Multi-action self-healing coatings with simultaneous recovery of corrosion resistance and adhesion strength
TL;DR: In this paper, a shape memory epoxy resin containing ethylene vinyl acetate (EVA) microspheres loaded with Ce(NO3)3 inhibitors was used for self-healing.
About: This article is published in Journal of Materials Science & Technology.The article was published on 2022-02-28. It has received 14 citations till now. The article focuses on the topics: Materials science & Epoxy.
Citations
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TL;DR: In this article , a smart coating integrating high-performance self-healing and sensitive self-reporting abilities was developed based on mesoporous SiO2 nanoparticles (MSN) containing both 1,10phenanthroline-5-amine (Phen-NH2) and cetyltrimethylammonium bromide (CTAB).
32 citations
TL;DR: An active corrosion protection coating was developed based on mesoporous SiO2 nanoparticles simultaneously incorporated with benzotriazole and 2-mercaptobenzothiazole inhibitors as mentioned in this paper .
15 citations
TL;DR: In this article , a dual-action self-healing coating with excellent photothermal response to both near-infrared (NIR) laser and sunlight irradiation was prepared, which was composed of a shape memory epoxy matrix embedded with poly (ε-caprolactone) (PCL) microspheres, the surface of which was covered by titanium nitride nanoparticles (TiN NPs) to achieve the superior photothermal conversion ability.
Abstract: In this work, a dual-action self-healing coating with excellent photothermal response to both near-infrared (NIR) laser and sunlight irradiation was prepared. The coating was composed of a shape memory epoxy matrix embedded with poly (ε-caprolactone) (PCL) microspheres, the surface of which was covered by titanium nitride nanoparticles (TiN NPs) to achieve the superior photothermal conversion ability. Upon light irradiation, the [email protected] composite microspheres could efficiently absorb light energy and generate sufficient heat to induce the shape memory recovery of coating defect as well as the melting of PCL to seal the scratch. Morphology observation and electrochemical measurements proved that the coating incorporated with 10 wt% of [email protected] microspheres presented an excellent self-healing performance under 30 s of NIR illumination to recover the barrier property. In addition, the photothermal conversion of [email protected] microspheres could accelerate the evaporation of water around the coating scratch, hence restraining the corrosion activity in the damaged region. The outdoor exposure test on the atmospheric corrosion monitor (ACM) covered by the coating confirmed that sunlight also benefited to achieve the prominent self-healing performance and shorten the water evaporation time, leading to much reduced corrosion current outputs hence improved corrosion protection property.
11 citations
TL;DR: In this paper , a smart coating with corrosion-sensing and self-healing dual functions was developed on carbon steel by incorporating the urea formaldehyde (UF) microcapsules loaded with 1,10-phenanthroline (Phen) molecules.
7 citations
TL;DR: In this article , the authors described the development of a polymer coating that binds alginates and multivalent cations and used cellulose nanofibers (CNF) of 1% to create pathways for the corrosion inhibitors sodium alginate (Alg) and calcium nitrite (CN).
3 citations
References
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25 Jul 2017
TL;DR: Wang et al. as mentioned in this paper summarized the findings that arose from the landmark "Study of Corrosion Status and Control Strategies in China", a key consulting project of the Chinese Academy of Engineering in 2015, which sought to determine the national cost of corrosion and costs associated with representative industries in China.
Abstract: Corrosion is a ubiquitous and costly problem for a variety of industries. Understanding and reducing the cost of corrosion remain primary interests for corrosion professionals and relevant asset owners. The present study summarises the findings that arose from the landmark “Study of Corrosion Status and Control Strategies in China”, a key consulting project of the Chinese Academy of Engineering in 2015, which sought to determine the national cost of corrosion and costs associated with representative industries in China. The study estimated that the cost of corrosion in China was approximately 2127.8 billion RMB (~ 310 billion USD), representing about 3.34% of the gross domestic product. The transportation and electronics industries were the two that generated the highest costs among all those surveyed. Based on the survey results, corrosion is a major and significant issue, with several key general strategies to reduce the cost of corrosion also outlined. It is estimated that the effects of corrosion in China cost approximately $310 billion USD in 2014. Corrosion is a costly issue, justifying substantial expenditure into techniques to protect and mitigate susceptible metals from its effects, and research investment. China has seen rapid growth in its economy in recent times, driven in part by investment in industry. In order to understand the monetary impact of corrosion in China, The Chinese Academy of Engineering instigated a nationwide study led by the Institute of Oceanology, Chinese Academy of Sciences. It estimates that approximately $310 billion USD was lost to the consequences of corrosion and money spent addressing it in 2014, accounting for 3.34% of GDP. Transportation and electronics industries generated the highest costs. Several recommendations are made, including the need for a government-coordinated national strategy.
