Corrosion self-diagnosing and self-repairing polymeric coatings based on zeolitic imidazolate framework decorated hydroxyapatite nanocontainer on steel

Liu, Cheng-Bao; Cheng, Li; Cui, Lan-Yue; Qian, Bei; Zeng, Rong‐Chang

doi:10.1016/j.cej.2021.133476

Cited by 18 publications

(8 citation statements)

References 51 publications

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“…The coating surfaces and cross-section morphologies are relatively smooth and uniform (Figure S4c,d), indicating fine interfacial interactions between the nanocontainers and epoxy coatings. The enhanced interfacial bonding improves the physical barrier of the coatings . The coating measured thicknesses of the epoxy-PPy and epoxy-PPy-Zn coatings are measured at about 146 and 151 μm, respectively.…”

Section: Results and Discussionmentioning

confidence: 97%

“…The enhanced interfacial bonding improves the physical barrier of the coatings. 45 The coating measured thicknesses of the epoxy-PPy and epoxy-PPy-Zn coatings are measured at about 146 and 151 μm, respectively. The high thickness and uniform distribution of the PPy nanocapsules can effectively block the penetration paths of corrosive species and enhance the barrier capability.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Double Stimuli-Responsive Conducting Polypyrrole Nanocapsules for Corrosion-Resistant Epoxy Coatings

Chen

Gong

et al. 2022

ACS Appl. Mater. Interfaces

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Stimuli-responsive nanocapsules, which can respond to various environmental stimuli and release their encapsulated payload on demand, have attracted wide interest in different fields in recent years. In this work, a novel kind of polypyrrole (PPy) nanocapsules is fabricated and loaded with zinc salt corrosion inhibitors. The synthesized PPy nanocapsules respond to two different external stimuli (pH-and redox-responsive) and can control the release of their encapsulated corrosion inhibitors. The nanocapsules can detect the microenvironmental pH or surface-potential changes associated with the corrosion initiation of the metal substrate. When introduced into a protective epoxy coating, the fabricated PPy nanocapsules inhibit the anodic and cathodic corrosion reactions. The superior corrosion resistance and active corrosion protection effects of the epoxy-PPy-Zn coatings are further demonstrated via electrochemical and long-term immersion tests. The low-frequency impedance, coating resistance, and oxide film resistance increase after about 400 h of exposure in a 3.5 wt % NaCl solution, reflecting the enhanced corrosion protection properties and excellent repairing performance of the coating. Furthermore, the epoxy-PPy-Zn coating can avoid the pitting corrosion of 304 stainless steel. Overall, we have fabricated double stimuli-responsive PPy nanocapsules via a simple and effective strategy and incorporated them into a corrosion-resistant epoxy coating for protecting Fe-based metal substrates.

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Section: Results and Discussionmentioning

confidence: 97%

Section: ■ Results and Discussionmentioning

confidence: 99%

Double Stimuli-Responsive Conducting Polypyrrole Nanocapsules for Corrosion-Resistant Epoxy Coatings

Chen

Gong

et al. 2022

ACS Appl. Mater. Interfaces

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“…This approach uses detection methods such as changes in color and sol-gel transitions, changes in shape and stretchability, and other physical changes that are visible to the naked eye. [1][2][3][4][5] However, current detection methods, such as surface-enhanced Raman scattering (SERS), surface plasmon resonance (SPR), and photoacoustic (PA) imaging-based detection, suffer from problems such as long signal collection time and require specialized equipment. [6][7][8] Hence, a self-reporting platform that resolves the challenges faced by current detection techniques while enabling easy-to-use cancer diagnostics is a necessity.…”

Section: Introductionmentioning

confidence: 99%

A Self‐Reporting Mineralized Conductive Hydrogel Sensor with Cancer‐Selective Viscosity, Adhesiveness, and Stretchability

