CTAB与SDBS对碳酸锶粒子生长形态调控及机理研究

以表面活性剂CTAB和SDBS为化学添加剂,采用化学共沉淀法对碳酸锶晶体的生长形态进行调控,成功地制备出了实心的树枝状和花瓣为空心的花状碳酸锶粉体,并用X射线衍射(XRD)、扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)等分析手段对样品进行了表征;最后重点对化学添加剂可能产生的影响机理进行了初步的探讨.结果表明,CTAB和SDBS在晶体生长的过程中能起到显著的影响作用,两者对粒子分散性能的作用效果相反,而且后者对晶体(013)和(213)晶面表面能降低的贡献明显大于前者.

Regulation and Mechanism of CTAB and SDBS on SrCO3 Particles Morphology

Solid dendritic and hollow flower-like SrCO3 particles have been synthesized via adding surfactants CTAB and SDBS as chemical additives to regulate the morphology of the crystal. The samples were characterized by X-ray diffraction (XRD),scanning electronic microscope (SEM) and Fourier transform infrared spectrograph (FT-IR); the preliminary effect mechanisms of chemical additives to SrCO3 crystal have been discussed chiefly in the end. Results show that CTAB and SDBS could play a significant role in influencing the particles' property,which take an opposite action to the property of the particles' dispersion and the latter has a stronger ability in reducing the surface energy of the (013) and (213) crystal faces than the former.