摘要
以可溶性淀粉、β-环糊精及十二烷基硫酸钠(SDS)为模板,在CaCl2、Na2CO3体系中调控合成CaCO3晶体.研究了不同形貌CaCO3晶体成型原因.分别用红外光谱(FT-IR)、X射线衍射仪(XRD)、扫描电镜(SEM)等技术对晶体的形貌和结构进行了观察和表征.结果表明:可溶性淀粉溶液中5 d后得到以球霰石为主的球形CaCO3;环糊精溶液中5 d后得到以球霰石为主的CaCO3层状聚集体,随着结晶时间的延长,产物中球霰石逐渐向方解石转化,SDS的加入加快了球霰石向方解石的转化速度.
Calcium carbonate was prepared by the sodium carbonate with calcium chloride in the prensence of soluble starch, β-cyclodextrin and sodium dodecyl sulfate as the template. The products were analyzed by Fourier transform infrared spectroscopy （KF-IR）, X-ray diffraction （XRD） and scanning electron microscopy （SEM）, respectively. The results showed that the calcium carbonate precipita- ted in the soluble starch solution for five days was the vaterite, and in the β-cyclodextrin solution for five days the layered aggregates with the vaterite crystal were obtained. The vaterite gradually transformed to the calcite. Thus, the sodium dodecyl sulfate accelerated the transformation of the vaterite to the calcite.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2010年第1期50-54,共5页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家自然科学基金资助项目(20576055)
关键词
可溶性淀粉
Β-环糊精
晶体形貌
碳酸钙
soluble starch
β-cyclodextrin
crystal morphology
calcium carbonate
