沉积电压对羟基磷灰石-还原氧化石墨烯-壳聚糖(HA-NrGO-CS)复合涂层的影响研究  

Study on the effect of deposition voltage on HA-NrGO-CS composite coatings

作　　者：张立勋 祝敬佩 王伟[1] 张登基 黄家鑫 陈梓豪 ZHANG Lixun;ZHU Jingpei;WANG Wei;ZHANG Dengji;HUANG Jiaxin;CHEN Zihao(School of Materials Science and Engineering,Shanghai University of Engineering andTechnology,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料科学与工程学院,上海201620

出　　处：《功能材料》2025年第4期4001-4009,4015,共10页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51271111);上海工程技术大学大学生创新资助项目(cx2405007)。

摘　　要：利用电泳沉积和热还原相结合的方法,在ZK60镁合金表面制备不同沉积电压下的HA-NrGO-CS(羟基磷灰石-还原氧化石墨烯-壳聚糖)三元复合涂层,XRD(X射线衍射)结果表明,Mg^(2+)会掺杂到HA(羟基磷灰石)中影响HA(002)晶面的生长,使其沿(300)晶面生长形成片或板状的HA再结晶晶体,Mg^(2+)掺杂从而减小复合涂层的晶粒尺寸形成更加均匀致密的复合涂层。红外和拉曼光谱证实了氮原子的掺杂和GO(氧化石墨烯)的有效还原。电化学结果显示,不同沉积电压下制备的HA-NrGO-CS复合涂层对基体都有一定的保护,140 V条件下制备的复合涂层具有最大的E_(corr)(腐蚀电位):-0.28 V值和最小的I_(corr)(腐蚀电流密度):5.04μA/cm^(2)值,CR(腐蚀率)值:0.11 mm/year表明涂层能有效延缓基体合金的腐蚀速率,此时复合涂层具有最优的耐腐蚀性能。有效地解决了Mg基体作为潜在骨科植入材料在人体内腐蚀速率过快的问题。HA-NrGO-CS ternary composite coatings were prepared on the surface of ZK60 magnesium alloy under different deposition voltages by using a combination of electrophoretic deposition and thermal reduction.XRD results showed that Mg^(2+)would doped into HA to affect the growth of the HA(002)crystalline surface,so that it would grow along the(300)crystalline surface to form flaky or plate-like recrystallization crystals of HA,and the Mg^(2+)doping would thus reduce the grain size of the composite coating to form a more uniform and dense composite coating.IR and Raman spectra confirmed the doping of N atoms and the effective reduction of GO.The electrochemical results showed that the HA-NrGO-CS composite coatings prepared at different deposition voltages protect the substrate to a certain extent,and the composite coatings prepared at 140 V have the largest E_(corr)(-0.28 V)value and the smallest I_(corr)(5.04μA/cm^(2))value.The C R value is 0.11 mm/year,showing that the coating can effectively retard the corrosion rate of the matrix alloy,at which time the composite coating has optimal corrosion resistance.It effectively solved the problem of excessive corrosion rate of Mg matrix as a potential orthopedic implant material in human body.

关 键 词：生物可降解合金 复合涂层 羟基磷灰石 壳聚糖 N掺杂还原氧化石墨烯 电化学分析 耐腐蚀性能 

分 类 号：TG178[金属学及工艺—金属表面处理]