矿物颗粒表面纳米化修饰及其在PP复合材料中的应用  

PREPARATION OF INDUSTRIAL MINERAL COMPOSITE POWDERS AND THE APPLICATION IN PP COMPOSITES

作　　者：樊世民[1] 杨玉芬[1] 盖国胜[1] 付绍云[2] 张以河[2] 苗赫濯[1] 

机构地区：[1]清华大学材料科学与工程系粉体工程研究室,北京100084 [2]中国科学院理化技术研究所,北京100080

出　　处：《复合材料学报》2005年第1期68-73,共6页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金项目(50474003)

摘　　要：　通过化学方法成功地实现了矿物粉体在Ca(OH)2 H2O CO2体系中的表面纳米化修饰,即在微米级重质碳酸钙、硅灰石粉体表面形核生成粒径均匀的纳米碳酸钙颗粒层。研究表明,表面纳米化修饰后的矿物粉体表面的粗糙度大大增加,尖锐的棱角得以钝化,纳米化修饰后矿物粉体比表面积比原来提高至少200%以上。将经表面纳米化修饰后的硅灰石粉体在聚丙烯(PP)中填充应用,较未经表面纳米化修饰的硅灰石粉体填料,其抗冲击强度提高65%以上,延伸率提高200%以上。The mineral composite particles with rough surfaces and blunt edge angles, coated by nanometer calcium carbonate with a particle size range of 20-100 nm, were successfully prepared by a chemical method in Ca(OH)2-H2O-CO2 system. The specific surface area of the composite powders increased twice or above after coating. It is exhibited that polypropylene (PP) composites filled by the composite powders with nano-structure surface have better properties because the nano-structured mineral powders have bigger surface areas which would lead to more interfacial compatibility between powders and polymer matrix when the powders are filled into the polymer and moreover, the blunt edge angles would reduce the stress concentration at angles, compared with un-coated powders as filler.

关 键 词：矿物粉体 表面纳米化修饰 表面改性 应用 

分 类 号：TB332[一般工业技术—材料科学与工程] TB383