Nanoscale characterizations of mineralized piezoelectric scaffolds
Nanoscale characterizations of mineralized piezoelectric scaffolds
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DOI：
10.1557/s43580-023-00600-7
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发表时间：
2023-06
期刊：
影响因子：
0.8
通讯作者：
N. Buettner;G. Kitchen;Mostafa Omar;Bohan Sun;H. Lee;S. Kang;A. Akono
中科院分区：
文献类型：
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作者：
N. Buettner;G. Kitchen;Mostafa Omar;Bohan Sun;H. Lee;S. Kang;A. Akono
受骨矿化过程的启发，我们研究了浸入矿物离子溶液中的压电样品的矿化。我们使用聚偏氟乙烯作为压电材料和10×模拟体液作为矿物溶液。三个合成材料系统的开发和使用扫描电子显微镜，X射线衍射，纳米压痕，划痕测试的特点。通过这些技术，我们可以深入了解矿化协议的特征如何影响矿物的微观结构，化学成分，晶体结构和机械性能。将固溶温度从25 °C提高到50 °C导致更大的堆积密度，大约是刚度的10倍和断裂韧性的4倍。胶原蛋白表面处理导致刚度沿着增加约7倍，同时断裂韧性具有潜在的各向异性。最后，磷酸钙矿物出现在压电支架上的低密度和高密度相。
Inspired by the mineralization process of bone, we have investigated mineralization on piezoelectric samples immersed in a solution with mineral ions. We have utilized polyvinylidene fluoride as a piezoelectric material and 10× simulated body fluid as a mineral solution. Three synthetic material systems were developed and characterized using scanning electron microscopy, X-ray diffraction, nanoindentation, and scratch testing. With these techniques, we provide insights into how the characteristics of the mineralization protocol affect the microstructure, chemical composition, crystal structure, and mechanical properties of the minerals. Increasing the solution temperature from 25 to 50 °C resulted in a greater packing density, roughly 10 times the stiffness and 4 times the fracture toughness. Collagen surface treatment resulted in roughly 7 times the stiffness along with potential anisotropy in the fracture toughness. Lastly, calcium phosphate minerals appear to pack in low-density and high-density phases on the piezoelectric scaffolds.