摘要
研究了含酰胺基的聚乙烯吡咯烷酮模型分子调制下碳酸钙的体外仿生结晶。4h后在XRD上存在24.8°和27.1°衍射峰且在FTIR上观察到745cm-1和1490cm-1峰,表明聚乙烯吡咯烷酮能稳定碳酸钙的亚稳相,球霰石的存在时间从20min延长到4h。SEM研究表明,存在1～5μm的球霰石聚集微球,说明碳酸钙的结晶不是一步完成的,还包括随后的转变和组织。该模型体系的研究对于理解生物矿物机制和底端向上策略合成功能无机材料具有重要意义。
Effect of model macromolecule of poly（vinylpyrrolidone）（PVP） with amide group on the bimimetic crystallization of calcium carbonate（CaCO3 ） in vitro is investigated. There are 24. 8°, 27. 1° peaks on XRD pattern and 745cm-1 , 1490cm-1 on FTIR, which demonstrate that PVP macromolecule stabilizes the metastable phase of CaCOa, vaterite at early stage with duration time from 20min to 4h. SEM results indicate that the discrete vaterite can be integrated into 1-5μm vaterite microsphere, which suggest that the crystallization of CaCO3 is not achieved in one step but involves the subsequent phase transformation. Research on this model system for understanding the mechanism of biomineralization and synthesis of functional inorganic nanomaterials in bottom-up strategy are important.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2010年第8期41-43,共3页
Materials Reports
基金
江苏省博士后科研资助计划项目(0901080C)
南京林业大学高学历人才基金项目(163020051)
关键词
聚乙烯吡咯烷酮
碳酸钙
相变
微球
poly（vinylpyrrolidone）, calcium carbonate, phase transformation, microsphere
