摘要
采用聚乙烯亚胺 (PEI)作为表面活性剂对工业用SiC粉体进行表面改性处理 ,研究了改性前后SiC粉体的流动特性以及PEI加入量和 pH值的影响 .实验结果表明 :PEI加入量为 3% (质量分数 )、pH值为 6 5时 ,改性后的SiC粉体取得较好的流动特性和较高的饱和吸附量 ,颗粒分散较好 ,颗粒尺寸和形状较为均匀 .
The surface modification of industrial SiC powders was carried out by polyethyleneimine (PEI), and the effects of pH and adding content of PEI on flow characteristics of SiC powders before and after modified treatment were analyzed. The results were: when pH of PEI is 6.5 and the mass fraction of PEI is 3%, the modified SiC powder possessed better flow characteristics, more saturation adsorption on the powder surface, more dispersive and uniform particle size distribution and shape.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2004年第5期800-804,共5页
CIESC Journal
基金
国家 8 63 70 4青年基金资助项目(No 2 0 0 2AA745 10 0 )~~
关键词
表面活性剂
SIC粉体
聚乙烯亚胺
流动特性
Chemical modification
Flow of solids
pH
Powders
Silicon carbide
Surface active agents
