Abdel-Hamid Z, Rashad M M, Mahmoud Salwa M, Kandil A T
Central Metallurgical Research and Development Institute, P.O. Box 87, Helwan, Cairo, Egypt.
Central Metallurgical Research and Development Institute, P.O. Box 87, Helwan, Cairo, Egypt.
Mater Sci Eng C Mater Biol Appl. 2017 Jul 1;76:827-838. doi: 10.1016/j.msec.2017.03.126. Epub 2017 Mar 18.
The fabrication of hydroxyapatite-Co-ferrite nanocomposite coatings was performed on stainless steel by chronoamperometry technique. HA-CoFeO nanocomposite films were characterized using X-ray diffraction, scanning electron microscopy, and vibrating sample magnetometer (VSM). The results reveal that CoFeO nanoparticles dispersed within the HA matrix have flake and strip shapes. The magnetic property of the nanocomposite was increased by increasing the concentration of CoFeO and a good saturation magnetization value was found to be 20.6emu/g with 50% CoFeO. By comparing with pure CoFeO, the composite still retain moderate magnetization as well as its biocompatible characters. The specific absorption rate (SAR) values were altered according to the change in CoFeO concentration and the maximum SAR value was 125W/g. The incorporation of CoFeO nanoparticles with HA coating was increased the corrosion resistance of HA in simulated body fluid (SBF). The results indicated that HA-CoFeO nanocomposite coating could be a promising surface treatment technique for stainless steel medical implants as well hyperthermia treatment of cancer.
采用计时电流法在不锈钢表面制备了羟基磷灰石-钴铁氧体纳米复合涂层。利用X射线衍射、扫描电子显微镜和振动样品磁强计（VSM）对HA-CoFeO纳米复合薄膜进行了表征。结果表明，分散在HA基体中的CoFeO纳米颗粒具有片状和条状形状。通过增加CoFeO的浓度提高了纳米复合材料的磁性，在CoFeO含量为50%时，饱和磁化强度值达到20.6emu/g。与纯CoFeO相比，该复合材料仍保留适度的磁化强度及其生物相容性。比吸收率（SAR）值随CoFeO浓度的变化而改变，最大SAR值为125W/g。CoFeO纳米颗粒与HA涂层的结合提高了HA在模拟体液（SBF）中的耐腐蚀性。结果表明，HA-CoFeO纳米复合涂层对于不锈钢医用植入物以及癌症热疗可能是一种有前景的表面处理技术。
