Sandwiched polydopamine (PDA) layer for titanium dioxide (TiO2) coating on magnesium to enhance corrosion protection

Chen, Yingqi; Zhao, Sheng; Chen, Meiyun; Zhang, Wentai; Mao, Jinlong; Zhao, Yuancong; Maitz, Manfred F.; Huang, Nan; Wan, Guojiang

doi:10.1016/j.corsci.2015.03.020

Cited by 93 publications

(39 citation statements)

References 40 publications

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“…In this study, PDA successfully enhanced the bonding force between the gelatin/rhBMP-2 layer and the surface of the porous 5%β-TCP/ Mg-3%Zn composite. The potential mechanism may involve the formation of a dopamine membrane with strong adhesion on the substrate surface [54][55][56] by self-polymerization under alkaline conditions.…”

Section: Discussionmentioning

confidence: 99%

Enhanced osteoinductivity and corrosion resistance of dopamine/gelatin/rhBMP-2–coated β-TCP/Mg-Zn orthopedic implants: An in vitro and in vivo study

et al. 2020

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Magnesium-based biomaterials are attracting increasingly more attention for orthopedic applications based on their appropriate mechanical properties, biodegradability, and favorable biocompatibility. However, the high corrosion rate of these materials remains to be addressed. In this study, porous β-Ca 3 (PO 4) 2 /Mg-Zn (β-TCP/Mg-Zn) composites were fabricated via a powder metallurgy method. The β-TCP/Mg-Zn composites with 6% porosity exhibited optimal mechanical properties, and thus, they were selected for surface modification. A novel dopamine/gelatin/recombinant human bone morphogenetic protein-2 (rhBMP-2) coating with demonstrated stability was prepared to further improve the corrosion resistance of the composite and enhance early osteoinductivity. The homogeneously coated β-TCP/Mg-Zn composite showed significantly improved corrosion resistance according to electrochemical and immersion tests. In addition, extracts from the dopamine/ gelatin/rhBMP-2-coated β-TCP/Mg-Zn composite not only facilitated cell proliferation but also significantly enhanced the osteogenic differentiation of Sprague-Dawley rat bone marrow-derived mesenchymal stem cells in vitro. Furthermore, in vivo experiments were performed to evaluate the biodegradation, histocompatibility, and osteoinductive potential of the coated composite. No obvious pathological changes in the vital visceral organs were observed after implantation, and radiography and hematoxylin-eosin staining showed strong promotion of new bone formation, matched composite degradation and bone regeneration rates, and complete absorption of the released hydrogen gas. Collectively, these results indicate that the dopamine/gelatin/rhBMP-2-coated β-TCP/Mg-Zn composite offers improved corrosion resistance, favorable biocompatibility, and enhanced osteoinductive potential for use in the fabrication of orthopedic implants.

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Section: Discussionmentioning

confidence: 99%

Enhanced osteoinductivity and corrosion resistance of dopamine/gelatin/rhBMP-2–coated β-TCP/Mg-Zn orthopedic implants: An in vitro and in vivo study

et al. 2020

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“…Therefore, two types of equivalent circuits models (embedded in each Nyquist plot) were applied to decode their components. For Zn and Mg, it is proposed as R s (Q dl (R ct (Q p R p (R L (L)))) [44] and for Fe, it is R s (Q dl (R ct (Q p R p ))): where R s represents the electrolyte resistance; Q dl and R ct relate to the double layer capacitance and resistance associate with interfacial charge transfer reaction respectively; Q p and R p refer to the capacitance and resistance of the surface products layer; and R L and L represent the inductive resistance and inductance due to probably the localized corrosion, respectively. Their fitted results are listed in Table 2.…”

Section: Transient Electrochemical Corrosion Behaviormentioning

confidence: 99%

Comparative corrosion behavior of Zn with Fe and Mg in the course of immersion degradation in phosphate buffered saline

et al. 2016

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“…The presence of water molecules at the coating-substrate interface may trigger electrochemical corrosion of a metal under the coating, leading to a decrease in adhesion strength and coating delamination. The barrier performance and permeability of organic coatings can be improved by the incorporation of inorganic fillers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. For instance, Dhoke and co-workers [1] found that the addition of nano-ZnO on the alkyd-based waterborne coating can enhance the density of the coatings thereby reducing the transport paths for the corrosive electrolyte to pass through the coating system and hence reducing the corrosion process.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of Anticorrosion and Antifriction Properties for High Performance Polyurethane/Graphene Composite Coatings

2018

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Abstract:This work contributes to the development and characterization of the corrosion resistance and antifriction properties of high performance polyurethane (PU)/graphene (Gr) composite coating. In this study, PU composite coatings containing 0, 2, 4 and 8 wt.% of Gr were prepared and evaluated using various corrosion and mechanical tests, namely electrochemical impedance spectroscopy, salt spray tests, cross-cut tape tests and dynamic mechanical analysis. Antifriction properties of the coatings were evaluated using a tribometer with a ball-on-disc mode at room temperature. The corrosion resistance and adhesion property of the PU coatings were found to be enhanced by adding 4 and 8 wt.% of Gr. The coefficient of friction revealed that the antifriction properties of the PU/Gr composite coatings were 61% lower than those of the conventional coating when the Gr content was increased to 8 wt.%.

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Sandwiched polydopamine (PDA) layer for titanium dioxide (TiO2) coating on magnesium to enhance corrosion protection

Cited by 93 publications

References 40 publications

Enhanced osteoinductivity and corrosion resistance of dopamine/gelatin/rhBMP-2–coated β-TCP/Mg-Zn orthopedic implants: An in vitro and in vivo study

Enhanced osteoinductivity and corrosion resistance of dopamine/gelatin/rhBMP-2–coated β-TCP/Mg-Zn orthopedic implants: An in vitro and in vivo study

Comparative corrosion behavior of Zn with Fe and Mg in the course of immersion degradation in phosphate buffered saline

Development and Characterization of Anticorrosion and Antifriction Properties for High Performance Polyurethane/Graphene Composite Coatings

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