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Biodegradation behavior of polymethyl methacrylate−bioactive glass 45S5 composite coated magnesium in simulated body fluid

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Transactions of Nonferrous Metals Society of China 2022年第7期32卷 2216-2228页

作者： zanko rouein Hassan JAFARI Fatemehsadat PISHBIN Rahim MOHAMMADI Abdolreza SIMCHI Department of Materials Engineering Faculty of Materials Engineering and Interdisciplinary SciencesShahid Rajaee Teacher Training University16785-136TehranIran School of Metallurgy and Materials Engineering College of EngineeringUniversity of Tehran11155-4563TehranIran Department of Materials Science and Engineering Sharif University of Technology11365-11155TehranIran Institute for Nanoscience and Nanotechnology Sharif University of TechnologyAzadi Avenue11365-8639TehranIran

The biodegradation behavior of Mg,coated by polymethyl methacrylate as well as polymethyl methacrylate(PMMA)−bioactive glass(BG)composite was *** deposition and dip coating techniques were adopted to prepare composite coating using a suspension of different percentages of the above two chemical *** deposited coatings were characterized using SEM,EDS,FTIR,and water contact angle *** behavior study of the coated Mg was performed using linear polarization,impedance spectroscopy,and immersion tests in simulated body *** compact and homogeneous composite coating was developed as evidenced by electron microscopy *** water contact angle measurement showed a 44°increase in the contact angle of the composite coated Mg compared to the uncoated *** composite coating was covered by a bone-like hydroxyapatite layer after 336 h,indicating that the coating has an excellent in vitro *** electrochemical testing results confirmed a significant reduction,96.9%,in the biodegradation rate of Mg coated with the composite prepared from 45 g/L PMMA+3.5 g/L 45S5 GB suspension compared to that of the uncoated ***,the composite coated Mg can be proposed as a promising material for biodegradable implant application.

关键词： magnesium alloy polymethyl methacrylate bioactive glass composite coating electrophoretic deposition biodegradation

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