pH-sensitive microcapsules based on biopolymers for active corrosion protection of carbon steel at different pH

Cunha, Ana Beatriz Marques da; Leal, Débora Abrantes; Santos, Luzia Rejane Lisbôa; Riegel‐Vidotti, Izabel C.; Marino, Cláudia Eliana Bruno

doi:10.1016/j.surfcoat.2020.126338

Cited by 29 publications

(9 citation statements)

References 44 publications

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“…Thus, the release of corrosion inhibitors in acidic conditions were achieved by protonation of unreacted primary amine groups in poly(urea-formaldehyde) microcapsules, [115,116] chitosan nanocapsules, [121,123,124] chitosan nanofibers, [97] and chitosan/alginate multilayered microcapsules. [107] Secondary and tertiary amine groups in polyaniline [104] and crosslinked poly(2-(dimethylamino)ethyl methacrylate) P(DMAEMA) [108] microcapsules were protonated upon exposure to acidic conditions, resulting in the swelling of polymer chains of the shell wall.…”

Section: Ph-responsive Materialsmentioning

confidence: 99%

Corrosion‐Responsive Self‐Healing Coatings

2023

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Organic coatings are one of the most popular and powerful strategies for protecting metals against corrosion. They can be applied to in different ways, such as by dipping, spraying, electrophoresis, casting, painting, or flow coating. They offer great flexibility of material designs and cost effectiveness. Moreover, since about 20 years self‐healing has evolved as a new research topic for protective organic coatings. Responsive materials play a crucial role in this new research field. However, for a really targeted development of high performance self‐healing coatings for corrosion protection, it is not sufficient just to focus on smart responsive materials and suitable active agents for self‐healing. A better understanding of how coatings can react on different stimuli induced by corrosion, how these stimuli can spread in the coating and how the released agents can reach the corroding defect is also of high importance. Such knowledge would allow to design coatings which are optimised for specific applications. Herein, the requirements and possibilities from the corrosion and synthesis perspectives for designing materials for preparing self‐healing coatings for corrosion protection are discussed.This article is protected by copyright. All rights reserved

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Section: Ph-responsive Materialsmentioning

confidence: 99%

Corrosion‐Responsive Self‐Healing Coatings

2023

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“…[2,3] However, suitable chemical or non-chemical (blending, inorganic/organic additives) modifications and processing of the biomaterials are mandatory to improve the overall physical, chemical, mechanical, and practical usability of the biopolymers. [4][5][6] The blending of biopolymers with synthetic polymers is a conventional route to improve the chemical and mechanical properties of biopolymers. [3,7] The dispersion of inhibitors, and inorganic/organic nanostructures (fibers, nanoparticles, sheets) have also been reported to improve the physicomechanical and corrosion protection abilities.…”

Section: Introductionmentioning

confidence: 99%

Mn(II)‐ and Zn(II)‐ Based Nanocomposites Metallopolymer for Corrosion Protective Coatings

et al. 2023

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The transition from conventional polymeric material to green and sustainable, environment-friendly biomaterials has been actively explored. The objective of the work involves the formulation of an oleo-polymer (corn oil, CO), hybridization with metallic ions (Zn 2 + and Mn 2 + ) through coordination bonding, study of the impact of fully/half-filled d-orbitals, and development of eco-friendly polymeric coating material. The formation of the nanoclusters (10-20 nm) within the polymeric matrix was estimated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Fourier transform infrared (FTIR) analysis supports the predicted chemical mech-anism involved during poly-urethanation of the metal-containing CO fatty amides. Interestingly, opposite to our expectations the metal ions with fully filled d-orbital (Zn 2 + ) showed relatively (Mn 2 + ) better thermal and anti-corrosion properties. The good adhesive strength of metallopolymers and the impact of the dorbital electrons on the corrosion protective performance, which was by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP). These nanocomposite coatings could be a suitable alternatives to petrochemicalbased polymers.

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“…Different functional microcapsules can be obtained by changing the types of core and shell materials. 34–39 Among them, the core material inside the microcapsule can stably store the polar/conductive liquid that excites interactive ACEL luminescence, and the compressive strength, corrosion resistance, heat resistance and other properties of the shell material provide interactive conditions. Once the conditions (pressure, pH, and temperature) under which the shell material deforms or breaks are reached, the functional liquid inside the core material can be released to realize the visual monitoring effect.…”

Section: Introductionmentioning

confidence: 99%