Preparation and performance of a composite epoxy coating based on modified hydroxyapatite

Guo, Yuchi; Yu, Zongxue; Chen, Legang; Liao, Kexi; Chen, Haidong; Pang, Yutao; Peng, Bokai; Zhu, Lijuan

doi:10.1016/j.surfcoat.2022.128614

Cited by 15 publications

(7 citation statements)

References 47 publications

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“…It is well known that the break point frequency (f b ) that is the frequency value corresponding to −45°in phase angle curves, can be used to evaluate the degree of separation between coatings and substrates. 43 The smaller the value of f b , the lower the degree of separation. 44 The f b values of WEP, NDs/WEP, and m-NDs/WEP for different immersion times are shown in Figure S10.…”

Section: Corrosion Protection Performance Of Coatingsmentioning

confidence: 99%

Monodispersed Nanodiamonds for Enhanced Anticorrosion of Waterborne Epoxy Coatings

Pan,

Zhang,

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Nanodiamonds (NDs) prepared by the explosion method possess very large surface energies, resulting in serious agglomerates, limiting their further application. Herein, we employed the strong shearing action of hydroxyl ion (OH − ) to induce the hydrolysis of esters between the ND primary particles, generating the carboxyl and hydroxyl groups, breaking hard agglomeration of NDs, and successfully constructed electrical double layers on the surface of NDs via deprotonation of surface oxygen-containing groups induced by the strong shearing action of hydroxyl ion (OH − ), leading to a significant increase of zeta potential absolute value (−54.2 mV), achieving the long-term stable (200 days) monodispersion of NDs (m-NDs). The asobtained m-NDs, as efficient nanofillers, were added into the waterborne epoxy (WEP) to produce a composite coating of m-NDs/WEP, displaying a considerable improvement in anticorrosion performance. The results of electrochemical impedance spectroscopy show that the |Z| f = 0.01 Hz of m-NDs/WEP is nearly 3 orders of magnitude higher than that of pure WEP after 168 h of immersion. The excellent anticorrosion performance of m-NDs/WEP can be ascribed to the excellent compatibility, electrical insulation property, and physical barrier behavior of m-NDs, inhibiting the infiltration of corrosive medium. The molecular dynamics simulation reveals that m-NDs have good barrier properties against a corrosive medium.

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Section: Corrosion Protection Performance Of Coatingsmentioning

confidence: 99%

Monodispersed Nanodiamonds for Enhanced Anticorrosion of Waterborne Epoxy Coatings

Pan,

Zhang,

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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“…PDA-HAp also serves as a matrix for carrying other anti-corrosive substances. Guo et al [127] developed anti-corrosive agents using PDA-HAp loaded with silane/alumina (KH550/Al 2 O 3 ) nanoparticles, which displayed both aforementioned corrosion protection mechanisms. KH550/Al 2 O 3 nanoparticles are also anti-corrosive agents.…”

Section: Anti-corrosive Agentsmentioning

confidence: 99%

An Insight to the Various Applications of Hydroxyapatite

Ray Tjieh Lim,

Yi Cheng,

Yi Wee

2023

Advanced Materials Science and Technology

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Hydroxyapatite is a naturally occurring calcium phosphate widely used in biomedical applications because of its osteoconductivity, biocompatibility and it possesses the closest chemical similarity to natural bone. Hydroxyapatite is also a versatile material and can be used in a plethora of ways beyond biomedical applications. This review summarises the applications of hydroxyapatite in biomedical, bioimaging, separation, purification, catalysis, surface treatment and energy storage applications. Finally, this review aims to shed light on its potential for new applications of hydroxyapatite in the future.

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“…In recent years, the excellent physical blocking performance of 2D layered materials in anticorrosive coatings has been widely used in epoxy resin coatings, such as graphene [1,2], oxide graphene [3,4], hydroxyapatite [5,6], boron nitride [7] and MXenes [8]. However, two-dimensional materials such as graphene and MXenes have difficulty in preparation and high costs, making them unsuitable for large-scale industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Performance Research of Natural Mica Modified with Zirconium-Based Metal–Organic Frameworks for an Epoxy Resin Anti-Corrosion Coating

Zhu,

Feng,

Peng

et al. 2023

Molecules

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A new composite material made from mica and a metal–organic framework (MOF) has been developed to improve the anticorrosive capabilities of epoxy resin coatings. The layered mica was loaded with denser and more uniform UIO-66 nanoparticles after modifying the composite with polyethyleneimine (PEI). The composites were used as fillers to prepare epoxy coatings that exhibited long-lasting active (labyrinth effect produced by mica) and passive (pH-sensitive release of corrosion inhibitors) corrosion protection. Settling experiments showed that polyethyleneimine improved the composites’ compatibility in epoxy resin. After being immersed in a 3.5 wt.% NaCl solution for 60 days, the adhesion of PMC–UIO@MBT/EP increases to 9.01 MPa, while the water absorption rate only reaches 2.57%. It indicates that the coating has good barrier properties and stability. After being soaked in a 3.5 wt.% NaCl solution for 60 days at pH = 7, PMC–UIO@MBT/EP exhibits high low-frequency impedance (8.30 × 108 Ω), as demonstrated by the electronic impedance spectrum (EIS). In addition, the coating also exhibited the highest low-frequency impedance after 30 days in 3.5 wt.% NaCl solution at pH = 11.

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Preparation and performance of a composite epoxy coating based on modified hydroxyapatite

Cited by 15 publications

References 47 publications

Monodispersed Nanodiamonds for Enhanced Anticorrosion of Waterborne Epoxy Coatings

Monodispersed Nanodiamonds for Enhanced Anticorrosion of Waterborne Epoxy Coatings

An Insight to the Various Applications of Hydroxyapatite

Performance Research of Natural Mica Modified with Zirconium-Based Metal–Organic Frameworks for an Epoxy Resin Anti-Corrosion Coating

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