Effect of silane-modified SiO2@Ce3+ nanoparticles on the mechanical property and anti-corrosion for steel of the epoxy coating

In this work, nano-SiO2 have been used as nanocarriers for loading Ce(III) ions (SiO2@Ce3+). After loading, silane coupling agent has been used to modify these nanocarriers (m-SiO2@Ce3+). Then, these modified nanocarriers were added as green inhibitors into the inner epoxy coating matrix, which was based on the epoxy resin (DER 671X75) and hardener (polyamide Epicure 3125). Morphological study by FE-SEM showed that the spherical nanoparticles (mSiO2@Ce3+) were in size < 100 nm and dispersed rather homogeneously into the polyme matrix.
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Effect of silane-modified SiO2@Ce3+ nanoparticles on the mechanical property and anti-corrosion for steel of the epoxy coatingCite this paper: Vietnam J. Chem., 2023, 61(S3), 109-115 Research ArticleDOI: 10.1002/vjch.202300060 Effect of silane-modified SiO2@Ce3+ nanoparticles on the mechanical property and anti-corrosion for steel of the epoxy coating Nguyen The Huu1, Dam Thi Tam1,2, Do Truc Vy3, Nguyen Tuan Anh3, Le Trong Lu3, Tran Dai Lam3, Nguyen Thien Vuong3* 1 Faculty of Chemical Technology, Hanoi University of Industry, 296 Cau Dien, Minh Khai, Bac Tu Liem, Hanoi 10000, Viet Nam 2 Hanoi Irradiation Center, Vietnam Atomic Energy Institute, 2PXV+473, Highway 32, Minh Khai, Bac Tu Liem, Hanoi 10000, Viet Nam 3 Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Viet Nam Submitted February 18, 2023; Revised June 20, 2023; Accepted July 20, 2023Abstract In this work, nano-SiO2 have been used as nanocarriers for loading Ce(III) ions (SiO2@Ce3+). After loading, silanecoupling agent has been used to modify these nanocarriers (m-SiO2@Ce3+). Then, these modified nanocarriers wereadded as green inhibitors into the inner epoxy coating matrix, which was based on the epoxy resin (DER 671X75) andhardener (polyamide Epicure 3125). Morphological study by FE-SEM showed that the spherical nanoparticles (m-SiO2@Ce3+) were in size < 100 nm and dispersed rather homogeneously into the polyme matrix. In addition, theaddition of nanocarriers at a concentration of 2.5 wt.% into the epoxy polymer matrix enhanced significantly itsmechanical property. Besides, the anticorrosion performance of the epoxy polymer matrix due to the presence of m-SiO2@Ce3+ (at 2.5 wt. %) was proved by EIS analysis and salt spray tests. Keywords. Nano-SiO2 , Ce3+, silane, epoxy, corrosion.1. INTRODUCTION boosted the adhesion, water adsorption, blistering performance and substrate protection of waterborneEpoxy coating has been widely to protect metals epoxy coatings.againt corrosion, due to good processability, low Recently, researchers are focusing on the smartproduction cost, high chemical resistance, good organic coatings for anticorrosion with smartdielectric, and strong adhesion to metallic surface.[1- inhibitors- loaded nanocontainers/nanocarriers. This3] However, the cracking reactions of the epoxy new approach was the combination of nanoparticlescoating during the initiation and propagation steps (nanocontainers/nanocarriers) with corrosionlimit its application.[4] To overcome this issue, inhibitors. As reported, various inorganic nano-oxidesadding nanoparticles as nanofillers into epoxy resin (zirconi dioxide, titania, silica, nanotubes,...) havehave been developped.[5-9] As reported, the presence been used as nanocontainer for encapsulation ofof nanoparticles in the epoxy matrix enhanced both corrosion inhibitors.[17-19] Among these imorganicits barrier effect for anti-corrosion[9-12] and inhibition nanocontainers, silica nanocontainer is assumably theof trend to blister or delaminate.[13] In this direction, most promising candidate applied in the smartwe found the presence of various nanoparticles organic coating due to its dual functions: (i) as an(SiO2, Zn, Fe2O3, clay) in epoxy coating has effective filler at the nanoscale[20,21], and (ii) as aneffectively minimized the rate of epoxy-coated steel excellent nano-sized container controllable withbeing corroded up to 11-910 times in 3 wt. % pH.[18] On this direction, we reported the effect of theNaCl solution.[14] novel Ce-loaded silica nanoparticles (SiO2@Ce3+) in To further improve the corrosion performance of the epoxy nanocomposite coating on the anticorrosionepoxy coating, other approach of using corrosion protection of carbon steel.[22] Our EIS results showedinhibitors as additives has been proposed.[1,15,16] that the presence of SiO2@Ce3+ nanocontainersGalliano and Landolt[1] indicated that modification increased not only the coating resistance but also theby corrosion inhibiting additives significantly polarization resistance of the paint coating. Addition109 Wiley Online Library © 2023 Vietnam Academy of Science and Technology, Hanoi & Wiley-VCH GmbH ...