摘要
通过调整配方,得到了不同粒径的微米级单分散聚苯乙烯(PS)胶体微球,利用优化的垂直沉积法将PS胶体微球自组装成高质量的蛋白石型光子晶体材料,并通过激光粒度分析仪、扫描电镜和红外光谱仪等实验手段研究其可控制备与红外波段光学特征.其中由1.00和1.20μm PS单分散胶体微球自组装成的三维光子晶体的禁带位置分别为2.25、2.47μm,符合理论计算结果.该材料可改变目标红外波段的辐射特征,未来有望应用于热障涂层材料和红外隐身技术等领域.
Colloidal photonic crystal is a type of novel artificial functional material, which can effectively control the propagation of light wave with high reflection by its photonic band gap. It has the advantages of low-cost,simple process of preparation and the potential of fabricating in large scale. When the band gap located in the infrared band, colloidal photonic crystal could effectively manage the heat radiation, and reduce the detectability in the infrared band. Thus, there is a great potential in the field of infrared stealth technology for the photonic crystal. An infrared material of colloidal photonic crystal with a low cost and easy preparation process is reported in this study. Micrometer monodisperse polystyrene（PS） colloidal microspheres with different particle sizes were obtained by formulation control. The effect of the formulation on the size of PS microspheres was also studied,and theoretical principles of influencing factors were stated. The structured two-dimensional photonic crystal materials were prepared by gas-liquid interface self-assembly method. The bright Debye ring was observed clearly by laser vertical irradiation. PS colloidal microspheres were self-assembled into high-quality opal and threedimensional photonic crystal using an improved vertical self-assembled deposition method by adjusting the temperature and concentration of the microsphere in their aqueous solution. The controllable preparation and the characteristics of infrared band optical were studied using laser particle size analyzer, scanning electron microscope, infrared spectrometer etc. The forbidden band gap of the three-dimensional photonic crystals assembled from monodisperse colloidal microspheres of 1.10 μm was 2.25 μm, and that of the three-dimensional photonic crystals assembled from PS monodisperse colloidal microspheres of 1.20 μm was 2.47 μm. The above results were consistent with the theoretical calculation. The photonic crystal material could change the infrared radiation characteristics of the corresponding band gap and is expected to be applied to photonic crystal templates,thermal barrier coating materials and infrared stealth technology fields.
作者
闫丹
邱丽莉
孟子晖
薛敏
董晓
Dan Yan;Li-li Qiu;Zi-hui Meng;Min Xue;Xiao Dong(School of Chemistry and Chemical Engineering, Beijing Institue of Technology, Beijing 102488)
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2018年第6期733-740,共8页
Acta Polymerica Sinica
基金
国家自然科学基金(基金号21375009
U1530141)
北京理工大学科技创新计划基础研究基金(基金号20151042004)资助项目
关键词
光子禁带
红外辐射调控
微米级胶体晶体
Photonic band gap
Management of thermal radiation
Colloidal crystals
