like gas sensing. The prepared samples were analyzed using the dynamic light scattering technique, UV–visible spectroscopy, Fourier transform infrared spectroscopy, x-ray diffraction, scanning electron microscopy and atomic force microscopy.

Titanum Carbide MXene Flakes as Novel 2D Metallic Solution-Processed Films

Two-dimensional (2D) materials have opened up a field for developing the next generation of optoelectronic devices thanks to their novel properties such as ultrafast charge injection/extraction, strong light-matter interactions (despite being atomically thin) and quantum confinement(1). In addition, recent advancements in liquid phase exfoliation has revealed a new scalable route to investigate these materials(2). A good example is the fabrication of graphene oxide (GO) where the high resistive precursor of graphene that has to be reduced to recover its favorable optoelectronic properties. In most cases, ultra-high temperature (>1000ºC) and toxic chemicals (hydrazine) have to be used. In this talk, we will present a novel solution-processed film containing T3C2Tx monolayers, a 2D crystal from the recently discovered family of MXenes(3). This new MXene 2D family can be synthetized by selectively etching the A element of the MAX phase and formed into stacks of transition metal carbides and carbonitrides. Indeed, MXenes have recently gained attention due their a hydrophilic behavior, high metallic conductivity and excellent mechanical properties(4). Herein, we explore the use of freestanding nanometer-thin films of T3C2Tx for solution-processed transparent conductive electrodes. We demonstrate that our T3C2Tx films possess half of the sheet resistance (437 Ohm/sq) of the best reduced graphene oxide by produced solution-processed methods(5) while preserving an 80% of its transmission. In this talk, we will show that by using a simple spin-coating technique we can control the number of flakes forming the film (Figure 1a) and optimize the optoelectronic properties of our films so that they exhibit a figure of merit twice as large as reduced-GO (Figure 1b). The novelty of our approach is our in deep understanding of the limiting factors in the resistivity of the films such as heat treatments and functional end-groups. In addition, we will illustrate their metallic behavior by on-chip measurements and report for the first time the experimental measurement of their work function, which is crucial for advanced device design. This demonstration of a novel metallic and solution-processed 2D material with high conductivity using T3C2Txflakes with low-temperature fabrication provides a new possible pathway towards scalable manufacturing of ultrathin film devices. 1. F. Bonaccorso et al., Graphene, related two-dimensional crystals, and hybrid systems for energy conversion and storage. Science 347, 1246501 (2015). 2. V. Nicolosi, M. Chhowalla, M. G. Kanatzidis, M. S. Strano, J. N. Coleman, Liquid Exfoliation of Layered Materials. Science 340, 1226419 (2013). 3. M. Naguib, V. N. Mochalin, M. W. Barsoum, Y. Gogotsi, 25th Anniversary Article: MXenes: A New Family of Two-Dimensional Materials. Advanced Materials 26, 992-1005 (2014). 4. M. Naguib, Y. Gogotsi, Synthesis of Two-Dimensional Materials by Selective Extraction. Accounts of Chemical Research 48, 128-135 (2015). 5. H. A. Becerril et al., Evaluation of Solution-Processed Reduced Graphene Oxide Films as Transparent Conductors. ACS Nano 2, 463-470 (2008). Figure 1

Layer-By-Layer Assembly of Graphene Oxide/Polymer Coating Film to Improve Corrosion Resistance

Corrosion is a phenomenon that occur rust on the surface of metal. This phenomenon occurs in the overall part of the industry, causing a variety of problems to weakening mechanical properties of the material. Corrosion is prevented to coating treatment. This treatment can prevent corrosion by blocking water or oxygen molecules. Researchers have done many studies to prevent corrosion. In order to improve corrosion protection properties, pigments, such as zinc powder, clay etc, have been incorporated into coating materials. Coatings that imbedded pigments have a excellent corrosion protection properties. Recently, nano-sized pigments have better protection properties than conventional micro-size pigments. In this study, we fabricate graphene oxide(GO)/polymer composite coating thin film by using Layer-by-Layer(LBL) method. GO is role of a pigment that limits molecules to induce corrosion by the diffusion pathway. We survey anti-corrosion properties such as Tafel-Plot and Electrochemical Impedance Spectroscopy(EIS) by using electrochemical measurement system.

