Aloe polysaccharide/microarc oxidation composite coating on AZ31 magnesium alloy: Synergistic enhancement of corrosion resistance and cytocompatibility for biomedical applications
Source abstract
Abstract
A aloe polysaccharide/microarc oxidation composite coating (AP/MAO) was fabricated on AZ31 magnesium alloy via microarc oxidation and dip coating to enhance corrosion resistance and cytocompatibility. SEM, EDS, XRD, and FT-IR showed that the porous MAO layer with micropores and microcracks was effectively sealed by aloe polysaccharides, forming a 14.38 μm thick double-layer coating. Scratch tests indicated strong adhesion (critical load Lc3 = 33.14 N). Water contact angle measurements demonstrated significantly improved hydrophilicity. Electrochemical tests revealed that the AP/MAO coating shifted the corrosion potential positively by 220 mV (from −1.698 V to −1.478 V) and reduced the corrosion current density by nearly three orders of magnitude (from 2.67 × 10 -5 to 3.25 × 10 -8 A·cm -2 ). Hydrogen evolution and immersion experiments further confirmed the enhanced corrosion resistance. Cytocompatibility evaluation showed that MC3T3-E1 cell proliferation on the AP/MAO coating exceeded 85%, significantly higher than on untreated AZ31, with well-preserved cell morphology. Overall, the AP/MAO composite coating synergistically improves corrosion resistance and cytocompatibility, offering a new surface modification strategy for medical magnesium alloy implants.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Magnesium Oxide Properties and Applications · Corrosion Behavior and Inhibition
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
Show source-provided references
1. Factors influencing road traffic accidents causing maxillofacial injuries in Nalgonda District: prospective survey of 366 cases
2. Epidemiology of maxillofacial fractures in northwest China: an 11-year retrospective study of 2240 patients10.1186/s12903-023-03006-x ↗
3. A review of non-biodegradable alloys implantation induced inflammatory and immune cell responses10.1016/j.jallcom.2023.173086 ↗
4. Reconstruction of maxillofacial bone defects using patient-specific long-lasting titanium implants10.1038/s41598-022-11200-0 ↗
5. The development of magnesium-based biomaterials in bone tissue engineering: a review10.1002/jbm.b.35326 ↗
6. Recent progress in surface modification of metals coated by plasma electrolytic oxidation: principle, structure, and performance10.1016/j.pmatsci.2020.100735 ↗
7. Corrosion resistance and biodegradability of micro-arc oxidation coatings with the variable sodium fluoride concentration on ZM21 magnesium alloys10.1016/j.jallcom.2023.171172 ↗
8. In vivo degradation behavior of magnesium alloy for bone implants with improving biological activity, mechanical properties, and corrosion resistance10.3390/ijms24021602 ↗
9. Tribological properties of MAO ceramic coatings with annulus array texture on disposable surgical gloves
10. Functionalizing diatomite-based micro-arc coatings for orthopedic implants: influence of TiO2 addition10.3390/biomimetics8030280 ↗
11. The impact of pre- and post-treatment processes on corrosion resistance of micro-arc oxidation coatings on Mg alloys: a systematic review10.3390/ma18030723 ↗
12. In vivo degradation performance of microarc-oxidized magnesium implants: a micro-CT study in rats10.1016/j.actbio.2012.09.017 ↗
13. Corrosion resistance of a self-healing micro-arc oxidation/polymethyltrimethoxysilane composite coating on magnesium alloy AZ3110.1016/j.corsci.2017.01.025 ↗
14. Advances in anti-corrosion coatings on magnesium alloys and their preparation methods
15. Anthraquinones and Aloe vera extracts as potential modulators of inflammaging mechanisms: a translational approach from autoimmune to onco-hematological diseases10.3390/molecules30061251 ↗
16. Acemannan increased bone surface, bone volume, and bone density in a calvarial defect model in skeletally-mature rats10.1016/j.jds.2018.06.004 ↗
17. Extraction, purification, structural characteristics, biological activities and pharmacological applications of acemannan, a polysaccharide from Aloe vera: a review10.3390/molecules24081554 ↗
18. Compositional and structural features of the main bioactive polysaccharides present in the Aloe vera plant10.5740/jaoacint.18-0119 ↗
19. Pectins from Aloe Vera: extraction and production of gels for regenerative medicine10.1002/app.39760 ↗
20. Evaluation of hydrophilic gel made from Acemannan and Moringa oleifera in enhancing osseointegration of dental implants: a preliminary study in rabbits10.1016/j.jobcr.2020.01.005 ↗
21. How useful is SBF in predicting in vivo bone bioactivity?10.1016/j.biomaterials.2006.01.017 ↗
22. Bi-layer nano-TiO2/FHA composite coatings on mg-zn-ce alloy prepared by combined physical vapour deposition and electrochemical deposition methods10.1016/j.vacuum.2014.08.013 ↗
23. In vitro degradation and antibacterial property of a copper-containing micro-arc oxidation coating on Mg-2Zn-1Gd-0.5Zr alloy10.1016/j.colsurfb.2019.03.023 ↗
24. 2007
25. Forming characteristics and mechanisms of micro-arc oxidation coatings on magnesium alloys based on different types of single electrolyte solutions10.1016/j.ceramint.2023.07.202 ↗
26. Assessment of duplex coating combining plasma electrolytic oxidation and polymer layer on AZ31 magnesium alloy10.1016/j.surfcoat.2012.05.091 ↗
27. FT-IR study of the polysaccharides isolated from the skin juice, gel juice, and flower of Aloe vera tissues affected by fertilizer treatment10.1186/2191-2858-2-33 ↗
28. Rheological and structural characterization of prepared aqueous Aloe vera dispersions10.1016/j.foodres.2014.05.033 ↗
29. Comparison of cold-sprayed coatings of copper-based composite deposited on AZ31B magnesium alloy and 6061 T6 aluminum alloy substrates10.3390/ma16145120 ↗
30. Wettability, corrosion resistance, and osteoblast response to reduced graphene oxide on CoCr functionalized with hyaluronic acid10.3390/ma15072693 ↗
31. Enhanced long-term corrosion resistance of Mg alloys by superhydrophobic and self-healing composite coating10.1016/j.cej.2022.137778 ↗
32. In vivo study of microarc oxidation coated Mg alloy as a substitute for bone defect repairing: degradation behavior, mechanical properties, and bone response10.1016/j.colsurfb.2019.05.052 ↗
33. Bioactive MAO/CS composite coatings on mg-zn-ca alloy for orthopedic applications
34. Preparation and characterization of micro-arc oxidation biological coatings on magnesium alloys containing graphene oxide10.1016/j.cej.2024.149064 ↗
35. Effect of potassium fluotitanate concentration on the corrosion resistance and degradation property of micro-arc oxidized ZM21 magnesium alloys10.1016/j.jmrt.2023.05.284 ↗
36. Corrosion and biocompatibility behaviours of microarc oxidation/phytic acid coated magnesium alloy clips for use in cholecystectomy in a rabbit model10.1039/D0RA09275D ↗
37. ISO 10993: biological evaluation of medical devices