矿物颗粒表面纳米化修饰及其在PP 复合材料中的应用

樊世民; 杨玉芬; 盖国胜; 付绍云; 张以河; 苗赫濯

矿物颗粒表面纳米化修饰及其在PP 复合材料中的应用

1.
清华大学材料科学与工程系粉体工程研究室, 北京 100084;
2.
中国矿业大学北京校区化学与环境工程学院, 北京 100083;
3.
中国科学院理化技术研究所, 北京 100080

基金项目: 国家自然科学基金项目(50474003)

详细信息

通讯作者:
盖国胜,博士,副研究员,主要从事粉体表面包覆、粉体工程技术、设备方面研究 E-mail:guosheng@public3.bta.net.cn

中图分类号: TB332;TB383
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出版历程
- 收稿日期: 2004-02-12
- 修回日期: 2004-03-29
- 刊出日期: 2005-02-14

PREPARATION OF INDUSTRIAL MINERAL COMPOSITE POWDERS ANDTHE APPLICATION IN PP COMPOSITES

1.
Powder Technology R &|D Group, Department of Material Science and Engineering, Tsinghua University, Beijing 100084, China;
2.
School of Chemistry and Environmental Engineering, China University of Mining andTechnology (Beijing), Beijing 100083, China;
3.
Technical Institute of Physics and Chemistry, Chinese Academy ofSciences, Beijing 100080, China

摘要

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。
- 矿物粉体 /
- 表面纳米化修饰 /
- 表面改性 /
- 应用
Abstract: e 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 thatpolypropylene (PP) composites filled by the composite powders with nano-structure surface have better properties becausethe nano-structured mineral powders have bigger surface areas which would lead to more interfacial compatibility betweenpowders 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.
- mineral powder /
- nano-structure surface /
- surface modification /
- application