Improving the UV degradation resistance of epoxy coatings using modified carbon black nanoparticles

Ghasemi-Kahrizsangi, Ahmad; Neshati, Jaber; Shariatpanahi, Homeira; Akbarinezhad, E.

doi:10.1016/j.porgcoat.2015.04.011

Cited by 121 publications

(46 citation statements)

References 40 publications

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“…For the exposed PA11 coatings, it should be born in mind that generally after exposing a white polymeric material to ultraviolet, it tends to turn yellow [ 63 , 64 ]. For the coating under study, very small color differences caused by the xenon irradiation are monitored.…”

Section: Resultsmentioning

confidence: 99%

Manufacturing and Characterization of Coatings from Polyamide Powders Functionalized with Nanosilica

et al. 2020

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Polyamide coatings are thermoplastics with great advantages such as a good corrosion protection of the base metal and wear resistance. Their application as powder coatings is an environmentally friendly option that is currently attracting growing interest. However, during their life service, they can sometimes be exposed to conditions that they are unable to stand. In this work, a polyamide 11 (PA11) powder was reinforced with different percentages of silica nanoparticles (1–3 wt. %). Powder mixtures were prepared through extrusion followed by compression molding processes to manufacture coatings. For the coatings under study, the effect of 500 h xenon exposure was studied in order to know their ultraviolet (UV) resistance. Attenuated total reflection-Fourier transform infrared spectroscopy (FTIR-ATR) and differential scanning calorimetry (DSC) tests were performed to study changes in polymer structure and if they are affected by nanoparticles. The effect of nanoadditions and xenon exposure on hardness and stiffness were also evaluated. Furthermore, reciprocal wear tests were performed before and after irradiation, and the wear tracks were analyzed using optoelectronic microscopy and scanning electron microscopy (SEM). Finally, the aesthetic properties were measured. The results reveal improvements in mechanical and wear properties when 1% nanosilica is added to the PA11, which then become more relevant after xenon radiation exposure.

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Section: Resultsmentioning

confidence: 99%

Manufacturing and Characterization of Coatings from Polyamide Powders Functionalized with Nanosilica

et al. 2020

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“…Surface cracking was also observed on E/G 0.1 coating as depicted in Figure 13b; however, no evidence of pitting was observed. The capacity of graphene in enhancing the durability of the epoxy coating is well illustrated in Figure 13c, where increasing the load of graphene to 0.5%, E/G 0.5 , leads to prevention of pitting as well as significant reduction in the number of observed micro-cracks due to the enhanced UV stability induced by graphene [25].…”

Section: Thermal Behavior and Uv Degradationmentioning

confidence: 88%

Enhanced protective properties and UV stability of epoxy/graphene nanocomposite coating on stainless steel

Alhumade

Elkamel

et al. 2016

Express Polym. Lett.

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Abstract. Epoxy-Graphene (E/G) nanocomposites with different loading of graphene were prepared via in situ prepolymerization and evaluated as protective coating for Stainless Steel 304 (SS304). The prepolymer composites were spin coated on SS304 substrates and thermally cured. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) were utilized to examine the dispersion of graphene in the epoxy matrix. Epoxy and E/G nanocomposites were characterized using X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) techniques and the thermal behavior of the prepared coatings is analyzed using Thermogravimetric analysis (TGA) and Differential scanning calorimetry (DSC). The corrosion protection properties of the prepared coatings were evaluated using Electrochemical Impedance Spectroscopy (EIS) and Cyclic Voltammetry (CV) measurements. In addition to corrosion mitigation properties, the long-term adhesion performance of the coatings was evaluated by measuring the adhesion of the coatings to the SS304 substrate after 60 days of exposure to 3.5 wt% NaCl medium. The effects of graphene loading on the impact resistance, flexibility, and UV stability of the coating are analyzed and discussed. SEM was utilized to evaluate post adhesion and UV stability results. The results indicate that very low graphene loading up to 0.5 wt % significantly enhances the corrosion protection, UV stability, and impact resistance of epoxy coatings.

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“…The reason for the absorption of UV radiation by epoxy resin and as a result its degradation is the presence of an aromatic moiety in their structure. UV radiation, which has influence on discoloration and chalking of epoxy surface, is the major reason for limiting the use of epoxies for outdoor applications [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…Methods to counteract epoxy resin degradation can be found in the literature. By introducing antioxidants and photo stabilizers, which include titanium dioxide (TiO 2 ), and zinc oxide (ZnO), high-energy radiation can be attenuated or suppressed [ 7 ]. Carbon black (CB) is another additive used to stabilize polymers against UV radiation.…”

Section: Introductionmentioning

confidence: 99%

UV Sensor Based on Fiber Bragg Grating Covered with Graphene Oxide Embedded in Composite Materials

Lesiak

Bednarska

Małkowski

et al. 2020

Sensors

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Polymer–matrix composites degrade under the influence of UV radiation in the range of the 290–400 nm band. The degradation of polymer–matrix composites exposed to UV radiation is characterized by extensive aging of the epoxy matrix, resulting in deterioration of their mechanical properties. Glass fibers/epoxy resin composites were made by an out-of-autoclave method whereas a fiber optic sensor was placed between different layers of laminates. In our work, we used a fiber Bragg grating sensor covered with graphene oxide and embedded in a polymer matrix composite to monitor UV radiation intensity. Measurements of UV radiation may allow monitoring the aging process of individual components of the polymer composite. In order to estimate the number of microcracks of epoxy resin, microstructure observations were carried out using a scanning electron microscope.

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Improving the UV degradation resistance of epoxy coatings using modified carbon black nanoparticles

Cited by 121 publications

References 40 publications

Manufacturing and Characterization of Coatings from Polyamide Powders Functionalized with Nanosilica

Manufacturing and Characterization of Coatings from Polyamide Powders Functionalized with Nanosilica

Enhanced protective properties and UV stability of epoxy/graphene nanocomposite coating on stainless steel

UV Sensor Based on Fiber Bragg Grating Covered with Graphene Oxide Embedded in Composite Materials

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