PAMAM树形分子对CaCO_3结晶影响的研究  

The Influence of PAMAM Dendrimers Containing DifferentTerminal Groups on the Crystallization of CaCO_3

作　　者：崔艳霞[1] 罗运军[1] 李国平[1] 

机构地区：[1]北京理工大学化工与材料学院,北京100081

出　　处：《无机化学学报》2002年第11期1093-1096,共4页Chinese Journal of Inorganic Chemistry

基　　金：教育部跨世纪优秀人才培养计划基金资助项目。

摘　　要：研究了不同端基的聚酰胺胺(PAMAM)树形分子对CaCO3在水溶液中结晶的影响。分别利用傅立叶变换红外光谱(FTIR)、X-射线衍射(XRD)、扫描电镜(SEM)等测试手段对样品进行了分析。结果表明:没有树形分子存在时CaCO3是粒径为10μm的菱形方解石晶体;端基为-COONa的树形分子存在时CaCO3则是粒径为1～2μm的球形球霰石晶体;-COOCH3端基PAMAM树形分子存在时得到的CaCO3是方解石晶体和球霰石晶体的混合体;而-NH2端基PAMAM树形分子存在时得到的CaCO3也是菱形方解石晶体,说明端基为-COONa树形分子是一种很好的晶体改性剂,分析可能是-COONa端基和树形分子特殊的球形支化结构协同作用影响了CaCO3晶体。The influence of the poly(amidoamine)(PAMAM) dendrimers with different terminal groups on the crystallization of CaCO3 in aqueous solution was studied. The crystals of CaCO3 were analyzed by means of FTIR, XRD, SEM, respectively. The results show that the crystallization of CaCO3 in the presence of PAMAM dendrimer containing COONa terminal groups at the external surface resulted in the formation of spherical vaterite crystals with the size of 1～2μm, whereas rhombohedral calcite crystals with the size of 10μm were formed in the absence of additive and in the presence of PAMAM dendrimer containing NH2 terminal groups. So the dendrimers with COONa terminal groups are a kind of habit modifier and can influence on the crystal morphology and upon CaCO3 crystallization.

关 键 词：PAMAM 树形分子 CACO3 结晶 碳酸钙 聚酰胺胺 晶型控制 

分 类 号：TQ132.32[化学工程—无机化工]