631 citations
TL;DR: This current review will focus on developments in the area of dynamic polymers, as a class of dynamic materials presenting self-healing features and, more generally, the ability to undergo adaptation under the effect of physical and/or chemical agents, and thus function as adaptive polymers or ADAPTAMERS.
Abstract: Importing self-repair or self-healing features into inert materials is of great relevance to material scientists, since it is expected to eliminate the necessity of replenishing a damaged material. Be it material chemistry or more specifically polymer chemistry, such materials have attracted the imagination of both material scientists and chemists. A stroll down the memory lane 70 years back, this might have sounded utopian. However with the current progress in supramolecular chemistry and the emergence of dynamic covalent and non-covalent chemistries, novel perspectives have been opened up to materials science towards the development of dynamic materials (DYNAMATS) and in particular dynamic polymers (DYNAMERS), with the ability to produce such species by custom made designs. Chemistry took giant strides to gain control over the structure and features of materials and, besides basic progress, to apply it for tailor-making matter for applications in our daily life. In that applied perspective, materials science plays a paramount role in shaping our present and in contributing to a sustainable future. The goal is to develop materials, which would be dynamic enough to carry out certain functions as effectively as in biological systems with, however, the freedom to recruit the powers of chemistry on a wider scale, without the limitation imposed by life. Material scientists and in particular polymer chemists may build on chemistry, physics and biology for bridging the gap to develop dynamic materials presenting a wide range of novel functionalities and to convert dreams into reality. In this current review we will focus on developments in the area of dynamic polymers, as a class of dynamic materials presenting self-healing features and, more generally, the ability to undergo adaptation under the effect of physical and/or chemical agents, and thus function as adaptive polymers or ADAPTAMERS.
529 citations
TL;DR: A comprehensive and updated review on the advantages and limitations associated with common autonomous and non-autonomous self-healing mechanisms in protective organic coatings used for anti-corrosion purposes is provided in this article.
439 citations
TL;DR: In this paper, a self-healing superhydrophobic coating based on dual actions by the corrosion inhibitor benzotriazole (BTA) and an epoxy-based shape memory polymer (SMP) was introduced.
Abstract: This work introduces a new self-healing superhydrophobic coating based on dual actions by the corrosion inhibitor benzotriazole (BTA) and an epoxy-based shape memory polymer (SMP). Damage to the surface morphology (e.g., crushed areas and scratches) and the corresponding superhydrophobicity are shown to be rapidly healed through a simple heat treatment at 60 °C for 20 min. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) were used to study the anti-corrosion performance of the scratched and the healed superhydrophobic coatings immersed in a 3.5 wt% NaCl solution. The results revealed that the anti-corrosion performance of the scratched coatings was improved upon the incorporation of BTA. After the heat treatment, the scratched superhydrophobic coatings exhibited excellent recovery of their anti-corrosion performance, which is attributed to the closure of the scratch by the shape memory effect and to the improved inhibition efficiency of BTA. Furthermore, we found that the pre-existing corrosion product inside the coating scratch could hinder the scratch closure by the shape memory effect and reduce the coating adhesion in the scratched region. However, the addition of BTA effectively suppressed the formation of corrosion products and enhanced the self-healing and adhesion performance under these conditions. Importantly, we also demonstrated that these coatings can be autonomously healed within 1 h in an outdoor environment using sunlight as the heat source.
376 citations
TL;DR: In this article, shape memory assisted self-healing (SMASH) coatings are proposed to deal with structural and functional damage to a poly(e-caprolactone) fiber.
Abstract: In this communication, we report the preparation and characterization of new shape memory assisted self-healing (SMASH) coatings. The coatings feature a phase-separated morphology with electrospun thermoplastic poly(e-caprolactone) (PCL) fibers randomly distributed in a shape memory epoxy matrix. Mechanical damage to the coating can be self-healed via heating, which simultaneously triggers two events: (1) the shape recovery of the matrix to bring the crack surfaces in spatial proximity, and (2) the melting and flow of the PCL fibers to rebond the crack. In controlled healing experiments, damaged coatings not only heal structurally, but also functionally by almost completely restoring the corrosion resistance. We envision the wide applicability of the SMASH concept in designing the next-generation self-healing materials.
320 citations