Design and fabrication of nano textured superhydrophobic and anti-corrosive silane-grafted ZnO/bio-based polyurethane bilayer coating

John, Ben; Rajimol, P.R.; Rajan, T.P.D.; Sahoo, Sushanta K.

doi:10.1016/j.surfcoat.2022.129036

Cited by 18 publications

(12 citation statements)

References 38 publications

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“…38,69 Furthermore, the Warburg constant fitted the Nyquist plot in the double-channel circuit, where we can observe higher silane strength under the organic layer. 69 The chi-square (X 2 ) values were on the order of 10 −3 , indicating good fitting quality. The Nyquist plot describes the evolution of the resulting impedance as a function of the Z real and Z imag components.…”

Section: Silanization With Aptes Increases the Corrosion Resistance O...mentioning

confidence: 67%

“…Due to the presence of two electrochemical interfaces, two pairs of elements were used, namely, Q out and R pout for the outer layer and R pin and Q in in series with W diff (Figure b‴). The time constant of Warburg’s diffusion parameter (WT) was used to represent the passage of ionic species in the electrolyte through the treatment, where it describes the diffusional behavior in response to a potential applied under electrochemical stimuli at low frequencies. , Furthermore, the Warburg constant fitted the Nyquist plot in the double-channel circuit, where we can observe higher silane strength under the organic layer . The chi-square ( X 2 ) values were on the order of 10 –3 , indicating good fitting quality.…”

Section: Resultsmentioning

confidence: 99%

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Boosting Titanium Surfaces with Positive Charges: Newly Developed Cationic Coating Combines Anticorrosive and Bactericidal Properties for Implant Application

Silva

Costa

Nagay

et al. 2023

ACS Biomater. Sci. Eng.

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Along with poor implant−bone integration, peri-implant diseases are the major causes of implant failure. Although such diseases are primarily triggered by biofilm accumulation, a complex inflammatory process in response to corrosive-related metallic ions/debris has also been recognized as a risk factor. In this regard, by boosting the titanium (Ti) surface with silane-based positive charges, cationic coatings have gained increasing attention due to their ability to kill pathogens and may be favorable for corrosion resistance. Nevertheless, the development of a cationic coating that combines such properties in addition to having a favorable topography for implant osseointegration is lacking. Because introducing hydroxyl (−OH) groups to Ti is essential to increase chemical bonds with silane, Ti pretreatment is of utmost importance to achieve such polarization. In this study, plasma electrolytic oxidation (PEO) was investigated as a new route to pretreat Ti with OH groups while providing favorable properties for implant application compared with traditional hydrothermal treatment (HT). To produce bactericidal and corrosion-resistant cationic coatings, after pretreatment with PEO or HT (Step 1), surface silanization was subsequently performed via immersion-based functionalization with 3-aminopropyltriethoxysilane (APTES) (Step 2). In the end, five groups were assessed: untreated Ti (Ti), HT, PEO, HT+APTES, and PEO+APTES. PEO created a porous surface with increased roughness and better mechanical and tribological properties compared with HT and Ti. The introduction of −OH groups by HT and PEO was confirmed by Fourier transform infrared spectroscopy and the increase in wettability producing superhydrophilic surfaces. After silanization, the surfaces were polarized to hydrophobic ones, and an increase in the amine functional group was observed by X-ray photoelectron spectroscopy, demonstrating a considerable amount of positive ions. Such protonation may explain the enhanced corrosion resistance and dead bacteria (Streptococcus aureus and Escherichia coli) found for PEO+APTES. All groups presented noncytotoxic properties with similar blood plasma protein adsorption capacity vs the Ti control. Our findings provide new insights into developing next-generation cationic coatings by suggesting that a tailorable porous and oxide coating produced by PEO has promise in designing enhanced cationic surfaces targeting biomedical and dental implant applications.

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Section: Silanization With Aptes Increases the Corrosion Resistance O...mentioning

confidence: 67%

Section: Resultsmentioning

confidence: 99%

Boosting Titanium Surfaces with Positive Charges: Newly Developed Cationic Coating Combines Anticorrosive and Bactericidal Properties for Implant Application

Silva

Costa

Nagay

et al. 2023

ACS Biomater. Sci. Eng.

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show abstract

Section: Resultsmentioning

confidence: 99%

“…The loosely bound pi electrons flow to the metal d-orbitals. 64 Both these actions prevent the oxidation of the metal and prevent the formation of corrosion products. Retro donation from the metal atoms to the vacant molecular orbitals of the inhibitor makes the adhesion to the surface stronger.…”

Section: Resultsmentioning

confidence: 99%

“…The Nyquist plot can be divided into two parts, the capacitive arc at the higher frequency represents the polymer part, and the second part from the end of the arc, a straight line at a lower frequency, representing stable corrosion products in small amounts. 64 The possibility of self-healing potential is more evident in the polarisation studies than in the EIS analysis. Even though the E corr changes, the i corr values remain almost constant.…”

Section: Structural Determination Of Epoxidized Oil and Isolated Oxyr...mentioning

confidence: 99%

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Development of an oxyresveratrol incorporated bio-based smart nanocomposite coating with anti-corrosive, self-healing, and anti-microbial properties

P. R.,

Ulaeto,

Raj V

et al. 2023

Green Chem.

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Plasma electrolytic oxidation based superhydrophobic coatings: fabrication, rudiments, and constraints

Adeleke,

Caldona

2024

J Coat Technol Res

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Plasma electrolytic oxidation (PEO) has evolved as a versatile technique for depositing low surface energy organic-based materials useful in fabricating superhydrophobic (SHP) coating materials. The application of silane-based polymeric organic materials atop PEO coating is the most common method to prepare coating materials for wetting and corrosion protection. Herein, the latest developments in PEO-based coatings employing polymeric/silane-based organic materials with the inclusion of ceramic oxides are reviewed, with emphasis on the structure, wettability, and corrosion resistance. The relevant and existing fundamental design theories and strategies for fabricating highly efficient SHP PEO coatings are also outlined and discussed. The systemic design of SHP coatings by deposition from organic particle dispersion and their inclusion into PEO-micropore layers, as well as the most important parameters affecting the properties of PEO-assisted SHP-based coatings, are highlighted. Furthermore, the merits and challenges of the PEO-assisted SHP-based coating fabrication are critically evaluated to identify remaining challenges and future research directions.

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Design and fabrication of nano textured superhydrophobic and anti-corrosive silane-grafted ZnO/bio-based polyurethane bilayer coating

Cited by 18 publications

References 38 publications

Boosting Titanium Surfaces with Positive Charges: Newly Developed Cationic Coating Combines Anticorrosive and Bactericidal Properties for Implant Application

Boosting Titanium Surfaces with Positive Charges: Newly Developed Cationic Coating Combines Anticorrosive and Bactericidal Properties for Implant Application

Development of an oxyresveratrol incorporated bio-based smart nanocomposite coating with anti-corrosive, self-healing, and anti-microbial properties

Plasma electrolytic oxidation based superhydrophobic coatings: fabrication, rudiments, and constraints

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