摘要
为了有效解决生物医用钛合金长期植入人体后,易发生细菌感染和面临有害金属离子释放的问题,采用水热反应和涂覆方法,分别在聚多巴胺(PDA)预处理的Ti6Al4V合金表面制备了氧化石墨烯涂层(GP/T)和氧化石墨烯/纳米氧化锌复合涂层(GZP/T)。系统分析了2种涂层的物相结构、微观形貌及其在林格氏液中的耐腐蚀性能和在大肠杆菌环境中的抗菌性能。结果表明:聚多巴胺发挥“双面胶”桥接作用,有效增强了涂层与基底间的化学键合;GP/T涂层抗菌率随着GO浓度增大而增大;GZP/T纳米复合涂层相较Ti6Al4V基材具有优异的耐蚀性,该复合涂层中ZnO起主要抗菌作用。
In order to effectively solve the problem of bacterial infection and the release of harmful metal ions after long-term implantation of biomedical titanium alloys in the human body, graphene oxide coating(GP/T) and graphene oxide/nano-zinc oxide composite coating(GZP/T) were prepared on the surface of Ti6Al4V alloy pretreated by polydopamine(PDA) with hydrothermal reaction and coating methods. The phase structure, microstructure, corrosion properties in Ringer’s solution and antibacterial properties in Escherichia coli environment of the two coatings were analyzed. The results show that polydopamine plays the role of “double-sided tape” bridging and effectively enhances the chemical bond between the coating and the substrate. The antibacterial rate of GP/T coating increases with GO concentration increasing. The GZP/T nanocomposite coating has superior corrosion resistance compared with Ti6Al4V substrates, and the ZnO in the composite coating plays a major antibacterial effect.
作者
胡勇
胡永淇
李申申
张会莹
褚成
王力华
Hu Yong;Hu Yongqi;Li Shenshen;Zhang Huiying;Chu Cheng;Wang Lihua(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第8期2915-2922,共8页
Rare Metal Materials and Engineering
基金
甘肃省科技计划(17ZD2GC011)
兰州理工大学红柳一流学科建设基金(CGZH001)。
