尾矿石英粉/PP复合材料制备与性能研究  

Preparation and Performance Study of Tailing Quartz Powder/PP Composite Materials

作　　者：葛英霞 武慧君[1,2] 郝小非[3,4] 李珍[1,2] 

机构地区：[1]纳米矿物材料及应用教育部工程研究中心,湖北武汉430074 [2]中国地质大学材料与化学学院,湖北武汉430074 [3]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [4]国家非金属矿资源综合利用工程技术中心,河南郑州450006

出　　处：《非金属矿》2014年第5期49-52,共4页Non-Metallic Mines

基　　金：国家科技支撑计划项目(2011BAB03B01)

摘　　要：为促进选矿钾长石尾矿石英粉的综合利用,分别用0.5%、1.0%、1.5%的硬脂酸对石英粉进行改性,并将改性后的粉体按10%、20%、25%、30%的添加量填充到PP复合材料中。利用红外光谱(FTIR)、接触角测量、扫描电子显微镜(SEM)及力学性能测试等方法对改性前后的粉体进行表征。结果表明:改性后粉体表面被有机化,接触角可达124°;硬脂酸改性可促进石英粉体在复合材料中分散,改善界面结合,增强复合材料的硬度和冲击强度。1%硬脂酸团聚现象少,改性效果最好,其含质量分数30%尾矿石英粉的复合材料可应用于车用一般零部件。In order to promote the comprehensive utilization of quartz coming from feldspar tailings, stearic acid of different concentration （0.5%, 1.0%, 1.5%） was used as modiifer for surface modiifcation of quartz powders. And then the PP composites with 10%, 20%, 25%, 30% quartz powders were synthesized. The modiifed and unmodiifed quartz powder was characterized by Fourier Transform Infrared Spectroscopy （FTIR）, Contact Angle Meter, Scanning Electron Microscopy （SEM） and Mechanics Performance Test. Results indicated that the modiifed surface was successfully organized and its contact angle was closed to 124°. The surface modiifcation improved the dispersion of quartz particles in PP, as well as the interfacial bonding. Mechanics performance test revealed an enhancement of the impact strength and hardness compared with pure quartz powder. 1% stearic acid performed best with less agglomeration,and the composites containing 30% tailing quartz powders may be applied to automotive parts.

关 键 词：尾矿 石英粉 硬脂酸 表面改性 聚丙烯(PP) 

分 类 号：TD926.42[矿业工程—选矿] TQ325.14[化学工程—合成树脂塑料工业]