CAJ | 학술논문

采用共沉淀法制备了Fe3O4纳米粒子,用表面硅烷化改性得到分散性良好的纳米Fe3O4磁流体,以苯乙烯(St)、甲基丙烯酸甲酯(MMA)为单体,采用无皂乳液聚合法制备了羧基聚苯乙烯磁性微球.运用红外光谱(FT-IR)、透射电子显微镜(TEM)、X射线衍射(XRD)、振动样品磁强计(VSM)、热失重(TG)等手段,对复合微球的组成成分、形貌及粒径、磁学性能及 Fe3O4的含量进行了表征.结果表明,Fe3O4/PS 磁性微球粒径均匀,呈比较规整的球形,表面带羧基功能基团,磁响应性能与磁流体用量有关,最高饱和磁化强度为34.1A·m2/kg.
채용공침정법제비료Fe3O4납미입자,용표면규완화개성득도분산성량호적납미Fe3O4자류체,이분을희(St)、갑기병희산갑지(MMA)위단체,채용무조유액취합법제비료최기취분을희자성미구.운용홍외광보(FT-IR)、투사전자현미경(TEM)、X사선연사(XRD)、진동양품자강계(VSM)、열실중(TG)등수단,대복합미구적조성성분、형모급립경、자학성능급 Fe3O4적함량진행료표정.결과표명,Fe3O4/PS 자성미구립경균균,정비교규정적구형,표면대최기공능기단,자향응성능여자류체용량유관,최고포화자화강도위34.1A·m2/kg.
The Fe3O4 nanoparticles were prepared by method of coprecipitation, and consequently well dispersed Fe3O4 magnetic fluid modified with silane coupling were synthesized. The carboxyl polystyrene magnetic microspheres were prepared through emulsifier-free emulsion polymerization, employing styrene and methyl methacrylate as monomers. The properties of composite microspheres were characterized by FT-IR, TEM, XRD, VSM and TG etc. The results showed that carboxyl Fe3O4/PS magnetic microspheres were uniform and sphericity. The magnetic responsibility of the composite microspheres is related to the dosage of magnetic fluid. The maximum saturation magnetization is 34.1 A·m2/kg.