A review of graphene oxide, graphene buckypaper, and polymer/graphene composites: Properties and fabrication techniques

In this critical review, the preparation methods, unique properties, and graphene oxide structure as well as graphene have been interpreted. Various aspects for the graphene oxide reactivity were also discussed. Graphene oxide, usually obtained by exfoliating graphite, provides a way towards flexible, low-cost, bulk production paper-like materials known as buckypapers. Recently, graphene oxide and graphene buckypaper have been used as fillers for preparing composites. The buckypapers are freestanding thin porous network of carbon fillers bound by van der Waals interactions. Several techniques have been used to fabricate graphene oxide and graphene-based paper-like materials such as vacuum filtration method; spin coating technique, resin infiltration technique, evaporation-induced, and self-assembly technique. Among these, the most suitable technique is Langmuir-Blodgett assembly, where the graphene oxide paper formed is usually highly uniform. Free standing polymer/graphene oxide and polymer/graphene paper materials show remarkable mechanical stiffness and excellent flexibility combined with outstanding electrical conductivity. Incorporating polymer into graphene oxide and graphene buckypaper may modify the polymer and filler properties producing high performance materials. The buckypaper made from functionalized filler may form networks that facilitate penetrating matrix chains and result in composites with improved mechanical performance. Due to their outstanding physical, thermal, and electrical properties, these papers have promising applications such as; body armour, aerospace structure improvement, armoured vehicles, flexible energy storage devices, sensors, memory devices, transparent conductors, and photovoltaics.

Facile synthesis of diverse graphene nanomeshes based on simultaneous regulation of pore size and surface structure.

Recently, graphene nanomesh (GNM) has attracted great attentions due to its unique porous structure, abundant active sites, finite band gap and possesses potential applications in the fields of electronics, gas sensor/storage, catalysis, etc. Therefore, diverse GNMs with different physical and chemical properties are required urgently to meet different applications. Herein we demonstrate a facile synthetic method based on the famous Fenton reaction to prepare GNM, by using economically fabricated graphene oxide (GO) as a starting material. By precisely controlling the reaction time, simultaneous regulation of pore size from 2.9 to 11.1 nm and surface structure can be realized. Ultimately, diverse GNMs with tunable band gap and work function can be obtained. Specially, the band gap decreases from 4.5–2.3 eV for GO, which is an insulator, to 3.9–1.24 eV for GNM-5 h, which approaches to a semiconductor. The dual nature of electrophilic addition and oxidizability of HO• is responsible for this controllable synthesis. This efficient, low-cost, inherently scalable synthetic method is suitable for provide diverse and optional GNMs, and may be generalized to a universal technique.

Green Route Fabrication of Graphene Oxide Reinforced Polymer Composites with Enhanced Mechanical Properties

A facile and “Green” route has been applied to fabricate graphene oxide (GO) reinforced polymer composites utilizing “deionized water” as solvent. The GO was reinforced into water soluble poly(vinyl alcohol) (PVA) and poly-2-acrylamido-2-methyl-1-propanesulfonic acid (PAMPS) matrix by ultrasonication followed by mechanical stirring. The incorporation and dispersion of the GO in the polymer matrix were analyzed by XRD, FE-SEM, AFM, FT-IR, and TGA. Further, the FE-SEM and AFM images revealed that the surface roughness and agglomeration of the GO in the polymer matrix increased by increasing its concentration. Ionic exchange capacity, proton conductivity, and tensile texture results showed that the reinforcement of GO in the polymer matrix enhances the physicochemical properties of the host polymer. These PVA/PAMPS/GO nanocomposites showed improved mechanical stability compared to the pristine polymer, because of strong interfacial interactions within the components and homogeneous dispersion of the GO sheets in the PVA/PAMPS matrix.

