Fabricating an epoxy composite coating with enhanced corrosion resistance through impregnation of functionalized graphene oxide-co-montmorillonite Nanoplatelet

Sari, Morteza Ganjaee; Shamshiri, Mohammadreza; Ramezanzadeh, Bahram

doi:10.1016/j.corsci.2017.09.024

Cited by 135 publications

(23 citation statements)

References 58 publications

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“…When nanohybrids were analyzed, we noted that the characteristic peak remained and only slightly shifted a to lower angle; in addition, its shape became broader with decreased intensity, indicating that the effects between MMT and GO did not change the original layered structure of MMT. Moreover, the shift indicates an increase in the interlayer distance within the crystalline structure of the clay lamellae when functionalization with graphene oxide was realized [ 25 , 26 ]. This is an indicator that the GO was successfully intercalated between MMT platelets [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

Layered Clay–Graphene Oxide Nanohybrids for the Reinforcement and Fire-Retardant Properties of Polyurea Matrix

et al. 2021

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Nanostructures are more and more evolved through extensive research on their functionalities; thus, the aim of this study was to obtain layered clay–graphene oxide nanohybrids with application as reinforcing agents in polyurea nanocomposites with enhanced thermal–mechanical and fire-retardant properties. Montmorillonite (MMT) was combined with graphene oxide (GO) and amine functionalized graphene oxide (GOD) through a new cation exchange method; the complex nanostructures were analyzed through FTIR and XPS to assess ionic interactions between clay layers and GO sheets by C1s deconvolution and specific C sp3, respective/ly, C-O secondary peaks appearance. The thermal decomposition of nanohybrids showed a great influence of MMT layers in TGA, while the XRD patterns highlighted mutual MMT and GO sheets crystalline-structure disruption by the d (002) shift 2θ = 6.29° to lower values. Furthermore, the nanohybrids were embedded in the polyurea matrix, and the thermo-mechanical analysis gave information about the stiffness of MMT–GO nanocomposites, while GOD insertion within the MMT layers resulted in a 30 °C improvement in the Tg of hard domains, as shown in the DSC study. The micro CT analysis show good dispersion of inorganic structures within the polyurea, while the SEM fracture images revealed smooth surfaces. Cone calorimetry was used to evaluate fire-retardant properties through limiting the oxygen index, and MMT–GOD based nanocomposites showed a 35.4% value.

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Section: Resultsmentioning

confidence: 99%

Layered Clay–Graphene Oxide Nanohybrids for the Reinforcement and Fire-Retardant Properties of Polyurea Matrix

et al. 2021

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“…Characteristic vibration absorption peaks of oxygen-containing functional groups, such as O-H bonds at 3427 cm −1 , C=O bonds at 1727 cm −1, and C-O-C bonds at 1052 cm −1 , can be clearly observed in the GO FT-IR spectrum. In the ODA-GO FT-IR spectrum, the appearance of new vibration absorption peaks characteristic of N-H bonds at 1571 cm −1 and C-N bonds at 1210 cm −1 and the decline in the intensity of peaks of C-O-C bonds at 1052 cm −1 and C=O bonds at 1727 cm −1 indicate that there was a chemical reaction between the oxygen-containing functional groups of the GO nanosheets and the amine groups of ODA [2,6,12]. Figure 3c shows the Raman spectra of GO and ODA-GO.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

“…(4) A good corrosion inhibition effect can be achieved by adding nanoparticles with special properties and constructing a highly hydrophobic surface by certain physical or chemical methods. 5The addition of nanoparticles with special physical and chemical properties can effectively inhibit charge transfer at the metal/electrolyte interface [12,[28][29][30][31].…”

Section: Mechanism By Which Oda-go Improves Corrosion Resistance In Smentioning

confidence: 99%

“…Graphene oxide, a derivative of graphene, is a nanoparticle that has attracted increasing research attention for its excellent mechanical and physical properties [10,11]. On the one hand, the addition of graphene oxide (GO) can improve the anti-corrosion properties of polymer coatings by lengthening the diffusion path of the corrosive species and providing a good physical barrier against corroding agents [12]. On the other hand, the poor dispersion of GO in coatings due to the many hydrophilic oxygen-containing groups on its surface increases the number of defects in the coating and weakens its physical barrier effect.…”

