摘要
目前,有关氧化石墨烯(GO)、十八烷基胺(ODA)和纳米SiO_(2)复合后对材料防腐蚀、抑菌性能的影响研究较少。先后采用十八烷基胺(ODA)及硅烷偶联剂(KH550)改性后的纳米TiO_(2)分别对氧化石墨烯(GO)进行共价改性得到KH550-TiO_(2)@ODA-GO,通过XRD、FTIR、FE-SEM等表征方法研究了该复合材料的物理性能;并将其应用于有机硅-环氧树脂(SMER),利用扫描开尔文探针(SKP)、电化学阻抗谱(EIS)、盐雾试验及抑菌性能测试等方法评价了该复合涂层的防腐蚀及抑菌性能。结果表明:KH550-TiO_(2)@ODA-GO/SMER涂层在3.5%(质量分数)NaCl溶液中浸泡28 d后,低频端阻抗值(|Z|0.01 Hz)仍高达2.78×10^(9)Ω·cm^(2);且其对大肠杆菌的杀灭率达到了95%。KH550-TiO_(2)@ODA-GO与SMER涂层的高相容性提高了涂层的界面结合力、延长了腐蚀介质的扩散路径并增强了涂层的抗剥离性能,从而显著改善了SMER涂层的防腐蚀性能。此外,纳米TiO_(2)在改性及负载到GO片层表面后,在SMER涂层中仍发挥出了良好的抑菌效果。
At present,the reports about the influences of graphene oxide(GO),octadecylamine(ODA)and nano-TiO_(2)composite on the corrosion resistance and antimicrobial activity of materials have less been studied.In this work,GO was first modified covalently by ODA and then by nano-TiO_(2)coupling agent KH550 treatment to prepare KH550-TiO_(2)@ODA-GO composite materials.Additionally,XRD,FTIR,FE-SEM methods were used to study the physical property of KH550-TiO_(2)@ODA-GO composites,and the composites were added into silicone modified epoxy resin(SMER)to prepare KH550-TiO_(2)@ODA-GO/SMER composite coating.The anti-corrosion and antibacterial property of the composite coating was studied by scanning Kelvin probe(SKP),electrochemical impedance spectroscopy(EIS),salt spray and antibacterial test.Results showed that the low-frequency resistance value(|Z|0.01 Hz)of KH550-TiO_(2)@ODA-GO/SMER coating immersed in 3.5%(mass fraction)NaCl solution for 28 d was still as high as 2.78×10^(9)Ω·cm^(2).Besides,the killing rate of KH550-TiO_(2)@ODA-GO/SMER coating to E.coli reached 95%.The high compatibility of KH550-TiO_(2)@ODA-GO with SMER coating not only improved the interfacial bonding force of the coating,but also effectively extended the penetration path of the corrosive medium inside the coating,resulting in the improvement of the anti-peeling performance and thus significantly improving the corrosion resistance of SMER coating.In addition,nano-TiO_(2)still showed good antibacterial effect in SMER coating after modification and loading on GO surface.
作者
张姣
黄峰
刘静
陈雨珊
岳超雄
ZHANG Jiao;HUANG Feng;LIU Jing;CHEN Yu-shan;YUE Chao-xiong(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Engineering Technology Research Center of Marine Materials and Service Safety,Wuhan 430081,China;Brian Science and Advanced and Technology Institute,Medical College,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《材料保护》
CAS
CSCD
2021年第7期21-29,共9页
Materials Protection
基金
国家自然科学基金资助(51871172)资助。
