矿物填料表面无机包覆改性研究  

Research on Surface Inorganic Modification of Mineral Filler

作　　者：杨玉芬[1] 盖国胜[1] 樊世民[1] 陈清如[2] 

机构地区：[1]清华大学材料科学和工程系 [2]中国矿业大学化工学院,江苏徐州221008

出　　处：《中国矿业大学学报》2005年第3期279-283,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50474003)

摘　　要：根据非均匀形核原理,采用合理工艺参数在均匀分散的CaO-H2O-CO2体系中,实现了矿物颗粒表面的纳米化包覆;分析了矿物颗粒表面纳米化修饰机理;用SEM、XRD和BET等检测技术对包覆前后的矿物颗粒进行了表征;与未包覆颗粒相比,复合颗粒不仅具有纳米颗粒的性能,同时还改善了微米颗粒的表面,使尖锐的棱角被钝化,平整光滑的解理面也因纳米级颗粒的修饰而变得粗糙,比表面积增加了300%以上.填充试验表明:复合矿物粉体在PP中填充,其粗糙的表面提高了与聚合物的相容性,缓解甚至消除了未包覆颗粒尖锐棱角和平整解理面所造成的复合材料内部的局部应力集中问题.Based on the principle of heterogeneous nucleation, nanostructured modification of inorganic mineral surfacehas has been realized using suitable technical parameters in an uniformly dispersed Ca(OH)_2-H_2O-CO_2 system. The surface nanostructured modification mechanism is analyzed. Properties of both uncoated and coated mineral particles were examined with SEM, XRD, and BET. Compared to the uncoated mineral particles, the coated particles with blunt edge angles and rough surface exhibit not only outstanding properties of nano-sized particles but also improved surface morphology. The specific surface area of the coated particles increases by more than 300 %. The composite PP materials filled by the coated particles can reduce or avoid local stress concentration within the composites formed by sharp edges and flat cleavage plate of traditional pulverized particle filled in polymer, and the rough surface can improve interfacial compatibility between inorganic materals and polymer.

关 键 词：改性研究 无机包覆 矿物填料 表面纳米化修饰 应力集中问题 矿物颗粒 包覆颗粒 非均匀形核 纳米级颗粒 均匀分散 工艺参数 颗粒表面 检测技术 纳米颗粒 复合颗粒 矿物粉体 比表面积 复合材料 解理面 CO2 H2O CaO SEM BET 

分 类 号：TQ931[化学工程] TB383[一般工业技术—材料科学与工程]