Preparation of Hydroxyapatite/Tannic Acid Coating to Enhance the Corrosion Resistance and Cytocompatibility of AZ31 Magnesium Alloys

Zhu, Bowu; Wang, Shimeng; Wang, Lei; Yang, Yang; Liang, Jun; Cao, Baocheng

doi:10.3390/coatings7070105

Cited by 37 publications

(23 citation statements)

References 41 publications

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“…PDA exhibits a “fluffy cushion–” like structure, which is consistent with previous literature . Whereas, PTA indicated by the green arrow shows a “crystal‐” like structure, which is similar to the PTA structure reported by Cao and co‐workers …”

Section: Resultssupporting

confidence: 86%

Ultralight Conductive and Elastic Aerogel for Skeletal Muscle Atrophy Regeneration

Wang

Zhang

et al. 2018

Adv Funct Materials

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Cell-free materials that can transmit both mechanical and electrical stimulations provide a promising strategy for myoinjury repair. Skeletal muscle is sensitive to electrical stimulation (ES), and accordingly, materials are required to transmit the electrical signal while maintaining their elasticity to build the cellular communication network in denervated muscle for retarding muscle atrophy. Here, tannic acid functionalized with methacrylate group (TA-MA), dopamine, and hydrothermal reduction are employed in multistep base reduction to fabricate a polydopamine (PDA)/reduced graphite oxide (rGO) aerogel. This mussel-inspired PDA/rGO aerogel possesses good conductivity, electromechanical stability, and appropriate Young's modulus, which are favorable for the growth and differentiation of C2C12 myoblasts. After the cell-free PDA/rGO aerogel-transplanted denervated muscle is loaded with cyclic ES for 3 weeks, the mean muscle fiber size increases by 90% and the maximum contraction force of denervated muscle elevates by 50%, accompanied with a slight inflammation infiltration in muscle. In conclusion, PDA/rGO aerogel is a safe and effective implant for retarding the disuse muscle atrophy.

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Section: Resultssupporting

confidence: 86%

Ultralight Conductive and Elastic Aerogel for Skeletal Muscle Atrophy Regeneration

Wang

Zhang

et al. 2018

Adv Funct Materials

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“…The similar resistivity of both the material states can be connected with similar corrosion products (amount and character) observed on material surfaces (Figure 6a,b). On the surfaces of both the analyzed samples was observed the presence of a layer of magnesium phosphate (Mg 3 (PO 4 ) 2 ) and hydroxiapatite (Ca 10 (PO 4 ) 6 (OH) 2 ) primarily created on the sample surface and covered by large number of clusters of MgO and Mg(OH) 2 products [45,53]. The assumption that the layer of the magnesium phosphate (Mg 3 (PO 4 ) 2 ) and hydroxiapatite (Ca 10 (PO 4 ) 6 (OH) 2 ) is thicker ( Figure 6) in the case of ground sample correlate with slightly higher values of R p determined for the material state (Table 5).…”

Section: Discussionmentioning

confidence: 99%

Influence of the Composition of the Hank’s Balanced Salt Solution on the Corrosion Behavior of AZ31 and AZ61 Magnesium Alloys

Tkácz

Doležal

Drábiková

et al. 2017

Metals

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Abstract:The electrochemical corrosion characteristics of AZ31 and AZ61 magnesium alloys were analyzed in terms of potentiodynamic tests and electrochemical impedance spectroscopy. The influence of the solution composition and material surface finish was examined also through the analysis of corrosion products created on the samples' surface after electrochemical measurements in terms of scanning electron microscopy using energy-dispersive spectroscopy. Obtained data revealed the differences in the response of the magnesium alloys to enriched Hank's Balanced Salt Solution-HBSS+ (with Mg 2+ and Ca 2+ ions) and Hank's Balanced Salt Solution-HBSS (without Mg 2+ and Ca 2+ ions). Both examined alloys exhibited better corrosion resistance from the thermodynamic and kinetic point of view in the enriched HBSS+. AZ61 magnesium alloy reached higher values of polarization resistance than AZ31 magnesium alloy in both the used corrosion solutions. Phosphate-based corrosion products were characteristic for the AZ31 and AZ61 alloys tested in the HBSS (without Mg 2+ and Ca 2+ ions). The combination of phosphate-based corrosion products and clusters of MgO and Mg(OH) 2 was typical for the surface of samples tested in the enriched HBSS+ (with Mg 2+ and Ca 2+ ions). Pitting corrosion attack was observed only in the case of enriched HBSS+.

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“…Magnesium alloy has been suggested as a revolutionary biodegradable metal for use as an orthopedic material due to its advantageous properties, such as high biodegradability and recoverability, lightweight nature, good mechanical strength, and good resistance against electromagnetic waves. Particularly, the elastic modulus of magnesium is similar to natural bone tissue and can prevent the occurrence of stress-shielding effects to facilitate the healing of bone tissue [5,6]. One of the first clinical applications of pure magnesium implants was in 1906 by Lambotte.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Corrosion Resistance and Cytocompatibility of MgO and ZrO2 Coatings on AZ31 Magnesium Alloy Formed via Plasma Electrolytic Oxidation

Wang

Nai

et al. 2018

Coatings

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In this work, one coating is comprised of ZrO 2 and the other consists of MgO as main phase composition was produced on AZ31 magnesium alloy using one-step plasma electrolytic oxidation (PEO). The purpose of this work was to study the corrosion resistance and cytocompatibility of the above-coated AZ31 magnesium alloys in order to provide a basis for AZ31 Mg alloy's clinical applications of biomedical use. The morphology and phase composition of the coatings were studied using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The corrosion properties were examined using electrochemical testing, hydrogen evolution measurements, and immersion tests in a simulated body fluid (SBF). Compared with bare magnesium and the MgO coating, the ZrO 2 -containing coating exhibited an improved corrosion resistance. Cell proliferation assays and cell morphology observations showed that the ZrO 2 -containing coating was not toxic to the L-929 cells. The ZrO 2 coating was much denser and more homogeneous than the MgO coating, hence the corrosion resistance of the ZrO 2 -coated AZ31 Mg alloy was superior and more stable than the MgO-coated AZ31 Mg alloy, and ZrO 2 /AZ31 did not induce a cytotoxic reaction to L-929 cells and promote cell growth.

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Preparation of Hydroxyapatite/Tannic Acid Coating to Enhance the Corrosion Resistance and Cytocompatibility of AZ31 Magnesium Alloys

Cited by 37 publications

References 41 publications

Ultralight Conductive and Elastic Aerogel for Skeletal Muscle Atrophy Regeneration

Ultralight Conductive and Elastic Aerogel for Skeletal Muscle Atrophy Regeneration

Influence of the Composition of the Hank’s Balanced Salt Solution on the Corrosion Behavior of AZ31 and AZ61 Magnesium Alloys

Comparison of Corrosion Resistance and Cytocompatibility of MgO and ZrO2 Coatings on AZ31 Magnesium Alloy Formed via Plasma Electrolytic Oxidation

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