Direct growth of Mg-Fe-CO3 layered double hydroxide on pure Mg and its corrosion property in conventional simulated body fluid

• Main Authors: Hung-Hsi Ku, 辜泓熙
• Other Authors: 汪俊延
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/xj2m2k

碩士 === 國立中興大學 === 材料科學與工程學系所 === 100 === Mg-Fe-CO3 layer double hydroxide (Mg-Fe-CO3 LDH) has been investigated that is highly biocompatible and is low cytotoxicity. LDH usually be synthesized into powder, and is utilized to be a drug delivery. This work presents a method for directly forming Mg-Fe-CO3 LDH on the pure Mg substrate and the coating of the Mg-Fe-CO3 LDH could increase the ability of corrosion-resistant in C-SBF at 37.5 。C. Moreover, the size of the platelet-like structure of Mg-Fe-CO3 LDH is affected by the pH value of the Fe3+/HCO3-/CO32- at 70 。C. the size of the platelet-like structure of Mg-Fe-CO3 LDH the CO2pH6.0/20h sample is bigger than the CO2pH4.6/20h sample. Repeatedly sliding on the CO2pH4.6/20h sample could be an effective way to change the morphology of the CO2pH4.6/20h sample. From the cross-sectional observation of the CO2pH4.6/20h sample by TEM, Mg-Fe-CO3 LDH (the top layer), the middle layer and inner layer were observed. The thickness of Mg-Fe-CO3 LDH is around 1um, the middle layer is around 2~2.5um and the inner layer is 1~2um. The Mg-Fe-CO3 LDH is composed of Mg, Fe, C and O. Moreover, the middle layer and the inner layer are composed of Mg, C and O.