| 初始钙-磷物质的量比值对超长羟基磷灰石纳米纤维微观结构的影响 |
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| 引用本文： | 王银川,肖桂勇,徐伟莉,齐美丽,颜文熙,武延秋,吕宇鹏.初始钙-磷物质的量比值对超长羟基磷灰石纳米纤维微观结构的影响[J].无机化学学报,2022,38(4):620-628. |
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| 作者姓名： | 王银川 肖桂勇 徐伟莉 齐美丽 颜文熙 武延秋 吕宇鹏 |
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| 作者单位： | 山东大学, 材料液固结构演变与加工教育部重点实验室, 济南 250061;山东大学材料科学与工程学院, 济南 250061;山东交通学院交通土建工程学院, 济南 250357;生物医用材料改性技术国家地方联合工程实验室, 德州 251100 |
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| 基金项目： | 山东省自然科学基金(No.ZR2017MEM014,ZR2020QE070)、山东省人力资源和社会保障厅博士后创新项目(No.202002050)和中国博士后科学基金资助项目(No.2019M652380)资助。 |
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| 摘 要： | 羟基磷灰石(HA)晶体的形核和生长与表面活性剂、初始钙-磷物质的量比值(nCa,0/nP,0)密切相关。因此，本研究以油酸为表面活性剂制备高柔韧超长HA纳米纤维，利用X射线衍射(XRD)、FTIR、场发射扫描电镜(FESEM)和能量色散X射线谱(EDS)探究了不同nCa,0/nP,0对HA纳米纤维微观结构的影响，并基于产物微观结构演变提出HA纳米纤维的形成机制。nCa,0/nP,0=0.8~1.2有利于高结晶超长柔韧HA纳米纤维的合成，而过高和过低的nCa,0/nP,0会导致油酸诱导HA沿c轴择优生长的作用减弱，进而导致非晶绳结状或低结晶纳米针束状产物的形成。HA晶体的择优生长方向随nCa,0/nP,0的降低由a轴向c轴转变，但过低的nCa,0/nP,0导致HA晶体倾向同时沿a轴和c轴生长。
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| 关 键 词： | 羟基磷灰石 纳米纤维 油酸 初始钙-磷物质的量比值 |
| 收稿时间： | 2021/10/18 0:00:00 |
| 修稿时间： | 2022/2/22 0:00:00 |
Effect of Initial Calcium-Phosphorus Molar Ratio on Microstructure of Ultralong Hydroxyapatite Nanofibers |
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| Institution: | Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China;School of Materials Science and Engineering, Shandong University, Jinan 250061, China;School of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China;National United Engineering Laboratory for Biomedical Material Modification, Dezhou, Shandong 251100, China |
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| Abstract: | The nucleation and crystal growth of hydroxyapatite (HA) crystals are closely related to surfactants and the initial calcium-phosphorus molar ratio (nCa,0/nP,0). In this work, HA nanofibers with high flexibility and aspect ratio have been synthesized by using oleic acid as the surfactant. The effect of nCa,0/nP,0 on the microstructures of the as-prepared products was investigated by X-ray diffraction (XRD), FTIR, field emission scanning electron microscope (FESEM), and energy-dispersive X-ray spectra (EDS). The formation mechanisms of HA nanofibers were proposed to better explain the effect of oleic and nCa,0/nP,0 based on the microstructure evolution. Ultralong HA nanofibers with high crystallinity and flexibility were synthesized with nCa,0/nP,0=0.8-1.2, but too high and too low nCa,0/nP,0 will weaken the effect of oleic acid in inducing the preferential growth of HA along the c axis, which lead to the formation of amorphous knotted or low crystalline nanoneedle bundle-like products, respectively. The preferred growth direction of HA changes from a-axis to c-axis with the decrease of nCa,0/nP,0, but too low nCa,0/nP,0 causes HA to tend to grow along the a-axis and c-axis at the same time. |
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| Keywords: | hydroxyapatite nanofiber oleic acid initial calcium-phosphorus molar ratio |
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