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采用一步乳液聚合法,调节引发剂用量,制备了不同粒径的具有核壳结构的功能性聚(苯乙烯-丙烯酰胺)乳胶微球.用透射电子显微镜表征了乳胶微球的核壳结构和粒径,所制微球的粒径分别为195,217,234和255 nm.用红外光谱对微球的化学成分进行了表征,证实聚丙烯酰胺已包覆在聚苯乙烯外层.通过竖直沉积自组装法制备了聚合物微球的光子晶体薄膜.扫描电子显微镜表征了所制光子晶体膜的表面形貌,反射和透射光谱表征了光子禁带.结果表明,聚合物微球以面心立方紧密堆积,其(111)面与基底平行;微球粒径不同,光子晶体的光子禁带不同.制备了不同光子禁带的光子晶体,禁带分别位于473,515,574和630 nm,相应的薄膜分别呈蓝色、绿色、黄色和红色,对于光子晶体的拓展和应用具有重要的意义.
A one-step emulsion polymerization method was used to adjust the amount of initiator to prepare the functional poly (styrene-acrylamide) latex microspheres with core-shell structure with different particle sizes. The core-shell structure of the latex microspheres was characterized by transmission electron microscopy The diameters of the prepared microspheres were 195, 217, 234 and 255 nm, respectively.The chemical composition of the microspheres was characterized by infrared spectroscopy, and the results showed that the polyacrylamide was coated on the outer layer of polystyrene.Self- The photonic crystal films of polymer microspheres were prepared by SEM.The surface morphologies of the prepared photonic crystal films were characterized by scanning electron microscopy and the photonic band gaps were characterized by reflection and transmission spectra.The results show that the polymer microspheres are tightly packed with face-centered cubic , The (111) plane is parallel to the substrate; photonic crystals with different photonic band gaps are different in different diameter of the microspheres. Photonic crystals with different photonic band gaps are prepared at 473, 515, 574 and 630 nm, respectively, and the corresponding films are blue , Green, yellow and red, have important meanings for the development and application of photonic crystals.