Roy

Lee

Ryplida

et al. 2023

Adv Funct Materials

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A cancer‐selective self‐reporting sensor based on a redox‐responsive mineralized conductive hydrogel (M‐Hydrogel) is proposed with cancer‐specific viscosity, adhesive strength, stretchability, tunable conductivity, and fluorescence. The redox‐triggered release of carbonized polydopamine (cPDA) from the loaded disulfide‐crosslinked polymer dots (PD@cPDA) in the hydrogel matrix modulates the macroporous structure responsible for self‐recognizable cancer sensing and photothermal activity for cancer therapy. The self‐reporting nature of the M‐Hydrogel sensor is highlighted when in vicinity of a high glutathione (GSH) level owing to the controllable pore size and H‐bonding by cPDA, as confirmed by experiments on cancer cells (HeLa, PC3, B16‐F10‐GFP, and SNU‐C2A) and normal cells (CHO‐K1). The lower viscosity during syringe test along with the exceptional adhesiveness and stretchability with various cancer cells, combined with a high wireless pressure‐sensing response absent in normal conditions, confirms the dependence of self‐recognizable behavior on the cancer microenvironment. The M‐Hydrogel demonstrates excellent ex situ sensing with tumor ablation, after implantation in mice xenografted with HeLa cells, with the wireless sensing system, enabling real‐time analysis coupled with the upregulation of pro‐apoptotic markers P53 and BAX in the tumor. Therefore, this self‐reporting sensor may facilitate a strategy for innovative and convenient cancer diagnostics.

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“…8 When the coating is damaged, the internal healing or chromogenic agents are released to facilitate self-healing 9 and corrosion diagnosing. 10 This method is simpler and more efficient and provides an effective solution for marine coating damage.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, there is increasing interest in corrosion-diagnosing coatings that visibly show damage through coloration. , One promising approach is using intelligent organic coatings with nanocontainers that encapsulate healing or chromogenic agent . When the coating is damaged, the internal healing or chromogenic agents are released to facilitate self-healing and corrosion diagnosing . This method is simpler and more efficient and provides an effective solution for marine coating damage.…”

Section: Introductionmentioning

confidence: 99%

Synergetic Inhibition and Corrosion-Diagnosing Nanofiber Networks for Self-Healing Protective Coatings

Cao,

Wang,

Cheng

et al. 2023

ACS Appl. Mater. Interfaces

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Organic coatings lack durability in marine corrosive environments. Herein, we designed a self-healing coating with a novel nanofiber network filler for enhanced protection. Using electrospinning, we created a core−shell structure nanofiber network consisting of polyvinyl butyral (PVB) as the shell material and gallic acid (GA) and phenanthroline (Phen) as the core material. The PVB@GA-Phen nanofiber network, which includes synergistic corrosion inhibitors (GA-Phen), was embedded in an epoxy coating (PVB@GA-Phen/epoxy) and applied to carbon steel. Density functional theory (DFT) calculations and molecular dynamics (MD) simulations demonstrated that the GA-Phen combination, through hydrogen bond interaction, facilitated inhibitor adsorption on the steel surface. The GA-Phen combination diagnosed corrosion and formed a protective film on the scratched areas. The sustained release of Phen-GA combination inhibitors for up to 240 h resulted in an 88.63% healing efficiency of the PVB@GA-Phen/ epoxy (PGP/EP) coating. The long-term corrosion resistance tests confirmed the effective barrier performance of the PGP/EP coating in 3.5 wt % NaCl solution. Moreover, the incorporation of the nanofiber network in the epoxy coating provided passive barrier, corrosion-diagnosing, and anticorrosion properties for carbon steel protection. The designed coating has the potential to continuously monitor the coating/metal system and could serve as a foundation for developing new anticorrosion coatings.

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Corrosion self-diagnosing and self-repairing polymeric coatings based on zeolitic imidazolate framework decorated hydroxyapatite nanocontainer on steel

Cited by 18 publications

References 51 publications

Double Stimuli-Responsive Conducting Polypyrrole Nanocapsules for Corrosion-Resistant Epoxy Coatings

Double Stimuli-Responsive Conducting Polypyrrole Nanocapsules for Corrosion-Resistant Epoxy Coatings

A Self‐Reporting Mineralized Conductive Hydrogel Sensor with Cancer‐Selective Viscosity, Adhesiveness, and Stretchability

Synergetic Inhibition and Corrosion-Diagnosing Nanofiber Networks for Self-Healing Protective Coatings

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