Abstract
Scaling is an ineluctable challenge facing humanity in industrial production. Although superhydrophobic coatings have been proven to possess anti-scaling effects, they are generally limited by fragile mechanochemical durability. Herein, a thermoplastic polyurethane (TPU)/polyvinylidene fluoride (PVDF)/microcapsules (MCs)/nanocarbon fiber (CNF) composite coating with superhydrophobicity (water contact angle of 155°) and superoleophilicity (oil contact angle of 0°) has been successfully prepared by spraying method. The scale inhibitor of EDTA-Zn was encapsulated in polyurea@SiO2 shell via Pickering emulsion polymerization route. Owing to the sustained release of EDTA-Zn and the shielding oil layer formed by capturing oil molecules, the prepared coating is capable of inhibiting the adhesion of CaCO3 scale nucleation and inducing the growth of aragonite CaCO3 scale, which is more likely to detach from the coating surface compared to calcite. Thus, in simulated oil field production fluid, the prepared coating demonstrated excellent anti-scaling property with an extremely low CaCO3 deposited weight of 0.072 mg/cm2. Simultaneously, because of the stable shielding oil film on the coating surface, the prepared coating exhibited excellent corrosion resistance, with a low Icorr of 7.39 × 10−9 A/cm2 and a corrosion rate of 8.06 × 10−5 mm/year. In addition, the prepared coating also shown excellent mechanical durability, anti-fouling and self-cleaning qualities. We anticipate that our work will offer a new approach to the development and production of industrial anti-scaling and anti-corrosion coatings.
Published Version
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