Effect of particle size and viscosity on thermal conductivity enhancement of graphene oxide nanofluid

In this study, first, graphene oxide nanosheets were synthesized based on the modified Hummers methods. The physicochemical properties of fabricated graphene oxide were characterized using X-ray diffraction analysis (XRD), a scanning electron microscope (SEM), and UV–Vis spectrophotometry. Second, graphene oxide nanofluids were prepared at different concentrations (0.01, 0.05, 0.1 and 0.5wt.%) in water (base fluid). Particle-size distribution and stability of the colloidal solution of the graphene oxide nanofluids were investigated using dynamic light scattering and zeta potential techniques. Also, rheological behavior of graphene oxide nanofluids was studied at different temperatures (25°C, 40°C, and 60°C) and different shear rates (10–100 1/s). Results show that both particle size and viscosity of graphene oxide nanofluids increased linearly by increasing the graphene oxide concentration from 0.01 to 0.1wt.%, but there was a very sharp increment on average particle size and viscosity by increasing the concentration to 0.5wt.%. The thermal conductivity of graphene oxide nanofluids was measured at different temperatures. Thermal conductivity of graphene oxide nanofluids depends on both particle-size distribution of graphene oxide and viscosity of graphene oxide nanofluids. All graphene oxide nanofluids showed enhanced thermal conductivity compared to the base fluid, water. Increasing the graphene oxide concentration from 0.01wt.% to 0.1wt.% resulted in 8.7% and 18.9% thermal conductivity enhancement at 25°C, respectively. However, further concentration increment to 0.5wt.% increased thermal conductivity to 19.9%. This behavior shows that there is an optimal concentration of graphene oxide at which particle size and viscosity of graphene oxide nanofluids exhibit significant thermal conductivity enhancement, and further concentration increments have no significant effect on thermal conductivity enhancement.

Amino acids functionalized graphene oxide for enhanced hydrophilicity and antifouling property of poly(vinylidene fluoride) membranes

Herein, functionalized graphene oxide (GO) was prepared by the covalent functionalization with amino acids (lysine, glycine, glutamic acid and tyrosine) in this study. Zeta potential results demonstrated that covalent functionalization of GO with amino acids was favourable for their homogeneous dispersion in water and organic solvents. Based on the higher absolute value of zeta potential and the better dipersion stability of GO-lysine, the PVDF/GO-lysine hybrid membranes were then prepared via the phase inversion induced by immersion precipitation technique. SEM images showed a better pore diameter and porosity distribution on the PVDF/GO-lysine membrane surface. The zeta potential absolute value of the PVDF/GO-lysine membrane surface was higher than that of the virgin PVDF membrane. Furthermore, the PVDF/GO-lysine membranes surface exhibited good hydrophilicity. The water flux of PVDF/GO-lysine membranes can reach two times of that of the virgin PVDF membrane. And the BSA adsorbed amount on PVDF/GO-lysine surface was decreased to 0.82 mg/cm2 for PVDF/GO-lysine-8% membrane. Filtration experiment results indicated that the fouling resistance was significantly improved for the PVDF/GO-lysine membranes. As a result, lysine functionalized GO will provide a promising method to fabricate graphene oxide based hybrid membranes with effective antifouling property and hydrophilicity.

Enhancement in Mechanical, Thermal, and Dielectric Properties of Functionalized Graphene Oxide Reinforced Epoxy Composites

AbstractThe present work has the objective of fabricating graphene oxide (GO) and amine‐functionalized graphene oxide (F‐GO) reinforced epoxy composites using the casting method. Epoxy resin was dispersed separately with GO (0.5 wt%) and F‐GO (0.5 and 1 wt%), and then the epoxy resin mixture cured with triethylenetetraamine at room temperature. The synthesized GO and F‐GO were characterized by FT‐IR and Raman spectroscopy. The interfacial interaction of Si in the composite was studied by XPS. The formation of GO and F‐GO was confirmed by XRD. The tensile and flexural strength composites were measured using the UTM. The thermal behavior and dynamic mechanical behavior were examined by TGA and DMA. The surface morphology and dielectrical properties were analyzed by SEM, TEM, and impedance analyses. The results obtained from epoxy/F‐GO (0.5 wt%) composite revealed higher mechanical and thermal properties than neat epoxy and epoxy/GO composites.