Boron nitride-epoxy inverse “nacre-like” nanocomposite coatings with superior anticorrosion performance

Zhao, Hongran; Ding, Jiheng; Liu, Panlin; Yu, Haibin

doi:10.1016/j.corsci.2021.109333

Cited by 66 publications

(26 citation statements)

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“…Figure a–d shows the Bode impedance and Bode phase plots of different steel samples when soaked in 3.5 wt % NaCl solution for 4 weeks. In view of previous reports, − the modulus ( Z 0.01Hz ) of steels at the lowest frequency in the Bode-impedance plots was applied to assess the protection ability of coatings. The Z 0.01Hz plots of EP and IL-BN-EP protected steels are shown in Figure e.…”

Section: Resultsmentioning

confidence: 99%

“…In order to deeply analyze the corrosion behaviors, EIS results were further fitted through the ZSimpWin software according to the corresponding electrical equivalent circuits (EECs) in Figure a,b. In the EECs models, the R s , R c , and R ct represent the solution resistance, coating capacitance, and charge-transfer resistance, while the Q c and Q dl represent coating capacitance and double-layer capacitance, respectively. , Model 1 in Figure a is employed to fit the corrosion process of the coatings without aggressive species penetration and corrosion occurrence like pure EP for 1 day of immersion and IL-BN-EP coating . In the case of EP, the aggressive species have penetrated throughout the coating matrix to contact the coating–steel interface after 7 days of immersion, while the EEC varieties were for model 2 (Figure b) .…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of Ultrathin Functional Boron Nitride Nanosheets and Their Application in Anticorrosion

Zhang

et al. 2021

ACS Appl. Nano Mater.

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Hexagonal boron nitride (hBN) shows huge promise for metallic corrosion protection due to its excellent impermeability. However, the exfoliation and dispersion of hBN have proven to be very challenging, owing to the strong "lip−lip" interactions and inherent hydrophobic features. Herein, ultrathin IL-BN nanosheets were synthesized and simultaneously noncovalent functionalized by ionic liquid (IL) through a liquid ball milling strategy to achieve the good compatibility with epoxy (EP), which was characterized by scanning electron microscope (SEM), transmittance electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectronic spectroscopy (XPS), and UV−vis absorbance spectroscopy. Electrochemical measurements confirmed that the addition of 0.5 wt % IL-BN into the EP matrix significantly enhanced the anticorrosion capability of coatings. After 4 weeks of immersion in 3.5 wt % NaCl solution, the IL-BN-EP coating remained with a high coating resistance R c of 5.6 × 10 9 Ω cm 2 , 4 orders of magnitude higher than EP (4.9 × 10 5 Ω cm 2 ). SEM and Raman measurements also corroborated that the steel protected by IL-BN-EP was hardly corroded. Moreover, the passivation effect of IL-BN-EP coating was confirmed by potential polarization curve (PPC) tests at the coating defects. The superior anticorrosion performance of IL-BN-EP coating was mainly attributed to the synergistic effect of physical barrier and self-healing property endowed by the well-dispersed IL-BN hybrids.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synthesis of Ultrathin Functional Boron Nitride Nanosheets and Their Application in Anticorrosion

Zhang

et al. 2021

ACS Appl. Nano Mater.

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“…The R p values of IL@MXene–WEP coating specimens were 1 or 2 orders of magnitude higher than those of the neat WEP after 10 days of immersion in 3.5 wt % NaCl (aq) , demonstrating the availability of IL@MXene nanosheets in improving the corrosion protection of the WEP coating. Encouragingly, the R p value of the IL@MXene 0.5 coating increased by ∼11,000% compared to that of the neat WEP, which was mainly attributed to the exceptional barrier property (as confirmed in Figure g,h) originated from the well-dispersed IL@MXene nanosheets in the coating matrix. − …”

Section: Results and Discussionmentioning

confidence: 88%

“…During the initial immersion for 1 day of, there is no obvious difference in the W up values for the coatings. W up of the neat WEP sharply increased after 2 days of immersion because of the rapid water absorption stage, 35 implying the rapid failure of physical barrier property. After 10 days of immersion, the W up value of the neat WEP reached a saturation stage with the maximum value of 9.2%.…”

