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材料工程  2008 

纳米碳酸钙表面原位聚合包覆

, PP. 21-24

Keywords: 纳米碳酸钙,原位聚合,表面包覆

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Abstract:

通过超重力场制备了纳米碳酸钙,对纳米碳酸钙进行超声波分散,然后进行原位乳液聚合,采用分步聚合的方式,在纳米碳酸钙表面包覆了丙烯酸酯类共聚物,制得了纳米碳酸钙表面原位聚合包覆产物。采用TEM、DSC、TGA和表面电子能谱(ESCA)对纳米碳酸钙表面原位聚合包覆产物进行了表征。结果表明制备的纳米碳酸钙粒子粒径在20nm左右,通过原位乳液聚合包覆后,粒径在40~80nm,包覆后的纳米碳酸钙复合粒子表面几乎不含Ca元素,表明纳米碳酸钙被良好包覆,并形成了以纳米碳酸钙为核、PBA为中间层、MMA和EA、St共聚物为壳的三层结构有机-无机纳米复合粒子。

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