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以超声分散辅助双层表面活性剂十二烷基苯磺酸钠(SDBS)和油酸(OA)处理的磁性粒子为磁性来源,选用苯乙烯(St)、二乙烯苯(DVB)和甲基丙烯酸(MAA)分别作为聚合单体、交联剂和功能基单体,采用改进的悬浮聚合法制备出多孔磁性高分子微球,并采用扫描电子显微镜(SEM)、光学显微镜(OA)和热重分析仪(TG)对磁性微球表面形貌、粒径分布及磁含量等进行了表征,详细探讨了MAA用量、超声分散时间、搅拌速度和分散剂浓度等因素对磁性多孔微球磁含量及粒径分布的影响.
The magnetic particles treated with ultrasonic dispersing secondary surfactant (SDBS) and oleic acid (OA) were magnetic sources. Styrene (St), divinylbenzene (DVB) and methyl (MAA) were used as monomers, cross-linking agents and functional monomers respectively. The porous magnetic polymer microspheres were prepared by the improved suspension polymerization. The microstructure of the porous magnetic polymer microspheres was characterized by scanning electron microscopy (SEM), optical microscope The surface morphology, particle size distribution and magnetic content of magnetic microspheres were characterized by TG, and the effects of MAA dosage, ultrasonic dispersion time, stirring speed and dispersant concentration on magnetic properties of magnetic porous microspheres And particle size distribution.