ZnTi层状双氢氧化物的制备及其缓蚀和抑菌性能研究  

Synthesis of ZnTi-layered Double Hydroxide and Its Corrosion Inhibition Property and Antimicrobial Activities

作　　者：鞠晓丹 田惠文[1] 刘昂 李伟华[1] JU Xiao-dan;TIAN Hui-wen;LIU Ang;LI Wei-hua(Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院海洋研究所,青岛266071 [2]中国科学院大学,北京100049

出　　处：《表面技术》2020年第11期245-251,共7页Surface Technology

基　　金：国家杰出青年科学基金(51525903);青岛海洋科学与技术国家实验室“鳌山人才”卓越科学家计划项目(2017ASTCP-OS09);国家自然科学面上项目(No.51679227)。

摘　　要：目的制备具有缓蚀和抑菌双重作用的ZnTi层状双氢氧化物(LDHs)。方法通过反相微乳法,一步合成插层缓蚀剂维生素C(Vitamin C,Vc)和香草醛(Vanillin,Van)的ZnTi-LDHs。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)和傅里叶红外变换光谱仪(FTIR)对制备的LDHs进行形貌、结构和成分表征;通过电化学阻抗谱(EIS)研究其缓蚀性能;通过紫外分光光度计(UV-vis,UV5200)测定细菌悬浮液在600 nm处的吸光值,绘制细菌生长曲线,研究其抑菌效果。结果制备的LDHs为典型的二维片层状结构,合成插层缓蚀剂后,XRD图谱中(003)和(006)特征峰明显向高度数偏移,FTIR具有明显的Vc和Van的特征吸收峰,表明缓蚀剂成功负载到LDHs层间。电化学阻抗谱测试结果表明,所制备的LDHs对碳钢具有较好的缓蚀效果,24 h后,ZnTi/Vc-LDHs与ZnTi/Van-LDHs的缓蚀效率分别达到90.47%和91.97%。细菌生长曲线测试结果表明,制备的ZnTi-LDHs可以无选择性地抑制金黄色葡萄球菌(S.aureus)和大肠杆菌(E.coli)的生长,ZnTi/Vc-LDHs最高可抑制97.22%的金黄色葡萄球菌生长,ZnTi/Van-LDHs最高可抑制98.30%的大肠杆菌生长。结论ZnTi/Vc-LDHs与ZnTi/Van-LDHs不仅具有较好的缓蚀效果,而且能够有效地抑制细菌生长。The work aims to synthesize the ZnTi-layered double hydroxide(LDHs)with dual functions of corrosion inhibition and antimicrobial activities.The ZnTi-LDHs intercalated with ascorbic acid(Vc)and vanillin(Van)were synthesized in one step by the reverse microemulsion method.The surface morphology,structure and composition of LDHs were characterized by scanning electron microscope(SEM),X-ray diffractometer(XRD),and Fourier transform infrared spectrometer(FTIR).The corrosion inhibition property was investigated by electrochemical impedance spectroscopy(EIS).The absorption value of bacterial suspension at 600 nm was determined by ultraviolet spectrophotometer(UV-vis,UV5200)to plot the bacteria growth curve and study the antimicrobial activities.The prepared LDHs had typical two dimensional layered structures.The XRD characteristic peaks((003)and(006))of LDHs after intercalated with inhibitors were obviously shifted to the high degree.The FTIR results exhibited the main characteristic peaks of Vc and Van,indicating that corrosion inhibitors were intercalated into ZnTi-LDHs successfully.The EIS results showed that the prepared LDHs exhibited excellent corrosion inhibition property for mild steel.The corrosion inhibition efficiency of ZnTi/Vc-LDHs and ZnTi/Van-LDHs reached 90.47%and 91.97%respectively after 24 hours.The bacterial growth curves showed that the prepared LDHs could inhibit the growth of staphylococcus aureus(S.aureus)and escherichia coli(E.coli)non-selectively.ZnTi/Vc-LDHs could inhibit up to 97.22%of the growth of staphylococcus aureus(S.aureus),and ZnTi/Van-LDHs could inhibit up to 98.30%of the growth of escherichia coli(E.coli)The prepared ZnTi/Vc-LDHs and ZnTi/Van-LDHs not only have good corrosion inhibition effect,but also can effectively inhibit the growth of bacteria.

关 键 词：ZnTi-LDHs 反相微乳法 缓蚀 抑菌 

分 类 号：TG174.4[金属学及工艺—金属表面处理]