特殊形貌碳酸钙的原位仿生可控合成、机理及其在聚氯乙烯填充体系中的基础研究

It is of great scientific significance and potential applications for fabricating inorganic superstructures and inorganic/organic nanocomposites using bio-inspired mineralization and natural self-assembly. This project focuses on controllable synthesis of inorganic crystals and superstructures via organic templates and self-assembly method. The interactions at organic-inorganic interfaces and mechanisms of self-assembly will be systematically investigated. Calcium carbonate with peculiar morphology can be obtained through effective control over the shape, size and structures of inorganic nanoparticles at the molecular level. Using organic substrates as templates, materials of calcium carbonate with different properties are to be synthesized via in situ biomimetic synthesis technology. The reaction mechanism between calcium carbonate and organic substrates is to be discussed. Then calcium carbonate /polyvinyl chloride (PVC) composites with excellent performance will be obtained. The mechanical property and handling characteristics are to be studied. The structure-activity relationship and controllable law are to be investigated in detail for the obained materials. The relationship between the structure of calcium carbonate and property of PVC materials is also to be summarized. Through optimizing experimental conditions, the novel controllable calcium carbonate materials with unusual morphologies can be obtained, which have good stability and wide application and excellent properties in PVC. It will lay the good foundation and provide a new thinking and supplement in theroy for the synthesis of inorganic materials.

运用模拟生物矿化过程及自组装技术合成具有特殊形貌的无机及无机/有机复合材料具有广阔的应用前景和科学价值。本项目致力于运用优化的有机功能团的模板作用以及自组装技术实现对无机晶体和超结构的可控制合成，系统研究有机-无机的分子界面的识别及纳米颗粒间的自组织的作用机制，实现分子水平上对无机粒子的形状和尺寸的有效控制，获得形状大小可控的碳酸钙粒子。利用原位仿生合成技术，以不同官能团的有机质为模板，合成具有特殊形貌和性质的碳酸钙材料，探讨反应机理，同时制备优良性能的碳酸钙/聚氯乙烯(PVC)复合材料，研究其力学性能和加工性能等。揭示改性碳酸钙与有机质之间的构效关系和可控规律，探索碳酸钙材料的结构与PVC性能的关系，总结规律，优化实验条件，力争获得形貌特殊、稳定性好、应用范围广并在PVC填充体系中具有优越性能的碳酸钙材料，为深入开展仿生矿化合成无机材料的应用研究提供理论补充。

模拟生物矿化过程，运用自组装技术合成具有特殊形貌的无机及无机/有机复合材料具有广阔的应用前景。本项目运用优化的无机、有机模板作用以及自组装技术实现了对无机晶体和超结构的可控制合成，系统地研究了有机-无机的分子界面的识别及纳米颗粒间自组装的作用机制，实现了分子水平上对无机粒子的形貌和尺寸的有效控制，获得了晶型、大小可控的碳酸钙粒子。利用原位仿生合成技术，以不同性质的添加剂（PAAS、DDP、PEG、氨基酸、硝酸盐等）为模板，合成具有特殊形貌（蝶状、球形、海螺状、花状、棒状、针状等）和性质的碳酸钙材料，并对其反应机理进行了深入探讨，同时制备了优良性能的碳酸钙/聚氯乙烯(PVC)复合材料，研究了其力学性能和加工性能等。揭示了改性碳酸钙与有机质之间的构效关系和可控规律，探索了碳酸钙材料的结构与PVC性能的关系，总结了规律，优化了实验条件，获得了形貌特殊、稳定性好，具有优越性能的碳酸钙材料，为深入开展仿生矿化合成无机材料的应用研究提供了理论依据和技术支撑。