摘要
采用微悬浮聚合的方法在纳米ZrO2粉体(经KH-570硅烷偶联剂处理)表面接枝聚甲基丙烯酸甲酯(PMMA).所得复合粉体由红外光谱鉴定甲基丙烯酸甲酯(MMA)单体在纳米ZrO2粉体表面的接枝情况.探讨单体浓度对接枝率和接枝效率的影响.对复合粉体的分散性进行研究并由透射电镜观察其形貌.结果表明:硅烷偶联剂在粉体表面进行预处理时,质量分数为4.5%(纳米ZrO2粉体质量)时表面包覆的效果最好;MMA在粉体表面的接枝率随单体浓度的增加而增加,而接枝效率在单体浓度较大时反而呈下降趋势;接枝后的复合粉体表面由亲水性转变为疏水性,由透射电镜(TEM)观察到的形貌显示在极性溶剂中分散良好.
By means of micro-suspension polymerization, the methyl methacrylate （MMA） monomer is grafted successfully at the surface of nano-ZrO2 particles （average size 50 nm） which were modified chemically by silane coupling agent （KH-570）. The structure of grafting polymer on the nanoparticles was characterized by FTIR. The effect of monomer concentration on the grafting ratio and grafting efficiency was also investigated. The results indicated that the grafting ratio increased with increase of the monomer concentration. The grafting efficiency, however, was declined, when the monomer concentration was higher. In addition, the morphology of ZrO2-g-PMMA and its dispersion property was also studied by TEM. It was found that the grafted particles exhibited a good dispersion in the organic solvent.
出处
《沈阳化工学院学报》
CAS
2007年第4期261-264,共4页
Journal of Shenyang Institute of Chemical Technolgy
基金
安徽省青年教师基金项目资助(2006JQ1009)
