Synthesis and application of mesoporous carbon nanospheres containing walnut extract for fabrication of active protective epoxy coatings

Haddadi, Seyyed Arash; Kohlan, Taha Behroozi; Momeni, Sina; Ramazani, S A Ahmad; Mahdavian, M.

doi:10.1016/j.porgcoat.2019.04.046

Cited by 36 publications

(10 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This work follows up our prior work on the application of CHSs as the host for encapsulation of corrosion inhibitors for corrosion protection of the mild steel surface [38,39]. In the prior publication [12], we doped epoxy and polyamine in separate carbon capsules to investigate the mechanical and long-term corrosion protection properties of the doped CHSs containing epoxy coatings in the absence of coating defects.…”

Section: Introductionmentioning

confidence: 98%

Self-healing epoxy nanocomposite coatings based on dual-encapsulation of nano-carbon hollow spheres with film-forming resin and curing agent

Haddadi

Ramazani

Mahdavian

et al. 2019

Composites Part B: Engineering

View full text Add to dashboard Cite

The ability of an active protective organic coating to restore its protection functionality in case of a coating defect is of pivotal importance to ensure durable performance under demanding corrosive conditions. In this paper, a self-healing epoxy system is fabricated by separate encapsulation of epoxy and polyamine in carbon hollow spheres (CHSs) and the autonomous healing performance of the system applied on mild steel is investigated. CHSs were synthesized via a silica templating method using carbonization of polysaccharide shells formed on the surface of silica templates. Consequently, epoxy and polyamine were loaded in separate capsules by dispersion of CHSs into the dilute solutions of epoxy/acetone and polyamine/acetone respectively, under vacuum conditions. The synthesized CHSs were characterized before and after the silica removal using field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The CHSs loaded with the film forming agents were assessed using thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. Furthermore, the protective and self-healing properties of the coatings fabricated were studied using electrochemical impedance spectroscopy (EIS), scanning vibrating electrode technique (SVET) and salt spray testing. The results showed that scribe defects in epoxy coatings with 10 wt. % epoxy and polyamine capsules were healed effectively upon efficient release and subsequent recombination of the epoxy and polyamine agents reforming a protective layer at the damaged region.

show abstract

Section: Introductionmentioning

confidence: 98%

Self-healing epoxy nanocomposite coatings based on dual-encapsulation of nano-carbon hollow spheres with film-forming resin and curing agent

Haddadi

Ramazani

Mahdavian

et al. 2019

Composites Part B: Engineering

View full text Add to dashboard Cite

show abstract

“…The main environmental factors that degradation of polymer coatings are water, temperature, and UV radiation, and so forth . Accelerated aging tests are used to estimate the service life of polymer coatings . The purpose of this work is lying on the validation of durability of a new coating by means of electrochemical, surface, and computational techniques .…”

Section: Introductionmentioning

confidence: 99%

“…[7,8] Accelerated aging tests are used to estimate the service life of polymer coatings. [9,10] The purpose of this work is lying on the validation of durability of a new coating by means of electrochemical, surface, and computational techniques. [11,12] The polymer coatings usually avoid the leaching of reactive (corrosive) species from electrolyte to metallic surface.…”

Section: Introductionmentioning

confidence: 99%

Highly durable macromolecular epoxy resin as anticorrosive coating material for carbon steel in 3% NaCl: Computational supported experimental studies

Dagdag

Berisha

Safi

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

The purpose of present study is in the direction of development of an anticorrosive coating formulation of high durability for carbon steel corrosion in 3 wt% NaCl medium. The formulation comprises of a macromolecular epoxy coating (DGEDDS‐MDA) based bisphenol S diglycidyl ether (DGEDDS) cured with a methylene dianiline (MDA). The formulation was characterized by FT‐IR spectroscopy method. Performance of the epoxy coating was represented using PDP and EIS approaches. The formulation acts as effective anticorrosive coating for long durability (180 days). Surfaces of the specimens before and after 180 days exposure to UV radiation were examined using SEM. PDP, SEM, and EIS studies showed that DGEDDS‐MDA acted as highly durable and effective anticorrosive formulation. Results also showed that the formulation acts as interface type inhibitor and its presence enhances the polarization resistance (Rp) value. DFT study suggests that the formulation DGEDDS‐MDA possesses strong ability to interact with metal surface through its several electron rich centers. MD and MC simulations showed that studied formulation effectively adsorb on the substrate (metallic surface). Results of EIS, PDP, and SEM studies (experimental) were well‐supported by DFT, MD, and MC (computational) simulations.

show abstract

“…[14] Accelerated aging tests are widely used to estimate the service life of polymer coatings. [15] We herein, developed as macromolecular epoxy resin based anticorrosive formulation designated as HGTEDPA-MDA, for carbon steel alloy in 3% NaCl medium. The formulation was employed as anticorrosive material for the first time and its anticorrosive property was demonstrated using PDP and EIS methods.…”

Section: Introductionmentioning

confidence: 99%

Designing of phosphorous based highly functional dendrimeric macromolecular resin as an effective coating material for carbon steel in NaCl: Computational and experimental studies

Dagdag

Harfi

Gana

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

Objective of this study is to develop a highly effective and durable phosphorus based epoxy resin as anticorrosive coating material for carbon steel in 3% NaCl medium. The hexaglycidyl N,N′,N″‐tris (4,4′‐ethylene dianiline) phosphoramide (HGTEDPA) was characterized using spectral methods. The anticorrosive formulation (HGTEDPA‐MDA) was synthesized using HGTEDPA curing with 4,4′‐methylenedianiline (MDA). The formulation (HGTEDPA‐MDA) coated steel specimens were exposed to UV radiation for a specific durable (189 days) and durability of the formulation was tested along with its inhibition effectiveness. The anticorrosive property of the formulation was evaluated using electrochemical (electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP)) methods. Results showed that HGTEDPA‐MDA coating improved the corrosion resistance value even after exposing 180 days to the UV radiation. PDP study suggested that HGTEDPA‐MDA before and after UV radiations acted as mainly anodic and cathodic type of inhibitor, respectively. The EIS and PDP results were corroborated with density functional theory (DFT) and molecular dynamic simulations (MDS) methods and a reasonable good agreement was observed. DFT study revealed that HGTEDPA‐MDA interacts with the metallic surface using donor–acceptor interactions. MDS study revealed that HGTEDPA‐MDA spontaneously interacts with steel surface and adsorb using horizontal orientation.

show abstract

Synthesis and application of mesoporous carbon nanospheres containing walnut extract for fabrication of active protective epoxy coatings

Cited by 36 publications

References 47 publications

Self-healing epoxy nanocomposite coatings based on dual-encapsulation of nano-carbon hollow spheres with film-forming resin and curing agent

Self-healing epoxy nanocomposite coatings based on dual-encapsulation of nano-carbon hollow spheres with film-forming resin and curing agent

Highly durable macromolecular epoxy resin as anticorrosive coating material for carbon steel in 3% NaCl: Computational supported experimental studies

Designing of phosphorous based highly functional dendrimeric macromolecular resin as an effective coating material for carbon steel in NaCl: Computational and experimental studies

Contact Info

Product

Resources

About