无定形碳酸钙的稳定性和结晶转化过程研究进展

Research Progress on the Stability and Crystallization Pathway of Amorphous Calcium Carbonate

无定形碳酸钙在具有多级结构和优异力学性能的碳酸钙矿物的形成过程中起着至关重要的作用。生物体可以非常精确地调控无定形碳酸钙的结晶转化过程,而化学合成的无定形碳酸钙通常很不稳定。因此,从化学的角度研究无定形碳酸钙的稳定机理以及无定形碳酸钙结晶转化过程,对于理解以无定形物相为前驱体的生物矿物形成过程具有非常重要的意义。综述了无定形碳酸钙的本征特性,以及环境因素和添加剂对其稳定性和结晶转化的影响,阐述了无定形碳酸钙在晶体生长过程中的作用,讨论了该领域对材料结构和特性调控方面的启示。

Amorphous calcium carbonate(ACC)plays a very important role in the formation of calcium carbonate minerals with a multi-level hierarchical structure and excellent mechanical properties.Organisms can accurately regulate the crystallization process of ACC,while synthetic ACC is usually very unstable.Therefore,studying the stabilization mechanism of ACC and the crystallization process of ACC from a chemical perspective is of great significance for understanding the formation process of biominerals via an amorphous precursor.This article summarizes the intrinsic properties of ACC,and the influence of environmental conditions and additives on crystallization process,explains the role of ACC during the crystallization process,and discusses the implications of this field on the regulation of material structure and properties.