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采用无皂乳液聚合技术,以过硫酸钾(KPS)为引发剂、碳酸氢钠(NaHCO3)为缓冲剂、丙烯酸(AA)为共聚单体制备了表面含羧基的单分散聚苯乙烯(PS)颗粒。用悬浮液滴蒸发自组装技术制备了三维有序胶体晶体微球。采用傅立叶变换红外光谱(FT-IR)和扫描电子显微镜(SEM)对样品结构和形貌进行表征。结果表明,聚苯乙烯颗粒粒径分布均匀,单分散性好且具有良好的球形度,丙烯酸的共聚使颗粒带有羧基而实现功能化改性。离子强度、引发剂浓度和共聚单体浓度是影响聚苯乙烯颗粒尺寸大小的重要因素。胶体晶体呈规则球形,聚苯乙烯颗粒紧密排列,形成面心立方(fcc)结构,表面表现为六方紧密有序排列。
Using soap-free emulsion polymerization technology, monodisperse polystyrene (PS) with carboxyl groups on the surface was prepared by using potassium persulfate (KPS) as initiator, sodium bicarbonate (NaHCO3) as buffer and acrylic acid (AA) as comonomer. Granules. Three-dimensional ordered colloidal crystal microspheres were prepared by suspension evaporation and self-assembly technique. The structure and morphology of the samples were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The results show that polystyrene particles have uniform particle size distribution, good monodispersity and good sphericity. Copolymerization of acrylic acid makes the particles carry carboxyl groups to realize functional modification. Ionic strength, initiator concentration and comonomer concentration are important factors affecting the size of the polystyrene particles. Colloidal crystals were regularly spherical, polystyrene particles arranged closely to form a face-centered cubic (fcc) structure, the surface showed six closely arranged.