One-step electrochemical fabrication of bilayered MgO/polymer coating on magnesium alloy

Liang, Jun; Zhang, Renhui; Peng, Zenghui; Liu, Baixing

doi:10.1007/s11706-014-0250-z

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…Usually, the corrosion resistance of Mg alloys can be improved by means of purifying and alloying, ,− refinement of microstructure by postprocessing , and surface modification, such as phosphate conversion coatings, , microarc oxidation (MAO) coatings, , polymeric coatings, silane-modified coatings, layer-by-layer assembly − and layered double hydrotalcite. , …”

Section: Introductionmentioning

confidence: 99%

“…Usually, the corrosion resistance of Mg alloys can be improved by means of purifying and alloying, 2,11−13 refinement of microstructure by postprocessing 14,15 and surface modification, such as phosphate conversion coatings, 16,17 microarc oxidation (MAO) coatings, 18,19 polymeric coatings, 19 silanemodified coatings, 20 layer-by-layer assembly 21−25 and layered double hydrotalcite. 26,27 Numerous studied have been conducted on biomedical Mg alloys, such as Mg−Al (AZ31), Mg−Zn (Mg−6Zn, Mg−Zn− Nd), Mg−Mn, Mg-RE (WE43), Mg−Ca (Mg−0.8Ca) and Mg−Li (LAE442) alloys.…”

Section: Introductionmentioning

confidence: 99%

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In Vitro Corrosion and Cytocompatibility of a Microarc Oxidation Coating and Poly(l-lactic acid) Composite Coating on Mg–1Li–1Ca Alloy for Orthopedic Implants

Zeng

Cui

Jiang

et al. 2016

ACS Appl. Mater. Interfaces

270

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Manipulating the degradation rate of biomedical magnesium alloys poses a challenge. The characteristics of a microarc oxidation (MAO), prepared in phytic acid, and poly(L-lactic acid) (PLLA) composite coating, fabricated on a novel Mg-1Li-1Ca alloy, were studied through field emission scanning electron microscopy (FE-SEM), electron probe X-ray microanalysis (EPMA), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The corrosion behaviors of the samples were evaluated via hydrogen evolution, potentiodynamic polarization and electrochemical impedance spectroscopy in Hanks' solution. The results indicated that the MAO/PLLA composite coatings significantly enhanced the corrosion resistance of the Mg-1Li-1Ca alloy. MTT and ALP assays using MC3T3 osteoblasts indicated that the MAO/PLLA coatings greatly improved the cytocompatibility, and the morphology of the cells cultured on different samples exhibited good adhesion. Hemolysis tests showed that the composite coatings endowed the Mg-1Li-1Ca alloys with a low hemolysis ratio. The increased solution pH resulting from the corrosion of magnesium could be tailored by the degradation of PLLA. The degradation mechanism of the composite coatings was discussed. The MAO/PLLA composite coating may be appropriate for applications on degradable Mg-based orthopedic implants.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Vitro Corrosion and Cytocompatibility of a Microarc Oxidation Coating and Poly(l-lactic acid) Composite Coating on Mg–1Li–1Ca Alloy for Orthopedic Implants

Zeng

Cui

Jiang

et al. 2016

ACS Appl. Mater. Interfaces

270

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show abstract

“…For example, Feng et al revealed strong antibacterial effects of pure Mg against Staphylococcus aureus [5]. And the relatively high initial degradation rate of Mg and its alloys could be controlled by various surface coating strategies [7][8][9][10][11][12]. Recent clinical studies have revealed the great translational potential of Mg and its alloys as screws for hand-and-wrist fractures [13], or as screws for the fixation of vascularized bone graft in treatment of osteonecrosis of the femoral head [14].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterizations of Metallic Mg Containing PMMA-Based Partially Degradable Composite Bone Cements

Lin

Chan

Tan

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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Inadequate strength at the bone/cement interface is one of the main drawbacks of poly(methylmethacrylate) (PMMA) bone cement in the current orthopedic surgeries. In the present work, a partially degradable PMMA/Mg composite bone cement (PMC) was developed for enhancing the bone/cement interfacial strength, which is proposed to be accomplished by increasing the osteo-conductivity of PMMA and enhancing the mechanical interlocking between bone tissue and the porous PMMA surface formed by the degradation of Mg on the surface of the cement. PMCs were prepared with various concentrations of Mg particles with different sizes and alloy compositions. The effects of Mg particle size, composition and content on the injectability, mechanical and degradation properties, and biocompatibility of PMCs were evaluated. The results show that these parameters affected the properties of the PMCs simultaneously. The good injectability and compressive strengths of PMMA were preserved, while the compatibility to osteoblasts was enhanced when adding Mg particles in a proper manner. The PMCs degraded at the surface with time and formed porous surface structures in the physiological environment, while maintaining the original compressive strengths. This preliminary study shows that the PMC is promising for minimally invasive orthopedic surgery; however, it still requires to be optimized and evaluated in the future.

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“…Therefore, a significant improvement in corrosion resistance is of importance for magnesium alloys to be widely utilized. Surface modification is one of the approaches applied on magnesium alloy to provide a dense barrier for protecting the substrates from corrosion [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of Zn–Al layered double hydroxide/poly(lactic acid) composite coating on magnesium alloy AZ31

Zeng

Liu

et al. 2015

Front. Mater. Sci.

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A Zn-Al layered double hydroxide (ZnAl-LDH) coating consisted of uniform hexagonal nano-plates was firstly synthesized by co-precipitation and hydrothermal treatment on the AZ31 alloy, and then a poly(lactic acid) (PLA) coating was sealed on the top layer of the ZnAl-LDH coating using vacuum freeze-drying. The characteristics of the ZnAl-LDH/PLA composite coatings were investigated by means of XRD, SEM, FTIR and EDS. The corrosion resistance of the coatings was assessed by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed that the ZnAl-LDH coating contained a compact inner layer and a porous outer layer, and the PLA coating with a strong adhesion to the porous outer layer can prolong the service life of the ZnAl-LDH coating. The excellent corrosion resistance of this composite coating can be attributable to its barrier function, ion-exchange and self-healing ability.

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One-step electrochemical fabrication of bilayered MgO/polymer coating on magnesium alloy

Cited by 6 publications

References 26 publications

In Vitro Corrosion and Cytocompatibility of a Microarc Oxidation Coating and Poly(l-lactic acid) Composite Coating on Mg–1Li–1Ca Alloy for Orthopedic Implants

In Vitro Corrosion and Cytocompatibility of a Microarc Oxidation Coating and Poly(l-lactic acid) Composite Coating on Mg–1Li–1Ca Alloy for Orthopedic Implants

Fabrication and Characterizations of Metallic Mg Containing PMMA-Based Partially Degradable Composite Bone Cements

Corrosion resistance of Zn–Al layered double hydroxide/poly(lactic acid) composite coating on magnesium alloy AZ31

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