| 单分散纳米碳酸钙的制备和表征 |
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| 引用本文： | 徐国峰,王洁欣,沈志刚,陈建峰.单分散纳米碳酸钙的制备和表征[J].北京化工大学学报(自然科学版),2009,36(5):27-30. |
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| 作者姓名： | 徐国峰 王洁欣 沈志刚 陈建峰 |
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| 作者单位： | 纳米材料先进制备技术与应用科学教育部重点实验室;教育部超重力工程研究中心,北京,100029 |
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| 摘 要： | 采用微乳液法，利用Ca(NO3)2和Na2CO3在微乳液界面处发生反应，制备得到了分散性良好，尺寸大小为10nm左右的纳米碳酸钙。实验发现，油酸含量对碳酸钙分散性有重要影响，当油酸含量是碳酸钙质量的2.5%时，所制备的颗粒分散性良好。XRD检测结果表明，所得碳酸钙产品主要包含球霰石和方解石两种晶型；热重（TG）和差热（DSC）分析表明：包覆在纳米碳酸钙表面的改性剂质量分数与加入的油酸的量相吻合，这证明了油酸基本包覆在了碳酸钙粒子表面，从而改善了碳酸钙的分散性。
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| 关 键 词： | 微乳液法 油酸 球霰石 方解石 |
| 收稿时间： | 2009-01-08 |
Preparation of monodispersed nano-sized calcium carbonate |
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| XU GuoFeng,WANG JieXin,SHEN ZhiGang,CHEN JianFeng.Preparation of monodispersed nano-sized calcium carbonate[J].Journal of Beijing University of Chemical Technology,2009,36(5):27-30. |
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| Authors: | XU GuoFeng WANG JieXin SHEN ZhiGang CHEN JianFeng |
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| Institution: | 1.Key Lab for Nanomaterials, Ministry of Education;
2. Research Center of the M inistry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | Monodisperse nano sized calciu m carbonate particles with an average size distribution of 10 nm have been prepa red at the oil water interface using Ca(NO3)2and Na2CO3as reagents wi th a microemulsion method. The amount of oleic acid added was found to have an i mportant effect on the dispersity of the calcium carbonate. When the mass ratio of CaCO3 to oleic acid was 100∶2.5, the as prepared calcium carbonate nanop art icles had a good dispersity. Furthermore, XRD results indicated that the monodis perse calcium carbonate nanoparticles consisted mainly of vaterite with a small calcite content. TGA and DSC curves showed that the amount of oleic acid coating on the surface of CaCO3 particles undergoing decomposition was consistent wit h the amount of oleic acid added. |
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| Keywords: | microemulsion oleic acid vaterite calcite |
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