Biomimetic Controlling of CaCO3 and BaCO3 Superstructures by Zwitterionic Polymer

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• 作者：Shengjie Xu ; Zhangxin Ye ; Peiyi Wu
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2015
• 出版时间：August 3, 2015
• 年：2015
• 卷：3
• 期：8
• 页码：1810-1818
• 全文大小：516K
• ISSN：2168-0485

文摘

In this work, uniform calcium carbonate (CaCO₃) and barium carbonate (BaCO₃) crystals were synthesized under the control of poly(2-methacryloyloxyethylphosphorylcholine) (PMPC) via a simple gas鈥搇iquid diffusion reaction. Spherical CaCO₃ particles with six smooth facets symmetrically distributed on the surface were prepared and systemically characterized by means of TEM, SEM, XRD, Raman, TGA, and FTIR. Time-resolved experiments showed the spherical calcite crystals were transformed from amorphous calcium carbonate (ACC) in the early stage and underwent a dissolution鈥搑ecrystallization process in the later stage. For BaCO₃, dumbbell-shaped crystals that were formed by the dendritic aggregation of rod-like subunits with six sides were generated. Both the morphologies of CaCO₃ and BaCO₃ crystals could be effectively tuned by changing the crystallization time and concentration of PMPC. Finally, a possible crystallization mechanism for the formation of CaCO₃ and BaCO₃ particles under the control of PMPC was proposed based on the experiments.