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Author published in"Progress in Organic Coatings"affiliate to

College of Science and Engineering

Yuan-Hsiang Yu

Department of Chemistry,

Fu Jen Catholic University, New Taipei City, Taiwan

Article published in 

"Progress in Organic Coatings" Volume 151, February 2021, 106052


Flexible epoxy graphene thermoset with excellent weather and corrosion resistance

The chemical-bonding-dispersed method was used to develop a functional graphene oxide/epoxy nanocomposite coating with multifunctional properties and long-term stability for anticorrosion and weather resistance purposes. This study compared relevant properties before and after ultraviolet (UV) irradiation of the chemical-bonding-dispersed nanocomposite, a physically blended composite, and a neat polymer by using Fourier-transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, ultraviolet aging, contact angle testing, electrochemical corrosion studies, dynamic mechanical analyzer testing, thermogravimetric analysis, flexibility testing, and an adhesion test. The as-prepared nanocomposite prevented the yellowing of epoxy resin, demonstrating the nanocomposite’s durability under UV light. Furthermore, the nanocomposite exhibited excellent anticorrosion properties. Anticorrosion performance with a corrosion rate of 6.10 × 10−3 mil/year and a corrosion efficiency of 99.99 % was attained with a thin-film coating of approximately 10 μm, and it retained a corrosion rate of 1.50 × 10-2 mil/year with a corrosion efficiency of 99.98 %. The results of the long-term durability tests performed using the electrochemical impedance spectrum indicated that the chemical-bonding-dispersed nanocomposite was superior to the physically blended dispersed composite and pure epoxy coating. The nanocomposite coating retained its high impedance over long-term durability tests, with a charge transfer resistance of 8.73 × 107 Ω·cm2 after 90 days. This study demonstrated the durability of the anticorrosion, mechanical, thermal, and degradation properties of the designed coating material before and after UV irradiation.[Full article]

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Keywords Polymer-matrix composites (PMCs) Graphene Corrosion Durability Environmental degradation

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