聚苯乙烯磺酸钠/L-谷氨酸协同作用下新型碳酸钙微球的简易合成

Facile synthesis of the novel calcium carbonate microspheres by the synergistic effect of PSSS and L-Glutamic acid

聚苯乙烯磺酸钠(PSSS)/L-谷氨酸(L-Glu)二元体系中,利用缓慢扩散的CO2与在有机-无机界面上富集的钙离子相结合,合成了碳酸钙微球。实验表明,PSSS/L-Glu浓度比对碳酸钙晶体的形貌和晶型有着重要影响。通过改变实验条件,还得到了菱形和立方形晶体。取向聚积理论很好地解释了微球晶体的形成。PSSS/L-Glu间的协同作用在晶体化过程中发挥着重要作用。通过X射线粉末衍射仪、透射电镜、扫描电子显微镜等分析手段对产物进行了表征。

Calcium carbonate microspheres were synthesized using enriched Ca2＋ ions at organic-inorganic interfaces with the slowly infused COp gas in a system of poly （ sodium 4-styene-sulfonate） （PSSS）/L-Glutamic acid （L-Glu）. The experiments showed that the concentration ratio between PSSS and L-Glu played important roles in the morphology and polymorph of calcium carbonate. Crystals with rectangle-like and cube-like morphology were obtained besides microspheres by adjusting the experimental parameters. The oriented aggregation mechanism accounted for the formation process of the microsphere crystals. The synergistic effect of PSSS and L-Glu was considered to play an important part in the crystalliza- tion~ The products were characterized by X-ray powder diffraction, transmission electron microscopy, and scanning electron microscopy.