氟化氢氧磷灰石被用于提高人牙的抗龋作用。制备方法和含氟比率的优化自然地是烧结作用的关键。在当前研究中,我们依据根据氢氧磷灰石–氟化钙系统的烧结反应分析了氟化氢氧磷灰石分子特征。运用傅立叶变换红外分光谱技术检验磷灰石的...氟化氢氧磷灰石被用于提高人牙的抗龋作用。制备方法和含氟比率的优化自然地是烧结作用的关键。在当前研究中,我们依据根据氢氧磷灰石–氟化钙系统的烧结反应分析了氟化氢氧磷灰石分子特征。运用傅立叶变换红外分光谱技术检验磷灰石的分子特征。氟化氢氧磷灰石由不同比例组合的氢氧磷灰石和氟化钙烧结形成。在傅立叶变换红外分光谱分析之下,氟化氢氧磷灰石复合物显示OH F HO和OH F氢键吸收带。当氟化钙内容逐渐增量,光谱分析序列显示首先伸展方式振动的OH F,跟随OH F HO摆动方式振动,终于OH F摆动方式振动。所以,本研究根据烧结理论和傅立叶变换红外分光谱分析建立磷灰石超分子模型为烧结氟化氢氧磷灰石提供分子结构理论基础。展开更多
Magnesium and its alloys have attracted great attention as biocompatible and degradable biomaterials recent years.But their corrosion rate has been proved to be too high,which limits their biomedical application great...Magnesium and its alloys have attracted great attention as biocompatible and degradable biomaterials recent years.But their corrosion rate has been proved to be too high,which limits their biomedical application greatly.In order to improve the corrosion resistance,nano-fluoridated apatite(FA) coating was prepared on ZK60 magnesium alloy by a simple chemical conversion method.The FA coating showed a needle-like morphology.The polarization curves and EIS plots indicated that the FA coating improved the corrosion potential by 125 mV and doubled the polarization resistance of the magnesium alloy,meanwhile decreasing the corrosion current by two orders of magnitude of the substrate in simulated body fluid.The MTT assay indicated good cytocompatibility of L-929 cells with the fluoridated apatite coated magnesium alloy.展开更多
文摘氟化氢氧磷灰石被用于提高人牙的抗龋作用。制备方法和含氟比率的优化自然地是烧结作用的关键。在当前研究中,我们依据根据氢氧磷灰石–氟化钙系统的烧结反应分析了氟化氢氧磷灰石分子特征。运用傅立叶变换红外分光谱技术检验磷灰石的分子特征。氟化氢氧磷灰石由不同比例组合的氢氧磷灰石和氟化钙烧结形成。在傅立叶变换红外分光谱分析之下,氟化氢氧磷灰石复合物显示OH F HO和OH F氢键吸收带。当氟化钙内容逐渐增量,光谱分析序列显示首先伸展方式振动的OH F,跟随OH F HO摆动方式振动,终于OH F摆动方式振动。所以,本研究根据烧结理论和傅立叶变换红外分光谱分析建立磷灰石超分子模型为烧结氟化氢氧磷灰石提供分子结构理论基础。
基金supported by the Program for Young Excellent Talents in Tongji University (Grant No. 2009KJ003)"Chen Guang" project(Grant No. 10CG21) supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation
文摘Magnesium and its alloys have attracted great attention as biocompatible and degradable biomaterials recent years.But their corrosion rate has been proved to be too high,which limits their biomedical application greatly.In order to improve the corrosion resistance,nano-fluoridated apatite(FA) coating was prepared on ZK60 magnesium alloy by a simple chemical conversion method.The FA coating showed a needle-like morphology.The polarization curves and EIS plots indicated that the FA coating improved the corrosion potential by 125 mV and doubled the polarization resistance of the magnesium alloy,meanwhile decreasing the corrosion current by two orders of magnitude of the substrate in simulated body fluid.The MTT assay indicated good cytocompatibility of L-929 cells with the fluoridated apatite coated magnesium alloy.
