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以苯乙烯(St)、二乙烯苯(DVB)为共聚单体、MAA为功能单体,以十二烷基苯磺酸钠(SDBS)和油酸(OA)为双层表面活性剂修饰的磁性γ-Fe2O3为磁性来源,制备表面亲水性的磁性无机-有机复合材料。详细探讨了功能单体MAA对磁性复合材料中磁含量和复合材料表面亲水性能的影响。分别用扫描电子显微镜(SEM)、光学显微镜(OM)、热重分析仪(TGA)及吸水率对磁性复合材料的形貌、磁性粒子分布情况、磁含量、表面亲水性等进行表征。结果表明,随着MAA浓度的增加,磁性复合粒子的粒径变小且分布变窄,复合材料的磁含量增加和表面亲水性增强。SEM和OM测试表明,磁性聚合物复合粒子球形度好且粒径分布变窄,磁性复合材料的稳定性好,磁粉含量高达17.81%。
Using styrene (St) and divinylbenzene (DVB) as comonomers, MAA as a functional monomer, modified with sodium dodecyl benzene sulfonate (SDBS) and oleic acid (OA) Magnetic γ-Fe2O3 is a magnetic source, preparing a surface hydrophilic magnetic inorganic-organic composite material. The effects of functional monomer MAA on magnetic content and hydrophilicity of composite surface were discussed in detail. The morphology, magnetic particle distribution, magnetic content and surface hydrophilicity of the magnetic composites were characterized by scanning electron microscopy (SEM), optical microscope (OM), thermogravimetric analysis (TGA) and water absorption. The results show that with the increase of MAA concentration, the particle size of the magnetic composite particles becomes smaller and the distribution becomes narrower, the magnetic content of the composite material increases and the surface hydrophilicity increases. SEM and OM tests show that the magnetic polymer composite particles have good sphericity and narrow particle size distribution, and the magnetic composite material has good stability and the magnetic powder content reaches as high as 17.81%.