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首页> 外文期刊>Materials science & engineering >Mechanochemical synthesis of hydroxyapatite using cuttlefish bone and chicken eggshell as calcium precursors
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Mechanochemical synthesis of hydroxyapatite using cuttlefish bone and chicken eggshell as calcium precursors

机译：以墨鱼骨和鸡卵壳为钙前驱体的机械化学合成羟基磷灰石

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This work explores the possibility of synthesising hydroxyapatite via mechanochemical route using biogenic calcium carbonate sources, namely calcite in chicken eggshell and aragonite in cuttlebone. The calcium source and orthophosphoric acid in ratio complying with Ca/P = 1.67 were submitted to high-energy ball milling with transferred energy values in the 1.6 to 123.0 kWh/g range, in the presence of 6.4 wt% water.Results show that increasing transferred energy results in CaCO3 - DCPD - HA reaction sequence when the used calcium source is cuttlebone, and in CaCO3 - DCPD - DCPA - HA when eggshell is used. The produced calcium orthophosphates exist in delimited energy transfer ranges; HA forms monophasic regions at the highest transferred energy ranges tested. 52.5 kWh/g is the minimum energy value for hydroxyapatite formation starting from eggshell, while only 6.2 kWh/g is required starting from cuttlebone. Calcium orthophosphate dimensionality depends on the supplied energy and on the starting CaCO3 polymorph, and includes nanospheres and nanoplates, and more complex flower-like geometries built from individual nanoparticles. Milling maps were built to systematise the effect of initial CaCO3 polymorph and transferred milling energy on the conditions for hydroxyapatite mechanochemical formation.Obtained results demonstrate the potential of chicken eggshell and cuttlefish bone as natural precursors to produce hydroxyapatite, and the ability of high-energy milling as the corresponding processing route. This indicates an opportunity window for the development of reliable, scalable, fast and cost-effective HA production method.
机译：这项工作探索了利用生物碳酸钙源（即蛋壳中的方解石和硬骨中的文石）通过机械化学途径合成羟基磷灰石的可能性。在6.4 wt％的水存在下，将比例符合Ca / P = 1.67的钙源和正磷酸进行高能球磨，其能量转移值在1.6至123.0 kWh / g范围内。当所使用的钙源为cut骨时，转移的能量导致CaCO3-> DCPD-> HA反应顺序，而使用蛋壳时，导致CaCO3-> DCPD-> DCPA-> HA。产生的正磷酸钙存在于有限的能量转移范围内。 HA在测试的最高转移能量范围内形成单相区域。从蛋壳开始形成羟磷灰石的最低能量值为52.5 kWh / g，而从cut骨开始仅需要6.2 kWh / g。正磷酸钙的尺寸取决于所提供的能量和起始的CaCO3多晶型物，包括纳米球和纳米板，以及由单个纳米粒子构成的更复杂的花状几何形状。建立了研磨图以系统化初始CaCO3多晶型物和转移的研磨能量对羟基磷灰石机械化学形成条件的影响。获得的结果证明了蛋壳和墨鱼骨作为天然前体产生羟基磷灰石的潜力以及高能研磨的能力作为相应的处理路径。这为开发可靠，可扩展，快速且经济高效的HA生产方法提供了机会。

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