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In this work, a nanocomposite with active and passive corrosion protection performances was synthesized through a facile method. A metal organic framework (UIO-66) was chosen as the nanocontainer to encapsulate the corrosion inhibitor benzotriazole (BTA). Graphene oxide (GO) was utilized to act as a physical barrier. The active protection ability was achieved by two aspects. One is the pH-stimulated release of the loaded inhibitors from nanocontainers and the other is the passive film (ZrO2), which resulted from the disintegrated UIO-66 under alkaline conditions. The passive protection capacity was provided by the outstanding barrier property of GO.

Herein, a new strategy for improving anti-corrosion performance of epoxy coatings has been developed, which combined halloysite nanotubes (HNTs) with graphene oxide (GO). On one hand, the corrosion...

The oil spill and the illegal discharge of organic solvents not only cause the waste of resources but also damage to the ecological environment, so it is very important to deal with it immediately. In this paper, the natural sepiolite（SEP） was modified by vinyltriethoxysilane(VTES) and 3-chloropropyltriethoxysilane(CTES) to gain excellent hydrophobicity. Then the modified superhydrophobic sepiolite（MSEP） powder was loaded onto the three-dimensional polyurethane(PU) sponge by repetitive dipping and drying. The water contact angle of MSEP@PUsponge reached 155°, and its adsorption capacity for various oils and organic solvents was 26–71 times higher than its own weight. After 15 cycles of squeeze-adsorption, the adsorption capacity of MSEP@PUsponge just decreased slightly for n-hexane, rice oil, diesel oil and chloroform. Moreover, after continuous separation of the diesel and water mixture for 10 times, MSEP@PUsponge still showed hydrophobicity. At the same time, the prepared sponges showed excellent stability under extreme environment and good mechanical property after 200 compression cycles.

In this work, a superhydrophobic MgAl-layered double hydroxide with F− intercalation (LDH-F) was fabricated by a facile method and further modification by stearate (St) anions. Then, the composite was dispersed in the epoxy resin to prepare anti-corrosion coatings, which was applied for corrosion protection of Mg alloy. This kind of coatings protects Mg alloy from some aspects. Firstly, the superhydrophobic film impedes the water molecules penetrating into Mg substrate. Secondly, the superior anions exchange ability of LDH can be used to stockpile chloride ions and the release of fluorine ions can react with magnesium ions to form a magnesium fluoride (MgF2) protective film at the corrosion area of the Mg alloy. Lastly, the LDH itself layered structure is a physical barrier. The fabricated composites were comprehensively characterized with Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), water contact angle (CA) and scanning electron microscopy (SEM). Electrochemical Impedance Spectroscopy (EIS) was conducted to investigate the corrosion behavior of various composite coatings and the results demonstrated that the impedance modulus of the superhydrophobic layered double hydroxide epoxy (LDH-F-St-EP) coating reached 1.2 × 109 Ω cm2, showing excellent anti-corrosion performances.

A nanocomposite was fabricated with both excellent corrosion inhibitor encapsulating capacity and the ability of controlled delivery of benzotriazole (BTA) for simultaneously endowing coating systems with both active and passive anti-corrosion performances. The metal organic frameworks (MOFs) were synthesized and served as nanocontainers to load BTA. On this basis, tetraethyl orthosilicate (TEOS) was further added to form a film to wrap MOFs. The addition of TEOS endowed coatings with pH-responsive and active inhibition abilities, due to the film would break under acid or alkaline conditions. Moreover, the resultant compounds were further combined with graphene oxide (GO), cause GO had an superior barrier property and impermeability. On the other hand, there were abundant oxygen-containing functional groups on GO, which could be modified to improve the dispersion of GO in epoxy coatings. The fabricated nanocomposites were comprehensively characterized with Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric Analysis (TGA), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Ultraviolet-visible spectroscopy (UV–vis) test was utilized to estimate the release behavior of BTA. Electrochemical Impedance Spectroscopy (EIS) was performed to characterize the corrosion behavior of various composite coatings. Results demonstrated that the BTA-MOF-TEOS-GO incorporated into the epoxy coatings showed the highest impedance values up to 8.6 × 108 Ω cm2, indicating the most excellent and durable anti-corrosion properties.