Using amorphous CaCO₃ (ACC) to biomimic the crustacean exoskeleton and optimize the physical and chemical properties of the polymeric phase of ACC holds great promise. Controlling the ACC morphology and stability is key in this process. For this article, monodisperse ACC microspheres, with a high sphericity of 0.973 ± 0.001 and a hardness of 0.6755 GPa, were prepared using the gas diffusion method in the presence of Mg²⁺. Their hardness is 3.58–16 times greater than that ever reported before for ACC microspheres. The stability of ACC is strongly affected by environmental conditions. The liquid phase and high temperature are not conducive to its stability, but ACC microspheres do have high stability under ambient conditions. After 100 days under such conditions, only a small amount of crystallization occurs, and their spherical shape survives intact. This article provides guidance for the preparation of ACC biomimetic composites, sheds light on the biological function of ACC in crustacean exoskeletons, and improves the theoretical understanding of the mechanism of biomineralization.

中文翻译：

---

高硬度高球度单分散无定形碳酸钙微球的制备及稳定性

使用无定形 CaCO ₃ (ACC) 仿生甲壳类动物外骨骼并优化 ACC 聚合相的物理和化学性质具有广阔前景。控制 ACC 形态和稳定性是该过程的关键。对于本文，在 Mg ^{2+存在下使用气体扩散法制备了具有 0.973 ± 0.001 高球度和 0.6755 GPa 硬度的单分散 ACC 微球}. 它们的硬度比之前报道的 ACC 微球硬度高 3.58–16 倍。ACC 的稳定性受环境条件的强烈影响。液相和高温不利于其稳定性，但ACC微球在环境条件下确实具有很高的稳定性。在这种条件下 100 天后，只有少量结晶发生，球形完好无损。该文为ACC仿生复合材料的制备提供了指导，阐明了ACC在甲壳动物外骨骼中的生物学功能，提高了对生物矿化机制的理论认识。