以蛋清蛋白及半透膜为模板调控碳酸钙的仿生合成

依据生物矿化的基本原理,以蛋清蛋白为基质,透析袋组成隔室,在仿生条件下,诱导碳酸钙的合成。扫描电子显微镜和红外测试结果表明,半透膜和蛋白质虽然直接影响碳酸钙的形貌,但在半透膜和蛋清蛋白调控下生成的碳酸钙均为球霰石型晶体。实验结果表明,半透膜的选择性透过功能不仅限制了蛋白质的自由移动,同时也限制了蛋白质和Ca2+配合物的自由移动,从而为制备特殊形貌的碳酸钙固体提供了基础。

Biomimetic Synthesis of Calcium Carbonate with Egg White Protein/Dialysis Bag Template

Based on the basic principles of biomineralization,calcium carbonate was induced by egg white protein(EWP) in the dialysis bag compartment under biomimetic conditions.The different morphology and polymorphy of calcium carbonate were characterized by SEM and FT-IR spectra.The results showed that calcium carbonates were all vaterite under different conditions except in the distilled water.Dialysis bag limited not only the movement of protein,but also the movement of the coordination compound of Ca2+-egg white protein,and provided a solid foundation to prepare a special morphology of calcium carbonate.