Preparation of self‐healing hydrophobic coating and its anticorrosion property

Ma, Conghuan; Li, Jiahong; Wang, Yunlong; Bian, Da; Zhao, Yongwu

doi:10.1002/pen.25927

Cited by 11 publications

(7 citation statements)

References 33 publications

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“…As shown in Table 1, Tafel extrapolation method was used to calculate the values of corrosion potential (E corr ) and corrosion current density ( I corr ). And the coating protective efficiency (PE) was obtained based on the following formula [ 40–42 ] :

PE = \frac{I_{corr}^{normalb} - I_{corr}^{normalc}}{I_{corr}^{b}} \times 100 %

…”

Section: Resultsmentioning

confidence: 99%

Preparation of polyaniline/cellulose nanofiber composites with enhanced anticorrosion performance for waterborne epoxy resin coatings

Zhao

Huang

Gao

et al. 2023

Polymer Engineering & Sci

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In this work, polyaniline-cellulose nanofiber (PANI-CNF) nanocomposites were prepared by in-situ polymerization of aniline on 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) oxidized CNFs. Fourier transform infrared spectroscopy and transmission electron microscope demonstrate the successful polymerization of aniline on CNFs. The PANI-CNF nanocomposites were added as nanofillers to waterborne epoxy resin (WER) in different proportions. The composite coatings with different contents of PANI-CNFs were prepared by fabricating the mixture on the Q235 steel sheets. The corrosion resistance of different coatings was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy. The results confirmed that composite coatings containing 0.5% PANI-CNF exhibit the optimum anticorrosion behaviors and best corrosion resistance, which shows the lowest corrosion current density (1.788 Â 10 À7 A/cm À2 ) and highest corrosion potential (À0.458 V). In addition, PANI-CNF can significantly enhance the anticorrosion performance of WER coatings and maintain a high value even after 40 days of immersion in NaCl solutions. The above performances are attributed to the synergistic effect of the barrier effects and the passivation mechanism. Therefore, the bio-based composite materials developed in this work are promising in enhancing the corrosion protection of mild steel, which is essential for the sustainable development of waterborne coatings.

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PE = \frac{I_{corr}^{normalb} - I_{corr}^{normalc}}{I_{corr}^{b}} \times 100 %

…”

Section: Resultsmentioning

confidence: 99%

Preparation of polyaniline/cellulose nanofiber composites with enhanced anticorrosion performance for waterborne epoxy resin coatings

Zhao

Huang

Gao

et al. 2023

Polymer Engineering & Sci

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“…This is due to the fact that the presence of microcapsules reduces the mechanical properties of the coating. 32 However, it is interesting to observe that the hardness of the coating shows an increasing trend with an increase in microcapsule content. Even the hardness of MC-PT 1.0 @CBPC and MC-PT 1.5 @ CBPC is greater than that of CBPC without microcapsules, with an increase of 2.13% and 6.21%, respectively.…”

Section: Phase Morphology Hardness Bonding Strength and Wettability O...mentioning

confidence: 99%

In Situ Polymerized Self-Healing Microcapsules as Multifunctional Fillers toward Phosphate Ceramic Coatings

Wang,

Wu,

Huang

et al. 2024

ACS Appl. Mater. Interfaces

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The protective efficacy of chemically bonded phosphate ceramic coatings (CBPC) is notably diminished owing to the presence of micropores and inadequate self-healing capacity in prolonged corrosive environments. Consequently, it is imperative to augment the corrosion and wear resistance of phosphate ceramic coatings while imbuing them with self-healing capabilities. In this work, a novel self-healing phosphate ceramic coating (MC-PT x @CBPC, x = 0.5, 1.0, 1.5) is designed by ureaformaldehyde (UF) in situ polymerization of nanoscale microcapsules encapsulated with 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) and evaluated in detail for corrosion and wear resistance. The corrosion inhibition efficiencies of all formulated MC-PT x @CBPC (x = 0.5, 1.0, 1.5) coatings exceed 90%, with the impedance modulus at the lowest frequency (| Z| f=0.01 ) showing enhancements of 1−2 orders of magnitude compared to pure CBPC. Moreover, the self-healing function becomes active during prolonged immersion. This can be primarily ascribed to the formation of a unique micronanostructure facilitated by nanoscale microcapsules and micrometer-sized alumina ceramics, bonded via the AlPO 4 phase. This structure enhances both the hydrophobicity and the bonding strength of the coating. Specifically, following prolonged immersion, the encapsulated PFDTES is liberated from the microcapsules, undergoing hydrolysis and subsequent polymerization upon contact with the electrolyte to form a protective thin film. This film efficiently obstructs the ingress of corrosive agents. Furthermore, the special micronanostructure enhances the hardness of the coating and the releasing PFDTES can form a lubricating film at the interface of abrasion, thus reducing the wear rate and friction coefficient of the MC-PT x @CBPC (x = 0.5, 1.0, 1.5). Therefore, MC-PT x @CBPC (x = 0.5, 1.0, 1.5) possesses excellent corrosion protection, tribological properties, and self-healing capabilities, which provide thought-provoking ideas for phosphate ceramic coatings to protect metals in harsh environments.

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“…The stability of the material is of great importance for practical applications. 35,36 Figure 7A,B shows the water droplet adsorption-desorption experiments for the original SSM and C-60-M respectively, where C-60-M was tested experimentally after storage for 1 week.…”

Section: Stabilitymentioning

confidence: 99%

Cellulose acetate superhydrophobic coatings for efficient oil–water separation using a combination of electrostatic spraying and chemical vapor deposition

Fang,

Li,

Feng

et al. 2023

Polymer Engineering & Sci

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The efficient and simple separation of oil–water mixtures has been a global challenge due to the growing problem of oily wastewater. To address this issue, various materials with special wetting properties and functionality have been developed in the past decades for oil–water separation. In this study, a superhydrophobic cellulose acetate (CA) functional coating was prepared by electrostatic spraying of CA and chemical vapor deposition of methyltrichlorosilane (MTCS) on a stainless steel mesh (SSM). Water contact angle in air (WCA) of the resulting coating is154° or more, and oil under water contact angle (UWOCA) is 0°. Simultaneously, the separation flux of the resulting coating for oil–water mixtures is as high as 23977.77 L·m−2·h−1, with separation efficiencies exceeding 99%. Due to its excellent water repellency, the CA functional coating can effectively separate oil and water, and can be easily dried for continuous use. Furthermore, the CA functional coating exhibits good stability in salt solutions and acidic environments, making it an ideal material for addressing oily wastewater challenges.Highlights The coating obtained by electrostatic spraying and CVD was superhydrophobic. The separation flux and separation efficiencies of coatings is 23977.77 L·m−2·h−1 and 99%. Coatings remain stable under polar environment conditions (pH = 2–12 and NaCl = 1–3 mol/L).

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Preparation of self‐healing hydrophobic coating and its anticorrosion property

Cited by 11 publications

References 33 publications

Preparation of polyaniline/cellulose nanofiber composites with enhanced anticorrosion performance for waterborne epoxy resin coatings

Preparation of polyaniline/cellulose nanofiber composites with enhanced anticorrosion performance for waterborne epoxy resin coatings

In Situ Polymerized Self-Healing Microcapsules as Multifunctional Fillers toward Phosphate Ceramic Coatings

Cellulose acetate superhydrophobic coatings for efficient oil–water separation using a combination of electrostatic spraying and chemical vapor deposition

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