聚丙烯酸钠存在下蝶状文石型碳酸钙的合成研究

摘要

The butterfly-like aragonite calcium carbonate particles were successfully prepared through the precipitation reaction of Na2CO3 with CaC12 in the presence of polyacrylic acid sodium(PAAS)and characterized with FESEM and XRD. The effects of the reaction temperature and the concentration of PAAS on the nucleation and growth of aragonite crystals were investigated. The possible growth mechanism of the particles was discussed. This method offers a route to adjust the ratio of aragonite and calcite in the products.%在聚丙烯酸钠（PAAS）存在下,采用沉淀反应法合成了蝶状文石型碳酸钙粒子,考察了反应温度和基质浓度等对于文石型晶体成核及生长的影响。通过FESEM、XRD等测试手段对其形貌和结构进行表征,并初步探讨了其生长机理。这一研究提供了一种通过改变基质用量来调节产物中的文石晶型和方解石晶型所占比例的方法。