基于单分散聚合物微球的功能材料及传感器研究

发布时间：2018-05-19 08:14

本文选题：种子聚合 + 化学镀　；参考：《青岛大学》2016年硕士论文

【摘要】：微米级与纳米级的聚苯乙烯或二氧化硅微球可以作为空心微球、光子晶体以及多孔材料的模板,通过模板可以进一步制备核壳材料、复合胶体晶体以及三维有序大孔材料。核壳材料的良好均一性与分散性等优点在导电胶膜与快速去污方面具有良好的应用前景。基于PS/Ag复合材料制备的传感器以及三维有序多孔碳修饰后的电极可以高效灵敏的检测卤素气体或者药物,并且具有重复性以及稳定性,在卤素气体与药物检测方面有良好的应用前景。本论文制备了PS/Ni核壳材料(Ni空心微球)、PS/Ag NPs复合胶体晶体以及三维有序多孔碳材料。并研究了其在各向异性导电胶膜、快速去污与萃取、气体响应性传感器以及修饰电极方面的应用。具体内容如下:1、基于种子聚合改良的一种高效率的边溶胀边聚合方法制备出平均粒径为6μm的聚苯乙烯微球聚合时间较传统聚合方法的3天缩短为22 h。以聚苯乙烯微球作为模板,通过化学镀镍方法制备出PS/Ni核壳微球。此外,将PS/Ni核壳微球作为导电微球制备出各向异性导电胶膜。最后去除PS核得到Ni的空心微球并将其应用于快速去污及萃取方面。2、用共沉积方法制备了光敏性的PS/AgBr复合胶体晶体,经紫外光照射处理之后,填入的AgBr分解为纳米Ag,得到了结构颜色增强的PS/Ag NPs复合胶体晶体。Ag纳米粒子增强结构颜色是由于吸收非相关散射光并提高色彩饱和度。用光纤光谱仪研究了PS胶体晶体、PS/AgBr复合胶体晶体以及PS/AgNPs复合胶体晶体的带隙并且分别与理论计算相对比。PS/Ag NPs复合胶体晶体可以作为检测时间为50 s、检测限为15 mmol/L的经济实用可量产的裸眼Br2传感器。3、以胶体晶体为模板制备了高度结晶的三维有序大孔C_(60)材料并用扫描电镜表征其内部结构,之后用制备的三维有序大孔C_(60)修饰Au电极。此外,用三维有序大孔C_(60)修饰的金电极在0.1 mol/L的pH=6的PBS缓冲溶液中检测不同浓度的多巴胺,表现出良好的效果并且其检测限是2.1×10~(-9) mol/L。
[Abstract]:The polystyrene or silica microspheres of micron and nano-scale can be used as templates of hollow microspheres photonic crystals and porous materials through which the core-shell materials composite colloidal crystals and three-dimensional ordered macroporous materials can be further prepared. The advantages of good uniformity and dispersion of core-shell materials have a good application prospect in conductive film and rapid decontamination. Sensors based on PS/Ag composites and three dimensional ordered porous carbon modified electrodes can be used to detect halogen gases or drugs with high efficiency and sensitivity, and are reproducible and stable. It has a good application prospect in the detection of halogen gas and drugs. In this paper, the PS/Ni core-shell material, PS-Ni hollow microspheres, PS / Ag NPs composite colloid crystals and three-dimensional ordered porous carbon materials were prepared. Its applications in anisotropic conductive film, rapid decontamination and extraction, gas responsivity sensor and modified electrode were also studied. The main contents are as follows: 1. The polymerization time of polystyrene microspheres with an average diameter of 6 渭 m was shortened to 22 hours in 3 days compared with the conventional polymerization method, based on a highly efficient edge swelling edge polymerization method based on seed polymerization. PS/Ni core-shell microspheres were prepared by electroless nickel plating using polystyrene microspheres as template. In addition, PS/Ni core-shell microspheres were used as conductive microspheres to prepare anisotropic conductive adhesive films. Finally, the hollow microspheres of Ni were obtained by removing PS nucleus and used in rapid decontamination and extraction. Guang Min composite colloidal crystals of PS/AgBr were prepared by co-deposition. The filled AgBr is decomposed into nano-Ag.The structure color-enhanced PS/Ag NPs composite colloidal crystal. AG nanoparticles enhance the structure color is due to the absorption of uncorrelated scattering light and the increase of color saturation. The band gap of PS / AgBr composite colloid crystal and PS/AgNPs composite colloidal crystal were studied by optical fiber spectrometer. Compared with the theoretical calculation, the PS / Ag NPs composite colloid crystal can be used as the detection time of 50 s and the detection limit of 15 mmol/L. Using colloidal crystal as template, the highly crystallized three-dimensional ordered macroporous Che 60) material was characterized by scanning electron microscope (SEM), and its internal structure was characterized by scanning electron microscope (SEM). The au electrode was then modified with three dimensional ordered macroporous CST60). In addition, the gold electrode modified with three dimensional ordered macroporous CST60 showed good results in the detection of dopamine at different concentrations in the PBS buffer solution of 0.1 mol/L pH=6, and the detection limit was 2.1 脳 10 ~ (-9) mol 路L ~ (-1) 路mol ~ (-1) 路L ~ (-1) 路mol ~ (-1) 路L ~ (-1).
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB33;TQ127.11

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