Section: Introductionmentioning

confidence: 99%

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Hydrophobic Modification of Graphene Oxide and Its Effect on the Corrosion Resistance of Silicone-Modified Epoxy Resin

Yuan

Zhang

et al. 2021

Metals

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This study modified graphene oxide (GO) with hydrophilic octadecylamine (ODA) via covalent bonding to improve its dispersion in silicone-modified epoxy resin (SMER) coatings. The structural and physical properties of ODA-GO were characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and contact angle tests. The ODA-GO composite materials were added to SMER coatings by physical mixing. FE-SEM, water absorption, and contact angle tests were used to evaluate the physical properties of the ODA-GO/SMER coatings, while salt spray, electrochemical impedance spectroscopy (EIS), and scanning Kelvin probe (SKP) methods were used to test the anticorrosive performance of ODA-GO/SMER composite coatings on Q235 steel substrates. It was found that ODA was successfully grafted onto the surfaces of GO. The resulting ODA-GO material exhibited good hydrophobicity and dispersion in SMER coatings. The anticorrosive properties of the ODA-GO/SMER coatings were significantly improved due to the increased interfacial adhesion between the nanosheets and SMER, lengthening of the corrosive solution diffusion path, and increased cathodic peeling resistance. The 1 wt.% ODA-GO/SMER coating provided the best corrosion resistance than SMER coatings with other amounts of ODA-GO (including no addition). After immersion in 3.5 wt.% NaCl solution for 28 days, the low-frequency end impedance value of the 1 wt.% ODA-GO/SMER coating remained high, at 6.2 × 108 Ω·cm2.

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“…After functionalization of GO with ETEO, the XRD pattern of the ETEO-GO sample showed no significant diffraction peaks, and the diffraction peak of GO completely disappeared. This phenomenon may indicate that the ETEOs on the GO surfaces have been able to exfoliate away the lamellae and produce a significantly less compact structure [40]. That was why the XRD shows no diffraction alongside the measurable angel span.…”

Section: Xrd Analysismentioning

confidence: 99%

Preparation and Corrosion Resistance of ETEO Modified Graphene Oxide/Epoxy Resin Coating

et al. 2019

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Improving the corrosion resistance of epoxy resin coatings has become the focus of current research. This study focuses on synthesizing a functionalized silane coupling agent (2-(3,4-epoxycyclohexyl)ethyl triethoxysilane) to modify the surface of graphene oxide to address nanomaterial agglomeration and enhance the coating resistance of the epoxy resin coating to corrosion by filling the coating with functionalized graphene oxide. Functionalized graphene oxide and coatings filled with functionalized graphene oxide were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The corrosion performance of each coating was studied by electrochemical impedance spectroscopy and a salt spray test. Results showed that the incorporation of functionalized graphene oxide enhances the corrosion protection performance of the epoxy composite coating, and the composite coating exhibited the best anticorrosion performance when the amount of functionalized graphene oxide was 0.7 wt %.

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Fabricating an epoxy composite coating with enhanced corrosion resistance through impregnation of functionalized graphene oxide-co-montmorillonite Nanoplatelet

Cited by 135 publications

References 58 publications

Layered Clay–Graphene Oxide Nanohybrids for the Reinforcement and Fire-Retardant Properties of Polyurea Matrix

Layered Clay–Graphene Oxide Nanohybrids for the Reinforcement and Fire-Retardant Properties of Polyurea Matrix

Hydrophobic Modification of Graphene Oxide and Its Effect on the Corrosion Resistance of Silicone-Modified Epoxy Resin

Preparation and Corrosion Resistance of ETEO Modified Graphene Oxide/Epoxy Resin Coating

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