Section: Resultsmentioning

confidence: 99%

“…All electrochemical measurements were repeated three times to obtain reliable values. The potential signals were converted into the local current density ( j ) according to the Ohm’s law, as follows − where Δφ is the electric potential difference, k is the electrolyte conductivity, and d is the vibration amplitude, respectively.…”

Section: Experimental Sectionmentioning

confidence: 99%

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Air-Stable Titanium Carbide MXene Nanosheets for Corrosion Protection

Zhao

Ding

Zhou

et al. 2021

ACS Appl. Nano Mater.

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MXene materials have drawn extensive scientific interest in catalysis, batteries, purification, and electromagnetic interference shielding fields; however, their anticorrosion performance is rarely explored mainly because MXene nanosheets are prone to be oxidized under ambient conditions. Herein, we prepared oxidation-resistant and highly stable titanium carbide (Ti3C2T x ) MXene sheets through noncovalent functionalization between MXene and an ionic liquid (IL). The resultant IL@MXene nanosheets were used as a smart barrier enhancer of waterborne epoxy (WEP) to improve the anticorrosion performance of coatings. The impedance modulus of the IL@MXene–WEP coatings with a thickness of 13 μm increased by 1–2 orders of magnitude compared to that of the neat WEP coating, which was supported by potentiodynamic polarization curves and electrochemical impedance spectroscopy measurements. The morphologies of steels protected by the IL@MXene–WEP coatings exhibited less corrosion than the neat WEP, suggesting a satisfactory anticorrosion performance enhancement by the coating. Furthermore, the self-healing properties of the IL@MXene–WEP coating were confirmed using the scanning vibrating electrode technique. Its enhanced protection performance was attributed to the synergistic effects of the exceptional barrier property endowed by well-dispersed MXene nanosheets and the self-repairing property caused by IL passive films. Our work provides a strategy for the design and preparation of MXene smart anticorrosion coatings.

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High‐Strength, High‐Barrier Bio‐Based Polyester Nanocomposite Films by Binary Multiscale Boron Nitride Nanosheets

Ding,

Zhao,

Shi

et al. 2023

Adv Funct Materials

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Owing to the inferior dispersibility of boron nitride nanosheets (BNNSs) and weak interfacial interaction with the matrix, the performance of BNNS‐based composites is usually far below theoretically predicted values. Here, binary multiscale BNNSs (LDH‐BNNSs) fillers are synthesized through in situ growth of layered double hydroxide (LDH) on the BNNSs’ surfaces. LDH‐BNNSs with a multiple mosaic interface show superior dispersion of nanosheets in matrix and extraordinary filler‐matrix bonding. Density functional theory simulations reveal the stable dispersion mechanism of LDH‐BNNSs. Moreover, the bio‐based poly(ethylene furandicarboxylate) composites with 0.2 wt% LDH‐BNNSs loading exhibit simultaneous improvements in tensile strength (≈140 MPa), Young's modulus (≈6.5 GPa), toughness (≈2.0 MJ m−3), and gas barrier properties. Regulation of the interfacial structures of binary multiscale BNNSs significantly increases the filler utilization of the nanosheets, leading to extraordinary stress transfer efficiency and a physical shielding effect. Therefore, this simple, efficient, and novel strategy has promised in enhancing composite performance, and it provides a novel way to develop strong, tough, and high‐barrier bio‐based polyester composites.

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Boron nitride-epoxy inverse “nacre-like” nanocomposite coatings with superior anticorrosion performance

Cited by 66 publications

References 50 publications

Synthesis of Ultrathin Functional Boron Nitride Nanosheets and Their Application in Anticorrosion

Synthesis of Ultrathin Functional Boron Nitride Nanosheets and Their Application in Anticorrosion

Air-Stable Titanium Carbide MXene Nanosheets for Corrosion Protection

High‐Strength, High‐Barrier Bio‐Based Polyester Nanocomposite Films by Binary Multiscale Boron Nitride Nanosheets

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