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Anticorrosive and antibacterial smart integrated strategy for biomedical magnesium

Journal of Magnesium and Alloys 2023年第8期11卷 2789-2800页

作者： JianLiang Zhao HanRui Cui ZeYu Gao YanZe Bi ZhenZhen Dong Yan Li CaiQi Wang School of ChemicalScience University of Chinese Academy of SciencesBeijing100049China School of Materials Science and Engineering Beihang UniversityBeijing 100083China Beijing Advanced Innovation Centre for Biomedical Engineering Beihang UniversityBeijing 100191China

Biomedical magnesium is an ideal material for hard tissue repair and ***,its rapid degradation and infection after implantation significantly hindersclinical *** overcome these two critical drawbacks,we describe an integrated strategybased on the changes in pH and Mg^(2+)triggered by *** system can simultaneously offer anticorrosion and antibacterial ***,nanoengineered peptide-grafted hyperbranched polymers(NPGHPs)with excellent antibacterial activity were introduced to sodium alginate(SA)to construct a sensitive NPGHPs/SA *** swelling degree,responsiveness,and antibacterial activity were then investigated,indicating that the system can perform dual stimulation of pH and Mg^(2+)with controllable antimicrobial ***,an intelligent platform was constructed by coating hydrogels on magnesium with polydopamine as the transition *** alkaline environment generated by the corrosion of magnesium reduces the swelling degree of the coatingso that the liquid is unfavorable for contacting the substrate,thus exhibiting superior corrosion *** testing shows that the material can effectively fight against bacteria,while hemolytic and cytotoxicity testing suggest that it is highly ***,this work realizes the smart integration of anticorrosion and antibacterial properties of biomedical magnesium,thereby providing broader prospects for the use of magnesium.

关键词： Biomedical magnesium Anticorrosion Antibacterial Intelligent Nanoengineered peptide-grafted hyperbranched polymers

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