Abstract: Hydrophobic calcium carbonate particles were prepared in situ via the carbonation route by mimicking biomineralization and modified by sodium stearate (NaSt) as a modifier. The modification effect of CaCO₃ was revealed by testing its active ratio，the value of oil absorption，whiteness and the contact angle. The products were characterized through a transmission electron microscope (TEM) and X-ray diffraction (XRD). Then the reaction mechanism was discussed preliminarily. When the dosage of modifier reaches to 2.0 %，the active ratio of CaCO₃ modified by NaSt is 99.9 %. Moreover，the contact angle is 121.62°. Thereby the theory support and synthesis methods will be offered for the preparation of biomimetic materials.

摘要： 根据生物矿化机理，利用碳化法，选用实验室自制的硬脂酸钠作为改性剂，原位合成出功能性梭形碳酸钙材料。产品的改性效果通过活化度、吸油值、接触角等性能测定。同时通过透射电子显微镜（TEM）和X射线衍射（XRD）等测试手段对产品结构和形貌进行表征，并对反应机理进行了初步探讨。实验结果表明，当硬脂酸钠用量达到2.0％（占碳酸钙理论值）时，产品活化度可达到99.9％，接触角为121.62°，从而为仿生矿化制备新材料提供了理论依据和合成手段。